TCP/IP and the OSI Reference Model

As illustrated in Figure 1.2, the TCP/IP model consists of four layers, each of which can have several sublayers. These layers correlate roughly to layers in the OSI reference model and define similar functions. Some of the TCP/IP layers correspond directly with layers in the OSI reference model while other span several OSI layers. The four TCP/IP layers are:

...

• The TCP/IP Application Layer refers to communications services to applications and is the interface between the network and the application. It is also responsible for presentation and controlling communication sessions. It spans the Application Layer, Presentation Layer and Session Layer of the OSI reference model. Examples include: HTTP, POP3, and SNMP.

• The TCP/IP Transport Layer defines several functions, including the choice of protocols, error recovery and flow control. The transport layer may provide for retransmission, i.e., error recovery, and may use flow control to prevent unnecessary congestion by attempting to send data at a rate that the network can accommodate, or it might not, depending on the choice of protocols. Multiplexing of incoming data for different flows to applications on the same host is also performed. Reordering of the incoming data stream when packets arrive out of order is included. It correlates with the Transport Layer of the OSI reference model. Examples include: TCP and UDP, which are called Transport Layer, or Layer 4, protocols.

• The TCP/IP Internetwork Layer defines end-to-end delivery of packets and defines logical addressing to accomplish this. It also defines how routing works and how routes are learned; and how to fragment a packet into smaller packets to accommodate media with smaller maximum transmission unit sizes. It correlates with the Network Layer of the OSI reference model. Examples include: IP and ICMP.

• The TCP/IP Network Interface Layer is concerned with the physical characteristics of the transmission medium as well as getting data across one particular link or medium. This layer defines delivery across an individual link as well as the physical layer specifications. It spans the Data Link Layer and Physical Layer of the OSI reference model. Examples include: Ethernet and Frame Relay.

FIGURE: OSI, TCP/IP and NetWare

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CCNA Practice Tests 3.1.0

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CCNA Practice Tests - About CCNA - Cisco Certified Network Associate certification is awarded by Cisco(R) Systems on successful completion of CCNA (Exam code: 640-607) exam. CCNA is a foundation level certification offered by Cisco(R). The exam objectives include TCP/IP fundamentals, OSI model, networking fundamentals like Ethernet, Token Ring, FDDI;Cisco IOS fundamentals, and simple router and switch configurations. CCNA is a leading certification in the area of vendor specific certifications in computer networking technologies.
Practice tests for CCNA (Cisco Certified Network Associate) conforms to the latest objectives of the exam. The package contains 225+ questions and most questions carry detailed explanations. The question types presented in the exam simulator include multiple choice, true/false, exhibit based questions. Also, the test engine enables you to review the wrong answers at the end of the exam. Category wise scoring enables the candidate to know the weak areas for further study. CCNA exam also includes simulation questions. As a result, the CCNA practice tests offered by simulationexams.com also incorporate similar simulation exercises to prepare the students to face the certification exam more confidently.

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Ebook.CCNA Security Official Exam Certification Guide Exam 640-553 Exam Certifica.1587202204

Ebook.CCNA Security Official Exam Certification Guide Exam 640-553 Exam Certifica.1587202204
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CCNA 4 - Final Exam Answers

1
Which of the following describes the roles of devices in a WAN? (Choose three.)

*** A CSU/DSU terminates a digital local loop.

A modem terminates a digital local loop.

A CSU/DSU terminates an analog local loop.

*** A modem terminates an analog local loop.

*** A router is commonly considered a DTE device.

A router is commonly considered a DCE device.



www.p4s-ccna.blogspot.com

2
What value in the address field of a Frame Relay header identifies the destination of the frame?

CIR

DE

*** DLCI

ISDN

FRAD

PVC



3


The serial PPP link between the Left and Right routers is configured as shown in the diagram. Which configuration issue explains why the link is unable to establish a PPP session?

The IP addresses must be on different subnets.

*** The usernames are misconfigured.

The passwords must be different for the CHAP authentication.

The clock rate must be 56000.

The clock rate is configured on the wrong end of the link.

Interface serial 0/0 on Left must connect to interface serial 0/1 on Right.



4
The output of the show interfaces serial 0/0 command for a frame-relay connection indicates that the serial line is up but the line protocol is down. What are possible causes for this? (Choose two.)

*** There is an LMI-type mismatch between the Frame Relay switch and the router.

There is no clock present on the serial interface.

