CCNA2 Chapter 6 V4.1 (true 100%)

Chapter 6 With 100% Accurate Answers

1. Which command is used to view the RIP routing protocol settings and configuration?

show version
show ip route
show interface
**show ip protocols


2. Refer to the exhibit. What is the maximum number of RIP routers that could separate HostA and HostB and still leave the hosts with connectivity to each other?

14
15
**16
17


3. In which situation would a company register for its own autonomous system number (ASN)?

when the company's ISP adds connection points to the Internet
when additional routers are added to the corporate internetwork
when more than one interior routing protocol is used
**when the company uses two or more ISPs


4. Consider this routing table entry

R 172.16.1.0/24 [120/1] via 200.1.1.1 00:00:27 Serial0/1

What type of route is this?

a static route
a default route
**a RIP route
an OSPF route
an EIGRP route
a directly-connected route


5. What is the difference between interior and exterior routing protocols?

Exterior routing protocols are only used by large ISPs. Interior routing protocols are used by small ISPs.
Interior routing protocols are used to route on the Internet. Exterior routing protocols are used inside organizations.
Exterior routing protocols are used to administer a single autonomous system. Interior routing protocols are used to administer several domains.
**Interior routing protocols are used to communicate within a single autonomous system. Exterior routing protocols are used to communicate between multiple autonomous systems.


6. What information is included in RIPv2 routing updates that is not included in RIPv1 updates?

metric
**subnet mask
area identification
hop count
autonomous system number


7. Which routing protocol is used to exchange data between two different ISPs?

**BGP
EIGRP
OSPF
RIP v2


8. Refer to the exhibit. Which configuration command or commands contributed to the output that is shown?

routerA(config-router)# no version 2
routerA(config)# interface fa0/0
routerA(config-if)# ip address 172.19.0.0 255.255.0.0
**routerA(config-router)# network 192.168.3.0
routerA(config)# no ip default-gateway


9. Refer to the exhibit. If all routers are running RIP and network 10.0.0.0 goes down, when will R3 learn that the network is no longer available?

in 30 seconds
in 60 seconds
in 90 seconds
**Immediately


10. What statement is true regarding an AS number?

AS numbers are controlled and registered for Internet use.
Interior routing protocols require registered AS numbers.
ISPs require all customers to have registered AS numbers.
All routers at an ISP must be assigned the same AS number.


11. What is the purpose of the network command used when configuring RIP?

to specify whether RIPv1 or RIPv2 will be used as the routing protocol
to allow the router to monitor RIP updates that occur on other routers
**to identify which networks on the router will send and receive RIP updates
to configure the IP address on an interface that will use RIP
to identify all of the remote networks that should be reachable from the router


12. Which command would a network administrator use to determine if the routers in an enterprise have learned about a newly added network?

router# show ip address
router# show ip route
**router# show ip networks
router# show ip interface brief
router# debug ip protocol
router# debug rip update


13. What is the purpose of a routing protocol?

It is used to build and maintain ARP tables.
It provides a method for segmenting and reassembling data packets.
It allows an administrator to devise an addressing scheme for the network.
**It allows a router to share information about known networks with other routers.
It provides a procedure for encoding and decoding data into bits for packet forwarding.


14. What device enables an ISP to connect with other ISPs to transfer data?

**border gateway router
DSLAM
web server
interior router


15. Which command will display RIP routing updates as they are sent and received?

show ip route
show ip rip
debug ip rip
show ip protocols
**show ip rip database


16. Which part of an IP packet does the router use to make routing decisions?

source IP address
source MAC address
**destination IP address
destination MAC address


17. What two types of businesses would benefit from registering as their own autonomous systems? (Choose two.)

a home business with one ISP connection
**a global business with connections to multiple local ISPs
**a medium-sized nationwide business with Internet connectivity through different ISPs
a large enterprise with two connections to the same ISP
a small ISP with a single Internet connection through a larger ISP


18. Which command will display RIP activity as it occurs on a router?

debug ip rip
show ip route
show ip interface
show ip protocols
debug ip rip config
**show ip rip database


19. Why is fast convergence desirable in networks that use dynamic routing protocols?

**Routers will not allow packets to be forwarded until the network has converged.
Hosts are unable to access their gateway until the network has converged.
Routers may make incorrect forwarding decisions until the network has converged.
Routers will not allow configuration changes to be made until the network has converged.


20. Which two statements describe static routes? (Choose two.)

They are created in interface configuration mode.
**They require manual reconfiguration to accommodate network changes.
They automatically become the default gateway of the router.
**They are identified in the routing table with the prefix S
They are automatically updated whenever an interface is reconfigured or shutdown.


