Note De Frais

1. Which of the following IP addresses fall into the CIDR block of 115.64.4.0/22?

o 115.64.8.32

o 115.64.7.64

o 115.64.6.255

o 115.64.3.255

o 115.64.5.128

o 115.64.12.128

2. What are some of the advantages of using a router to segment the network?

o Filtering can occur based on Layer 3 information

o Broadcasts are eliminated

o Broadcasts are not forwarded across the router

o Adding a router to the network decreases latency

3. Which statements describe the addressing scheme that is in use in the network?

o The subnet mask in use is 255.255.255.192

o The subnet mask in use is 255.255.255.128

o The IP address 172.16.1.25 can be assigned to hosts in vlan1

o The IP address 172.16.1.205 can be assigned to hosts in vlan1

o The LAN interface of the router is configured with one IP address

o The LAN interface of the router is configured with multiple IP addresses

4. R1 is unable to establish an OSPF neighbor relationship with R3. What are the possible reasons for this problem?

o All of the routers need to be configured for backbone Area 1.

o R1 and R2 are the DR and BDR, so OSPF will not establish neighbor adjacency with R3

o A static route has been configured from R1 to R3 and prevents the neighbor adjacency from being established

o The hello and dead interval timers are not set to the same values on R1 and R3

o EIGRP is also configured on these routers with a lower administrative distance

o R1 and R3 are configured in different areas

5. PC_1 is sending packets to the FTP server. Consider the packet as it leaves RouterA interface Fa0/0 towards RouterB. Fill in the Source MAC, Destination MAC, Source IP address, Destination IP address below.

o Source MAC = 0000.0c93.9999

o Destination MAC = 0000.0c89.3333

o Source IP address = 172.16.21.7

o Destination IP address = 172.16.34.250

6. What is the most appropriate summarization for these routes?

o 10.0.0.0/21

o 10.0.0.0/22

o 10.0.0.0/23

o 10.0.0.0/24

7. What are the characteristics of the OSPF routing protocol?

o It converges quickly

o OSPF is a classful routing protocol

o It uses cost to determine the best route

o It uses the DUAL algorithm to determine the best route

o OSPF routers send the complete routing table to all directly attached routers

o OSPF routers discover neighbors before exchanging routing information

8. What could be possible causes for the “Serial0/0 is down” interface status?

o A layer 1 problem exists

o The bandwidth is set too low

o A protocol mismatch exists

o An incorrect cable is being used

o There is an incorrect IP address on the Serial0/0 interface

9. Which IP address can be assigned to an Internet interface?

o 10.180.48.224

o 9.255.255.10

o 192.168.20.223

o 172.16.200.18

10. Host1 is trying to communicate with Host2. The e0 interface on RouterC is down. Which of the following are true?

o RouterC will use ICMP to inform Host1 that Host2 cannot be reached

o RouterC will use ICMP to inform RouterB that Host2 cannot be reached

o RouterC will use ICMP to inform Host1, RouterA, and RouterB that Host2 cannot be reached

o RouterC will send a Destination Unreachable message type

o RouterC will send a Router Selection message type

o RouterC will send a Source Quench message type

11. The networks connected to router R2 have been summarized as a 192.168.176.0/21 route and sent to R1. Which destination addresses will R1 forward to R2?

o 192.168.194.160

o 192.168.183.41

o 192.168.159.2

o 192.168.183.255

o 192.168.179.4

o 192.168.184.45

12. Which routing protocols will support the following IP addressing scheme?

Network1 – 192.168.10.0/26

Network2 – 192.168.10.64/27

Network3 – 192.168.10.128/30

o RIP version 1

o RIP version 2

o IGRP

o BGP

o OSPF

13. Which interfaces are access ports?

o Switch1

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