The interface is shut down.

RARP is not functioning on the router.

*** The cable is disconnected.



5
Which statements are correct about the point in the network where the responsibility of the service provider ends? (Choose three.)

*** The International point is on the customer side of the network terminating unit(NTU).

*** The United States point is at the interface of the customer-provided equipment and the local loop.

The responsibility for this point is controlled by IANA.

*** The point is called the demarcation point.

The point is typically located at the service provider's central office.

The point is located between the customer's local area networks.



6
While prototyping an internetwork in the corporate lab, a network administrator is testing a serial link between serial 0/0 interfaces on two routers. The labels on the serial cable ends have been damaged and are unreadable. What command can be issued to determine which router is connected to the DCE cable end?

show interfaces serial 0/0

show version

*** show controllers serial 0/0

show protocols serial 0/0

show status serial 0/0



7


A network technician determines DHCP clients are not working properly. The clients are receiving IP configuration information from a DHCP server configured on the router but cannot access the Internet. From the output in the graphic, what is the most likely problem?

The DHCP server service is not enabled.

The inside interface for DCHP is not defined.

*** The DHCP pool is not bound to the interface.

The pool does not have a default router defined for the clients.

All the host addresses have been excluded from the DHCP pool.



8
A technician enters the interface serial 0/0.1 multipoint command when configuring a router. What effect will the multipoint keyword have in this configuration? (Choose two.)

*** Split-horizon issues will need to be resolved for this network if RIP is the routing protocol.

A subinterface will be defined for each PVC.

*** All the participating interfaces of remote routers will be configured in the same subnet.

A single DLCI will be used to define all the PVCs to the remote routers.

An IP address will need to be configured on the main interface.



9
When configuring a Frame Relay connection, when should a static Frame Relay map be used? (Choose two.)

when the remote router is a non-Cisco router

*** when the remote router does not support Inverse ARP

when the local router is using IOS Release 11.1 or earlier

*** when broadcast traffic and multicast traffic over the PVC must be controlled

when globally significant rather than locally significant DLCIs are being used



10


Which router command would be used to associate a Layer 2 address with the corresponding Layer 3 address in the internetwork in the diagram?

RouterA(config-if)#frame-relay pvc 100 192.168.15.2

RouterA(config-if)#dialer-map ip 192.168.15.1 100 broadcast

*** RouterA(config-if)#frame-relay map ip 192.168.15.2 100 broadcast

RouterA (config-if)#dialer-map 192.168.15.1 101 serial 0 broadcast

RouterA (config-if)#frame-relay dlci 101 192.168.15.1 broadcast

RouterA (config-if)#dialer-map 192.168.15.1 inverse-arp broadcast



11
Which of the following ISDN protocols is responsible for call setup and call teardown?

*** ITU-T Q.921

ITU-T Q.931

ITU-T I.430

ITU-T I.431



12
What are two ways to resolve split-horizon issues in a Frame Relay network? (Choose two.)

*** create a full-mesh topology

disable Inverse ARP

*** use point-to-point subinterfaces

use multipoint subinterfaces

remove the broadcast keyword from the frame-relay map command



13


What is the purpose of the command marked with an arrow shown in the partial configuration output of a Cisco 806 broadband router?

defines which addresses are allowed out of the router

*** defines which addresses are allowed into the router

defines which addresses can be translated

defines which addresses are assigned to a NAT pool



14


A system administrator is unable to ping the Serial0/0 interface of RouterB from RouterA. During the troubleshooting process, the following facts are established:
- IP addressing and subnet masks are correct.
- RouterA is a Cisco router and RouterB is a router from another vendor.
- RouterA is configured with the default encapsulation.
- The serial interfaces on both routers are up.
- The protocol is down on the serial interfaces of both routers.

What should the administrator do to solve the problem?

Add a clock rate on RouterA.

Enable the serial interface on RouterB.

*** Change the encapsulation on both routers to PPP.

Connect the serial cable to the correct interface on RouterB.

Use the correct serial cable to attach the CSU/DSU to RouterB.