21. Which two statements or sets of statements describe differences between link-state and distance vector routing protocols? (Choose two.)

Link-state routing protocols routinely use more bandwidth for updates than do distance vector routing protocols.
Distance vector routing protocols update all routers at one time. Link-state routing protocols update one router at a time.
**Link-state routers only know about directly connected routers. Distance vector routers know about every router in the network.
**Link-state routing protocols update when a change is made. A network using distance vector routing protocols only updates at a specific interval.
Distance vector routing protocols have limited information about the entire network. Link state routing protocols know about all routers in the network.
In case of similar topologies, networks using link-state routing protocols typically converge more rapidly than do networks using distance vector routing protocols.


22. Which protocol is an exterior routing protocol?

**BGP
EIGRP
OSPF
RIP


23. Hosts on two separate subnets cannot communicate. The network administrator suspects a missing route in one of the routing tables. Which three commands can be used to help troubleshoot Layer 3 connectivity issues? (Choose three.)

**Ping
show arp
**Traceroute
**show ip route
show interface
show cdp neighbor detail


24. What term refers to a group of networks that uses the same internal routing policies and is controlled by a single administrative authority?

Internet
intranet
virtual private network
**autonomous system

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CCNA v4 - E2 - Module 6

I don't sure in question 19, please check it. may be true answer is "The default gateway on host B is not correctly set." You can comment about your thing. (95.1%)

1. Refer to the exhibit. In the network that is shown, the router interfaces are assigned the first address in each subnet. Which IP address would be usable for a host on one of the LANs in this network?

  192.168.2.130/25

2. Which of the following problems does VLSM help to alleviate?

  the shortage of IP addresses

3. What two advantages does CIDR provide to a network? (Choose two.)

  reduced routing table size
  reduced routing update traffic

4. Refer to the exhibit. The network administrator wants to minimize the number of entries in Router1’s routing table. What should the administrator implement on the network?

  CIDR

5. Which of the following are contained in the routing updates of classless routing protocols? (Choose two.)

  32-bit address
  subnet mask

6. A router has a summary route to network 192.168.32.0/20 installed in its routing table. What range of networks are summarized by this route?

  192.168.32.0 – 192.168.47.0/24

7. A Class C address has been assigned for use in the network shown in the graphic. Using VLSM, which bit mask should be used to provide for the number of host addresses required on Router A, while wasting the fewest addresses?

  /27

8. Refer to the exhibit. The network administrator wants to create a subnet for the point-to-point connection between the two routers. Which subnetwork mask would provide enough addresses for the point-to-point link with the least number of wasted addresses?

  255.255.255.252

9. Which three interior routing protocols support VLSM? (Choose three.)

  OSPF
  RIP v2
  EIGRP

10.  
A network administrator is tasked with dividing up a class C network among the QA, Sales, and Administration departments. The QA department is made up of 10 people, the Sales is made up of 28 people, and the Administration has 6. Which two subnets masks adequately address the QA and Sales departments? (Choose two.)

  255.255.255.224 for Sales
  255.255.255.240 for QA

11. Refer to the exhibit. A network engineer is summarizing the two groups of routes on router R1 shown in the exhibit. Which summarization will work for all the subnets?

  192.168.0.0/21

12. Refer to the exhibit. The number of required host addresses for each subnet in a network is listed in the exhibit. This number includes the host address requirements for all router ports and hosts on that subnet. After all device and router port address assignments are determined, what will be the total number of unused host addresses available?

  29

13. An additional subnet is required for a new Ethernet link between Router1 and Router2 as shown in the diagram. Which of the following subnet addresses can be configured in this network to provide a maximum of 14 useable addresses for this link while wasting the fewest addresses?

  192.1.1.224/28

14. What is a supernet?

  a summarization of serveral IP classful networks into one IP address range

15. Refer to the exhibit. Which address is a broadcast address for one of the subnets that are shown in the exhibit?

  192.168.4.15/29

16. In the network shown in the graphic, three bits were borrowed from the host portion of a Class C address. How many valid host addresses will be unused on the three point-to-point links combined if VLSM is not used?

  84

17. Refer to the exhibit. What subnet mask will be applied if Router A sends a RIPv1 update for the network 172.16.1.0 to Router B?

  24

18. Refer to the exhibit. A network administrator needs to create two subnetworks from 10.0.0.0/8 for a router running RIPv2. The Admin subnet requires 120 hosts and the Sales subnet requires 58 hosts. The network administrator assigned 10.0.1.128/25 to the Admin subnet. The Sales subnet is given 10.0.1.192/26. What will be the result of this addressing scheme?

