IP Addressing Ques (Answer urself )

1. A router can determine that an IP address is part of a Class B network
by examining the first two bits in the IP address. What are the first two
bits for a Class B network?

A. 00
B. 01
C. 10
D. 11

2. What does an IP address of 127.0.0.1 indicate?

A. A local broadcast
B. A directed multicast
C. The local network
D. A local loopback

3. Which of the following subnet masks will support 50 IP addresses?


A. 255.255.255.240
B. 255.255.255.0
C. 255.255.255.192
D. 255.255.255.224

4. VLSM is compatible with which of the following routing protocols?
(Choose all that apply.)

A. RIPv1
B. RIPv2
C. IGRP
D. EIGRP

5. Which of the following best describes route summarization?

A. A router’s ability to take a group of subnetworks and summarize
them as one network advertisement
B. The Cisco IOS feature that permits serial interfaces to borrow an
IP address from another specified interface
C. The ability to tunnel IP address information inside an AURP
encapsulated frame
D. EIGRP’s ability to isolate discontiguous route advertisements from
one AS to another

6. Which of the following best summarizes the networks 172.16.100.0/24
and 172.16.106.0/24?

A. 172.16.0.0/24
B. 172.16.100.0/20
C. 172.16.106.0/20
D. 172.16.96.0/20

7. Which of the following is a good design practice for implementing
route summarization?

A. Use primarily with discontiguous networks.
B. Use primarily with contiguous networks.
C. Do not use with VLSM.
D. Use with non-hierarchical addressing.

8. Which of the following router-configuration commands would you
use to disable automatic route summarization in an EIGRP
environment?

A. no summary
B. no auto-summary
C. no summary stub
D. no route-summary

9. Which of the following are caveats of Cisco’s IP unnumbered IOS feature?
(Choose all that apply.)

A. Does not work over HDLC networks.
B. Is not compatible with SNMP.
C. Does not work over X.25 networks.
D. You cannot ping an unnumbered interface.

10. If you have a subnet mask of 255.255.255.248, what is another way
of displaying this mask?

A. /17
B. /23
C. /27
D. /29

11. Given the VLSM address 172.16.1.8/30, what are the two IP
addresses in the range that may be assigned to hosts?

A. 172.16.1.8
B. 172.16.1.9
C. 172.16.1.10
D. 172.16.1.11

12. Given an IP address of 172.16.0.10/29, what is the network address?

A. 172.16.0.8
B. 172.16.0.9
C. 172.16.0.11
D. 172.16.0.12

13. Which of the following may be done to overcome problems associated
with discontiguous networks?

A. Use route summarization.
B. Use VLSM.
C. Use IP unnumbered.
D. Disable route summarization.

14. Which of the following IP addresses do Cisco routers use to designate
the default route?

A. 1.1.1.1
B. 0.0.0.0
C. 255.255.255.255
D. 127.0.0.1

15. If you decide not to use IP unnumbered on a serial link, to best preserve
IP addresses, what should your subnet mask be?

A. 255.255.255.255
B. 255.255.255.0
C. 255.255.255.252
D. 255.255.252.0

16. What are the two methods that are most commonly used to represent
an IP address?

A. Dotted-decimal
B. Octal
C. Binary
D. Hexadecimal