15
An ISDN circuit from a branch office is remaining connected to the regional office. A network administrator determines a user has initiated a continuous ping from a desktop computer to the regional office. Which configuration change would allow the ISDN circuit to disconnect during any attempts to ping, while otherwise functioning properly?

change DDR from legacy to dialer profiles

remove the dialer list statement from the configuration

*** change the dialer list to exclude ICMP as interesting

disable inverse ARP


16
Below is a list of DDR steps. Which of the following identifies the proper order of DDR?

1 - dial number is looked up
2 - interesting traffic triggers DDR
3 - route to destination is determined
4 - call is made

1,2,3,4

1,3,2,4

2,3,1,4

2,1,3,4

*** 3,2,1,4

3,1,2,4



17
Which protocol should be chosen to support WAN connectivity in a multi-vendor system and provide strong security through authentication?

NAT with DHCP

Frame Relay

HDLC with encryption

HDLC with CHAP

PPP with PAP

*** PPP with CHAP



18
Which of the following are valid steps for a basic ISDN BRI configuration? (Choose two.)

create subinterfaces

define the LMI type

*** set the SPIDs if required by the ISDN switch

set the interface DLCI

*** set the switch type

specify the encapsulation as either Cisco or IETF



19
A branch office reports excessive connect time charges for an ISDN circuit used to connect to the regional office. Upon investigation of this issue, it is discovered that when an ISDN connection is initiated to the regional office it remains connected for an excessive amount of time. Which of the following configuration changes could be made to DDR on the router to reduce these connect time charges?

use PPP multilink

lower idle timer setting

use CHAP authentication

*** change DDR from legacy to dialer profiles



20
A network administrator is having difficulty in establishing a serial link between a Cisco router and a router from another vendor. Both routers are configured for HDLC encapsulation. Which statements are true regarding this configuration? (Choose two.)

*** The Cisco HDLC frame uses a proprietary "Type" field that may not be compatible with equipment of other vendors.

HDLC requires a clock rate to be configured on the routers at both ends of the serial link.

*** PPP encapsulation is recommended for serial links between equipment from multiple vendors.

Usernames must be configured at both ends of the HDLC serial link.

The HDLC vendor type must be enabled on the Cisco router.

There is a mismatch in the HDLC authentication password configurations.



21


Given the partial router configuration in the graphic, why does the workstation with the IP address 192.168.1.153/28 fail to access the Internet? (Choose two.)

*** The NAT inside interfaces are not configured properly.

The NAT outside interface is not configured properly.

*** The router is not properly configured to use the access control list for NAT.

The NAT pool is not properly configured to use routable outside addresses.

The access control list does not include the IP address 192.168.1.153/28 to access the Internet.



22


The serial PPP link between the Left and Right routers is configured as shown in the diagram. Which configuration issue will prevent IP traffic from crossing this link?

The passwords must be different for the CHAP authentication.

The usernames are misconfigured.

The clock rate must be 56000.

The clock rate is configured on the wrong end of the link.

*** The IP addresses must be on the same subnet.

Interface serial 0/0 on Left must connect to interface serial 0/1 on Right.



23
What causes a DDR call to be placed?

dial string

DLCI

idle time out

*** interesting traffic

PVC



24
Which two layers of the OSI model are described by WAN standards?

Application Layer, Physical Layer

*** Data Link Layer, Physical Layer

Data Link Layer, Transport Layer

Physical Layer, Network Layer



25


A technician is testing RouterA in the graphic. What is the condition of the circuit?

The routers are configured for different encapsulations.

*** The clock rate is not properly configured on the routers.

The circuit from WAN provider has failed.

Authentication is not properly configured on the routers.

The circuit is functioning properly.



26
A network administrator must provide WAN connectivity between a central office and three remote sites: Orlando, Atlanta, and Phoenix. The Orlando and Atlanta remote offices receive sales orders and transmit shipping confirmations to the Central office consistently throughout the day. The Phoenix remote office consists of one salesperson traveling through the southwest territory. The salesperson occasionally needs to connect to the Central office for e-mail access. How should the network administrator connect the remote sites to the Central office? (Choose two.)

*** Connect to the Atlanta and Orlando remote offices with Frame Relay connections.

Connect to the Atlanta and Orlando remote offices with ISDN connections.

Connect to the Atlanta and Orlando remote offices with POTS dial-up connections.

Connect to the Phoenix remote office with a Frame Relay connection.

*** Connect to the Phoenix remote office with a POTS dial-up connection.



27
When a Frame Relay switch detects an excessive buildup of frames in its queue, which of the following may occur? (Choose two.)

*** Frames with the DE bit set are dropped from the switch queue.

Frames with the FECN and BECN bits set are dropped from the switch queue.