  The subnets overlap and will be rejected by the router.

19. Refer to the exhibit. A network technician enters the static route in R1 needed to reach network 10.1.1.0/24. A ping from R1 to Host B fails. The technician begins testing the network and has the following results:

1. pings from R1 to the S0/0/0 interface on R2....successful
2. pings from R1 to the Fa0/0 interface on R2....successful
3. pings from Host B to hosts on the 10.1.1.0/24 network....successful
4. pings from Host B to the Fa0/0 interface on R2....successful
5. pings from R2 to Host B....successful

What is the likely cause of the failure of the ping from R1 to Host B?

  R2 does not have routes back to networks connected to R1.

20. What does VLSM allow a network administrator to do?

  utilize multiple subnet masks in the same IP address space

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CCNA 2 - Module 6

What two advantages does CIDR provide to a network? (Choose two.)
reduced routing table size
reduced routing update traffic

Refer to the exhibit. The network administrator wants to create a subnet for the point-to-point connection between the two routers. Which subnetwork mask would provide enough addresses for the point-to-point link with the least number of wasted addresses?
255.255.255.252

Refer to the exhibit. A network engineer is summarizing the two groups of routes on router R1 shown in the exhibit. Which summarization will work for all the subnets?
192.168.0.0/21

Which of the following are contained in the routing updates of classless routing protocols? (Choose two.)
32-bit address
subnet mask

Which of the following problems does VLSM help to alleviate?
the shortage of IP addresses

What does VLSM allow a network administrator to do?
utilize multiple subnet masks in the same IP address space

Refer to the exhibit. What subnet mask will be applied if Router A sends a RIPv1 update for the network 172.16.1.0 to Router B?
24

Refer to the exhibit. The network administrator wants to minimize the number of entries in Router1’s routing table. What should the administrator implement on the network?
CIDR

A router has a summary route to network 192.168.32.0/20 installed in its routing table. What range of networks are summarized by this route?
192.168.32.0 – 192.168.47.0/24

A network administrator is tasked with dividing up a class C network among the QA, Sales, and Administration departments. The QA department is made up of 10 people, the Sales is made up of 28 people, and the Administration has 6. Which two subnets masks adequately address the QA and Sales departments? (Choose two.)
255.255.255.224 for Sales
255.255.255.240 for QA

In the network shown in the graphic, three bits were borrowed from the host portion of a Class C address. How many valid host addresses will be unused on the three point-to-point links combined if VLSM is not used?
84

A Class C address has been assigned for use in the network shown in the graphic. Using VLSM, which bit mask should be used to provide for the number of host addresses required on Router A, while wasting the fewest addresses?
/27

An additional subnet is required for a new Ethernet link between Router1 and Router2 as shown in the diagram. Which of the following subnet addresses can be configured in this network to provide a maximum of 14 useable addresses for this link while wasting the fewest addresses?
192.1.1.224/28

Which three interior routing protocols support VLSM? (Choose three.)
OSPF
RIP v2
EIGRP

Refer to the exhibit. The number of required host addresses for each subnet in a network is listed in the exhibit. This number includes the host address requirements for all router ports and hosts on that subnet. After all device and router port address assignments are determined, what will be the total number of unused host addresses available?
29

Refer to the exhibit. In the network that is shown, the router interfaces are assigned the first address in each subnet. Which IP address would be usable for a host on one of the LANs in this network?
192.168.2.130/25

Refer to the exhibit. Which address is a broadcast address for one of the subnets that are shown in the exhibit?
192.168.4.15/29

Refer to the exhibit. A network administrator needs to create two subnetworks from 10.0.0.0/8 for a router running RIPv2. The Admin subnet requires 120 hosts and the Sales subnet requires 58 hosts. The network administrator assigned 10.0.1.128/25 to the Admin subnet. The Sales subnet is given 10.0.1.192/26. What will be the result of this addressing scheme?
Because RIPv2 does not support VLSM, the subnet masks will not be allowed.
The subnets overlap and will be rejected by the router.

Refer to the exhibit. A network technician enters the static route in R1 needed to reach network 10.1.1.0/24. A ping from the S0/0/0 interface on R1 to host B fails. The technician begins testing the network and has the following results:
1. pings from R1 to the S0/0/0 interface on R2....successful
2. pings from R1 to the Fa0/0 interface on R2....successful
3. pings from host B to hosts on the 10.1.1.0/24 network....successful
4. pings from host B to the Fa0/0 interface on R2....successful
5. pings from R2 to host B....successful.
The default gateway on host B is not correctly set.

What is a supernet?
a summarization of classful addresses

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