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TCP/IP Protocol Suite

Behrouz A. Forouzan

Chapter 8

Address Resolution Protocol (ARP) - all with Video Answers

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Chapter Questions

Problem 1

$$
\text { Is the size of the ARP packet fixed? Explain. }
$$

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Problem 2

What is the size of an ARP packet when the protocol is IP and the hardware is Ethernet?

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Problem 3

What is the size of an Ethernet frame carrying an ARP packet?

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Problem 4

What is the broadcast address for Ethernet?

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01:49

Problem 5

A router with IP address 125.45 .23 .12 and Ethernet physical address 23:45:AB:4F:67:CD has received a packet for a host destination with IP address 125.11.78.10 and Ethernet physical address $\mathrm{AA}: \mathrm{BB}: \mathrm{A2}: 4 \mathrm{~F}: 67: \mathrm{CD}$.
a. Show the entries in the ARP request packet sent by the router. Assume no subnetting.
b. Show the entries in the ARP packet sent in response to part a.
c. Encapsulate the packet made in part a in a data link frame. Fill in all the fields.
d. Encapsulate the packet part b in a data link frame. Fill in all the fields.

James Kiss
James Kiss
Numerade Educator
01:49

Problem 6

A router with IP address 195.5 .2 .12 and Ethernet physical address AA: $25: A B: 1 F: 67: C D$ has received a packet for a destination with IP address 185.11.78.10. When the router checks its routing table, it finds out the packet should be delivered to a router with IP address 195.5.2.6 and Ethernet physical address $\mathrm{AD}: 34: 5 \mathrm{D}: 4 \mathrm{~F}: 67: \mathrm{CD}$.
a. Show the entries in the ARP request packet sent by the router. Assume no subnetting.
b. Show the entries in the ARP packet sent in response to part a.
c. Encapsulate the packet made in part a in the data link layer. Fill in all the fields.
d. Encapsulate the packet made in part b in a data link frame. Fill in all the fields.

James Kiss
James Kiss
Numerade Educator

Problem 7

Show the contents of ATMARP inverse packets exchanged between two routers that have a PVC connection. The IP addresses are 172.14.20.16/16 and $180.25 .23 .14 / 24$. Choose two arbitrary 20 -byte physical addresses. Use hexadecimal values in filling the fields.

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01:49

Problem 8

Show the contents of ATMARP packets (request and reply) exchanged between a router and a server. The IP address of the router is $14.56 .12 .8 / 16$ and the IP address of the server is $200.23 .54 .8 / 24$. Choose two arbitrary 20-byte physical addresses. Use hexadecimal values in filling the fields.

James Kiss
James Kiss
Numerade Educator

Problem 9

Add IP addresses for the routers in Figure 8.12. Note that the prefix in each LIS must be the same, but it must be different for the two LISs. Note also that the routers that belong to two LISs must have two IP addresses.

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00:55

Problem 10

An ATMARP packet must also be carried in cells. How many cells are needed to carry an ATMARP packet discussed in this chapter?

Hast Aggarwal
Hast Aggarwal
Numerade Educator