Frames in excess of the CIR are not accepted by the switch.

The switch sets the FECN bit on all frames it places on the congested link and sets the BECN bit on all frames it receives on the congested link.

*** The switch sets the FECN bit on all frames it receives on the congested link and sets the BECN bit on all frames it places on the congested link.



28


A system administrator is troubleshooting a connectivity issue between two routers in a new installation. The administrator enters the debug ppp authentication command on the WHSE router. The graphic shows a part of the output received. From this output, what is the most likely cause of this connectivity issue?

There is not a route to the remote router.

The ISDN circuit on the remote router has failed.

*** The username/password was not properly configured on the WHSE router.

The remote router has a different authentication protocol configured.



29
What does the output of the show frame-relay map command shown below represent? (Choose two.)
Serial 0 (up): ip 172.30.151.4 dlci 122, dynamic, broadcast, status defined, active

*** 172.30.151.4 represents the IP address of the remote router.

172.30.151.4 represents the IP address of the local serial interface.

DLCI 122 represents the interface of the remote router.

broadcast indicates that a dynamic routing protocol such as RIP v1 can send packets across this PVC.

*** dynamic indicates that a dynamic routing protocol is enabled for this connection.

active indicates that the ARP process is working.



30
What does the status inactive indicate in the output of the show frame-relay pvc command?

*** The DLCI is programmed in the switch but is not usable.

The DLCI was formerly programmed in the switch but is no longer there.

The DLCI is usable but has little activity.

The DLCI has been renamed for that PVC.


31
Which of the following IP addresses are defined by RFC 1918 as private addresses? (Choose three.)

*** 192.168.146.0/22

172.10.25.0/16

*** 172.31.0.0/16

20.0.0.0/8

*** 10.172.92.8/29



32
After configuring a dialup ISDN circuit, a network associate begins testing the dialup connection. When attempting to ping a host on the remote network, the local router does not attempt to dial the remote access server. Which of the following are possible errors in this configuration? (Choose three.)

PPP authentication is not properly configured.

*** No dialer map is configured.

The ISDN circuit connected to the remote access server is busy.

*** No interesting traffic is defined.

No route is determined to the remote network.

*** A wrong number is configured in the dial string.



33
Two routers are connected through a Frame Relay, point-to-point PVC. The remote router is from a vendor other than Cisco. Which interface command is required to configure the link between the Cisco router and the other router?

frame-relay pvc multipoint

frame-relay pvc point-to-point

encapsulation frame-relay cisco

*** encapsulation frame-relay ietf

frame-relay lmi-type ansi



34
Which circuit-switched WAN technology is often used to provide a backup for a leased line and additional capacity during peak usage times?

X.25

DSL

*** ISDN

cable modem



35
After the ISDN BRI interface is configured, which command can be used to verify that the router is communicating correctly with the ISDN switch?

show dialer

show isdn status

*** show interfaces bri0/0:1

show interfaces serial0/0.1



36
A system administrator needs to configure the regional office with ISDN for DDR connections to three remote sites. Each remote site requires different IP subnets, different encapsulations, and different authentication methods. The sites will not be connected at the same time. The company would like to accomplish this in the most cost effective manner. What method can the system administrator use to accomplish this task using the fewest B channels?

Install and configure a PRI.

Install and configure a BRI interface with separate SPIDs for each remote site.

Install and configure a BRI with multiple switch types in global configuration.

*** Install and configure a BRI using dialer profiles.

Install and configure a separate BRI for each remote site.



37
A system administrator must provide Internet connectivity for ten hosts in a small remote office. The ISP has assigned two public IP addresses to this remote office. How can the system administrator configure the router to provide Internet access to all ten users at the same time?

Configure static NAT for all ten users.

*** Configure dynamic NAT for ten users.

Configure dynamic NAT with PAT.

Configure DHCP and static NAT.

What the administrator wants to do cannot be done.



