Lab Assignments for Chapter 9

We have created one lab assignment for this chapter, Lab9-1. We have also included one lab report sheet, which means that each lab should be reported on a separate sheet. It is assumed that you have done the lab assignment for Chapter 1, which told you how to install the Wireshark software and how to use it.

The assignment is about an auxiliary protocol, ARP, which is part of the network layer, but it is used as a liaison between the network and the data-link layer.

9.1 ARP

As we discussed in the textbook, ARP is an auxiliary protocol that maps the IP address of the connection to the host or router to the link-layer address of that connection. In this lab, we trace and examine ARP packets

9.1.1 Assignment

Start your web browser and clear the browsers cache memory, but do not access any website yet.

Open the Wireshark and start capturing.

Go to your browser and retrieve any file from a website. Wireshark starts captur- ing packets.

In the filter field of the Wireshark window type arp (lowercase) and click Apply. Stop capturing and save the captured file.

Part I: ARP request message

From the packet list pane, select the first ARP request packet. From the packet detail pane, select the Address Resolution Protocol.

Questions

Using the hexdump and consulting Figure 9.8 in the textbook, answer the following question in your lab-report sheet.

1. From the hexdump, determine

a. the hardware type.

b. the protocol type.

c. the hardware length.

d. the protocol length.

e. the value of the operation field. What is the meaning of this field?

f. the source hardware address.

g. the source protocol address?

h. the destination hardware address.

i. the destination protocol address?

2. Using the packet detail pane, verify your answers to the first question.

3. What is the type of the destination hardware address (unicast, multicast, broad- cast)? Which hardware interface does the destination address define?

4. Checking the packet byte pane, you will notice that the ARP request is followed by zero-bytes. How many 0s are there? Explain the reason for the existence of these 0s.

Part II: ARP reply message

From the packet list pane, select the first ARP reply packet. From the packet detail pane, select the Address Resolution Protocol; the packets hexdump will be highlighted in the packet byte pane.

Questions

Using the hex dump answer the following question in your lab report sheet.

1. Using the hexdump, determine

a. the hardware type.

b. the protocol type.

c. the hardware length.

d. the protocol length.

e. the operation code.

f. the source hardware address.

g. the source protocol address?

h. the destination hardware address.

i. the destination protocol address?

2. Using the packet detail pane, verify your answers to the first question.

3. What Type of address is the destination hardware address? What network interface does the address define?

9.1.2 Lab 1 Report Sheet

9.1.3 Documents to Turn into D2L Dropbox

1. The Lab9 Lab 1 with answered questions in PDF or Word format.

2. Make sure to add a screenshot of the supporting captured ARP information.

Preview File Edit View Go Tools Window Help 79%)i Thu 6:08 PM myapple QE a Data Communications and Networking.pdf (page 287 of 1,269) Sort by: Search Rank Page Order Found on 10 pages Done Data Communications and Networkin.. Pag@ vii Introduction to Data-Link 1 match Layer 237 document Page xlill Chapter 9 Introduction to Data-Link Layer 237 1 match PART III DATA-LINK LAYER document document Page 237 237 1 match Figure 9.8 ARP packet 16 31 Page 682 237.18.6.88 d. 1 match Hardware: LAN or WAN protocol Protocol: Network-layer protocol Hardware Type Protocol Type Operation Request:1, Reply:2 Hardware Protocol Page 685 Pv6 addressing is discussed in RFCs 2375, 2. 1 match Source hardware address Source protocol address Destination hardware address (Empty in request) Destination protocol address Page 959 2 matches Using BER, show how we can. made of an INTEGER of value (2371), an OCTET.. Page 98o 1 match 111 16 11 10 16 24 40 51 61 12 Figure 9.9 Example 9.4 12... 1417222951878062 1822376566810910377 243. System A System B Pr