38
Which of the following are characteristics of Frame Relay? (Choose two.)

circuit-switched

*** connection oriented

OSI Layer 3

*** packet-switched

reliable



39
Which of the following is the order for the three phases of establishing a PPP serial link with authentication?

authentication, link-establishment, network layer protocols

authentication, network layer protocols, link-establishment

network layer protocols, link-establishment, authentication

network layer protocols, authentication, link-establishment

*** link-establishment, authentication, network layer protocols

link-establishment, network layer protocols, authentication

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CCNA 2 v4.0 Final Exam Answers

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CCNA1 V4.0 Final 100%

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Cisco Press ICND1 2nd Edition Jan 2008

Contents at a Glance
Foreword xxii
Introduction xxiii
Chapter 1 Building a Simple Network 3
Chapter 2 Ethernet LANs 139
Chapter 3 Wireless LANs 207
Chapter 4 LAN Connections 237
Chapter 5 WAN Connections 345
Chapter 6 Network Environment Management 425
Appendix Answers to Chapter Review Questions 465
Index 480

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CCNA1 FINAL 100% (Updated Jan 14 - 2009)

1 A PC can not connect to any remote websites, ping its default gateway, or ping a printer that is functioning properly on the local network segment. Which action will verify that the TCP/IP stack is functioning correctly on this PC?

Use the ipconfig /all command at the host�s command prompt.
----> Use the ping 127.0.0.1 command at the command prompt.
Use the traceroute command at the command prompt to identify any failures on the path to the gateway.
Use FTP to check for connectivity to remote sites.
Download a troubleshooting tool from the PC manufacturer's website.



2 Refer to the exhibit. Which set of devices contains only intermediary devices?

----> A, B, D, G
A, B, E, F
C, D, G, I
G, H, I, J


3 Refer to the exhibit. When computer A sends a frame to computer D, what computers receive the frame?

----> only computer D
only computer A and computer D
only computer B, computer C, and computer D
all computers


4 Which password is automatically encrypted when it is created?

vty
aux
console
----> enable secret
enable password


5 Which three statements characterize the transport layer protocols? (Choose three.)

----> TCP and UDP port numbers are used by application layer protocols.
TCP uses port numbers to provide reliable transportation of IP packets.
UDP uses windowing and acknowledgments for reliable transfer of data.
----> TCP uses windowing and sequencing to provide reliable transfer of data.
----> TCP is a connection-oriented protocol. UDP is a connectionless protocol.


6 Which type of media is immune to EMI and RFI? (Choose two.)

10 Base-T
10 Base-2
10 Base-5
----> 100 Base-FX
100 Base TX
----> 1000 Base LX


7 Refer to the exhibit. A technician is working on a network problem that requires verification of the router LAN interface. What address should be pinged from this host to confirm that the router interface is operational?

127.0.0.1
192.168.64.196
----> 192.168.254.1
192.168.254.9
192.168.254.254


8 Refer to the exhibit. The diagram represents the process of sending email between clients. Select the list below that correctly identifies the component or protocol used at each numbered stage of the diagram.

1.MUA 2.MDA 3.MTA 4.SMTP 5.MTA 6.POP 7.MDA 8.MUA
1.MUA 2.POP 3.MDA 4.SMTP 5.MTA 6.MDA 7.SMTP 8.MUA
1.MUA 2.POP 3.SMTP 4.MDA 5.MTA 6.SMTP 7.POP 8.MUA
1.MDA 2.SMTP 3.MTA 4.SMTP 5.MTA 6.MUA 7.POP 8.MDA
----> 1.MUA 2.SMTP 3.MTA 4.SMTP 5.MTA 6.MDA 7.POP 8.MUA


9 Refer to the exhibit. What function does router RT_A need to provide to allow Internet access for hosts in this network?

----> address translation
DHCP services
ftpd
web server


10 Refer to the exhibit. The network containing router B is experiencing problems. A network associate has isolated the issue in this network to router B? What action can be preformed to correct the network issue?

issue the ip address command on interface FastEthernet 0/0
----> issue the no shutdown command on interface FastEthernet 0/1
issue the clock rate command on interface Serial 0/0/0
issue the description command on interface Serial 0/0/1


11 Which three IPv4 addresses represent a broadcast for a subnet? (Choose three.)

----> 172.16.4.63 /26
172.16.4.129 /26
----> 172.16.4.191 /26
172.16.4.51 /27
----> 172.16.4.95 /27
172.16.4.221 /27


12 What are three characteristics of CSMA/CD? (Choose three.)

Devices can be configured with a higher transmission priority.
A jam signal indicates that the collision has cleared and the media is not busy.
----> A device listens and waits until the media is not busy before transmitting.
The device with the electronic token is the only one that can transmit after a collision.
----> All of the devices on a segment see data that passes on the network medium.
----> After detecting a collision, hosts can attempt to resume transmission after a random time delay has expired.


13 In a Cisco IOS device, where is the startup-configuration file stored?

Flash
----> NVRAM
RAM
ROM


14 A routing issue has occurred in you internetwork. Which of the following type of devices should be examined to isolate this error?

access point
host
hub
----> router
switch


15 Which OSI layer protocol does IP rely on to determine whether packets have been lost and to request retransmission?

application
presentation
session
----> transport


16 Due to a security violation, the router passwords must be changed. What information can be learned from the following configuration entries? (Choose two.)

Router(config)# line vty 0 3
Router(config-line)# password c13c0
Router(config-line)# login

The entries specify three Telnet lines for remote access.
----> The entries specify four Telnet lines for remote access.
The entries set the console and Telnet password to "c13c0".
Telnet access will be denied because the Telnet configuration is incomplete.
----> Access will be permitted for Telnet using "c13c0" as the password.


17 Which prompt represents the appropriate mode used for the copy running-config startup-config command ?

Switch-6J>
----> Switch-6J#
Switch-6J(config)#
Switch-6J(config-if)#
Switch-6J(config-line)#


18 Which combination of network id and subnet mask correctly identifies all IP addresses from 172.16.128.0 through 172.16.159.255?

172.16.128.0 255.255.255.224
172.16.128.0 255.255.0.0
172.16.128.0 255.255.192.0
----> 172.16.128.0 255.255.224.0
172.16.128.0 255.255.255.192


19 When must a router serial interface be configured with the clock rate command?

when the interface is functioning as a DTE device
when the interface timers have been cleared
when the connected DTE device is shut down
----> when the interface is functioning as a DCE device


20 When connectionless protocols are implemented at the lower layers of the OSI model, what are usually used to acknowledge the data receipt and request the retransmission of missing data?

connectionless acknowledgements
----> upper-layer connection-oriented protocols
Network layer IP protocols
Transport layer UDP protocols


21 A technician is asked to secure the privileged EXEC mode of a switch by requiring a password. Which type of password would require this login and be considered the most secure?

console
enable
----> enable secret
VTY


22 Refer to the exhibit. What is required on host A for a network technician to create the initial configuration on RouterA?

a FTP client
a telnet client
----> a terminal emulation program
a web browser


23 Refer to the exhibit. A network administrator remotely accesses the CLI of RouterB from PC1. Which two statements are true about the application layer protocol that is used to make this connection? (Choose two.)

The data is encrypted.
----> The connection type is called a VTY session.
A server process is running on PC1.
A GET request is sent to RouterB.
----> The application name is the same for the service, protocol, and client.


24 The Layer 4 header contains which type of information to aid in the delivery of data?

----> service port number
host logical address
device physical address
virtual connection identifier


25 Refer to the exhibit. What two facts can be determined about the exhibited topology? (Choose two.)

----> A single broadcast domain is present
Two logical address ranges are required.
Three broadcast domains are shown.
Four networks are needed.
----> Five collision domains exist.


26 Refer to the exhibit. A network technician is trying to determine the correct IP address configuration for Host A. What is a valid configuration for Host A?

IP address: 192.168.100.19; Subnet Mask: 255.255.255.248; Default Gateway: 192.16.1.2
----> IP address: 192.168.100.20; Subnet Mask: 255.255.255.240; Default Gateway: 192.168.100.17
IP address: 192.168.100.21; Subnet Mask: 255.255.255.248; Default Gateway: 192.168.100.18
IP address: 192.168.100.22; Subnet Mask: 255.255.255.240; Default Gateway: 10.1.1.5
IP address: 192.168.100.30; Subnet Mask: 255.255.255.240; Default Gateway: 192.168.1.1
IP address: 192.168.100.31; Subnet Mask: 255.255.255.240; Default Gateway: 192.168.100.18


27 Refer to the exhibit. Cable 1 and cable 2 have the ends wired for specific physical layer requirements. The table lists each segment by number and the cable which has been installed by the network technician between the network components on that segment. From the data given, which segments have the correct cable installed? (Choose three.)

----> segment1
segment2
----> segment3
----> segment4
segment5


28 What is true regarding network layer addressing? (Choose three.)

uses a flat structure
prevent broadcasts
----> heirarchical
----> uniquely identifies each host
48 bits in length
----> contains a network portion


29 Refer to the exhibit. A router, whose table is shown, receives a packet that is destined for 192.168.1.4. How will router treat the packet?

The packet will be dropped.
The packet will be forwarded via FastEthernet 0/0.
----> The packet will be forwarded to the destination host.
The packet will be forwarded to the 192.168.1.3 next-hop address.


30 Refer to the exhibit. Which two statements describe the information that is represented in the header? (Choose two.)

This is a server response.
The UDP protocol is being used.
----> The destination port indicates a Telnet session.
----> The return segment will contain a source port of 23.
The next session originated from the client of this session will use the source port number 13358.


31 Refer to the exhibit. What is the correct destination socket number for a web page request from Host A to the web server?

00-08-a3-b6-ce-46
----> 198.133.219.25:80
http://www.cisco.com
C 198.133.219.0/24 is directly connected, FastEthernet0/0


32 During the encapsulation process, which identifiers are added at the transport layer?

two networks routing the packets
----> two applications communicating the data
two hosts at either end of the communication
two nodes on the local network exchanging the frame


33 Refer to the exhibit. A student has wired each end of a CAT 5e cable as shown. What is the result? (Choose two.)

The cable is unusable and must be rewired.
The cable is suitable for use as a Gigabit Ethernet straight-through.
----> The cable is suitable for use as a Fast Ethernet crossover.
The cable is suitable for use as a rollover cable.
The cable is suitable for use as a Gigabit Ethernet crossover.
----> The cable is suitable for use between two 100 Mbps Auto-MDIX capable switches.


34 Refer to the exhibit. Assume all devices are using default configurations. How many subnets are required to address the topology that is shown?

1
----> 3
4
5
7


35 Refer to the exhibit. On the basis of the IP configuration that is shown, what is the reason that Host A and Host B are unable to communicate outside the local network?

Host A was assigned a network address.
Host B was assigned a multicast address.
Host A and Host B belong to different networks.
----> The gateway address was assigned a broadcast address.


36 Refer to the exhibit. Each media link is labeled. What type of cable should be used to connect the different devices?

Connection 1 - rollover cable
Connection 2 - straight-through cable
Connection 3 - crossover cable

Connection 1 - crossover cable
Connection 2 - rollover cable
Connection 3 - crossover cable

Connection 1 - straight-through cable
Connection 2 - crossover cable
Connection 3 - crossover cable

----> Connection 1 - straight-through cable
Connection 2 - crossover cable
Connection 3 - straight-through cable


Connection 1 - crossover cable
Connection 2 - straight-through cable
Connection 3 - crossover cable


37 Refer to the exhibit. What does the IP address 192.168.33.2 represent?

The host's default gateway.
The host's IP address.
----> The host's primary domain name server.
The IP address of the website resolver1.mooki.local.
The IP address of the host's homepage.


38 Refer to the exhibit. What two facts can be determined from the information that is given? (Choose two.)

This exchange is part of the three-way handshake.
The source port indicates that a Telnet session has been initiated.
The data is flowing from server to client.
----> The destination port indicates that an HTTP session has been initiated.
X The data listed is associated with the transport layer.
The source port does not support communication with the destination port that is listed.


39 Which of the following are the address ranges of the private IP addresses? (Choose three.)

----> 10.0.0.0 to 10.255.255.255
200.100.50.0 to 200.100.25.255
150.150.0.0 to 150.150.255.255
----> 172.16.0.0 to 172.31.255.255
----> 192.168.0.0 to 192.168.255.255
127.16.0.0 to 127.31.255.255


40 Which two functions of the OSI model occur at layer two? (Choose two.)

----> physical addressing
encoding
routing
cabling
----> media access control


41 Which range of port numbers are reserved for services that are commonly used by applications that run on servers?

0 to 255
----> 0 to 1023
1024 to 49151
49152 to 65535


42 As network administrator, what is the subnet mask that allows 510 hosts given the IP address 172.30.0.0?

255.255.0.0
255.255.248.0
255.255.252.0
----> 255.255.254.0
255.255.255.0
255.255.255.128


43 Refer to the exhibit. The tracert command is initiated from PC1 to the destination PC4. Which device will send a response to the initial packet from PC1?

----> London
Paris
Athens
Ankara
PC4


44 Refer to the exhibit. Host A is transmitting data to host B. What addresses will host A use to for the destination IP and MAC addresses in this communication?

Destination MAC: BBBB:BBBB:BBBB Destination IP: 172.22.0.62
Destination MAC: DDDD:DDDD:DDDD Destination IP: 172.22.0.75
Destination MAC: EEEE:EEEE:EEEE Destination IP: 172.22.0.62
Destination MAC: BBBB:BBBB:BBBB Destination IP: 172.22.0.75
----> Destination MAC: EEEE:EEEE:EEEE Destination IP: 172.22.0.75
Destination MAC: DDDD:DDDD:DDDD Destination IP: 172.22.0.94


45 Refer to the exhibit. Which logical topology best describes the exhibited network?

star
ring
point-to-point
----> multiaccess
mesh


46 Examine the graphic with current configurations. Host A in the Clerical offices failed and was replaced. Although a ping to 127.0.0.1 was successful, the replacement computer can not access the company network. What is the likely cause of the problem?

IP address incorrectly entered
network cables unplugged
----> subnet mask incorrectly entered
network card failure


47 Refer to the exhibit. With the router running NAT, what IP addresses can be applied to the computer to allow access to the Internet? (Choose three.)

192.168.18.38
192.168.18.48
----> 192.168.18.49
----> 192.168.18.52
----> 192.168.18.59
192.168.18.63


48 Refer to the exhibit. What three statements are true about the IP configuration that is shown? (Choose three.)

----> The address that is assigned to the computer represents private addressing.
----> The computer is unable to communicate outside of the local network.
The network of this computer can have 126 hosts.
----> The prefix of the computer address is /27.
The IP address that is assigned to the computer is routable on the Internet.
The IP address that is assigned to the computer is a broadcast address.


49 Refer to the exhibit. Host A attempts to establish a TCP/IP session with host C. During this attempt, a frame was captured with the source MAC address 0050.7320.D632 and the destination MAC address 0030.8517.44C4. The packet inside the captured frame has an IP source address 192.168.7.5, and the destination IP address is 192.168.219.24. At which point in the network was this packet captured?

leaving host A
leaving ATL
----> leaving Dallas
leaving NYC


50 Which of the following OSI layers offers reliable, connection-oriented data communication services?

application
presentation
session
----> transport
network

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CCNA Practice Exam - Cisco Certified Network Associate 640-802

About CCNA™ certification: CCNA - Cisco Certified Network Associate is an entry level certification and the most popular Cisco certification. Getting CCNA certified ensures that the candidate has enough knowledge to plan, configure, and operate simple routed WAN and switched LAN networks using Cisco products. CCNP - Cisco Certified Networking Professional is the next level of certification offered in the Cisco product implementation track. No pre-qualification is necessary to take CCNA exam.  640-802 is the only exam necessary to pass for obtaining CCNA certification. The exam covers topics on Extending Switched Networks with VLANS, Determining IP Routes, Managing IP traffic with Access Lists and extended Access Lists, Establishing Point-to-Point connections, OSPF, and Establishing Frame Relay Connections. You can also obtain CCNA certification by passing two exam track consisting of CCNA ICND1 (640-822), and CCNA ICND2 (640-816).

Cisco® CCNA Certification Exam Details*:

Exam # 640-802 (Cisco Certified Network Associate) Number of questions 50-60 Time allowed 90 minutes Passing score 849/1000** Register for exam at VUE (www.vue.com/cisco) Exam objectives http://www.cisco.com/web/learning/le3/current_exams/640-802.html Books Recommended Click Here to view recommeded CCNA books Download Practice tests  Download CCNA practice exams View practice questions VLANs WANs General  Simulation Exercises Buy practice tests Click here to buy ccna practice exams  Questions types Cisco Career Certification exams include the following test formats: Multiple-choice single answer Multiple-choice multiple answer Drag-and-drop Fill-in-the-blank Testlet Simlet Simulations Exam Objectives Describe how a network works Configure, verify and troubleshoot a switch with VLANs and interswitch communications Implement an IP addressing scheme and IP Services to meet network requirements in a medium-size Enterprise branch office network. Configure, verify, and troubleshoot basic router operation and routing on Cisco devices Explain and select the appropriate administrative tasks required for a WLAN Identify security threats to a network and describe general methods to mitigate those threats Implement, verify, and troubleshoot NAT and ACLs in a medium-size Enterprise branch office network. Implement and verify WAN links

* It is recommended that you verify with the official Web site for current and exact information.

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