Networking Basics. Networking Fundamentals Series
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1 Networking Basics Networking Fundamentals Series
2 Copyright Information Copyright 2012 INE, Inc. All rights reserved. This publication,, was developed by INE, Inc. All rights reserved. No part of this publication may be reproduced or distributed in any form or by any means without prior written permission from INE, Inc. Cisco, Cisco Systems, the Cisco logo, and CCIE are registered trademarks of Cisco Systems, Inc. and/or its affiliates in the United States and certain other countries. All other products and company names mentioned in this publication are the trademarks, registered trademarks, or service marks of their respective owners. Throughout this publication, the authors have used their best efforts to distinguish proprietary trademarks from descriptive names by following the capitalization styles used by the manufacturer. i
3 Disclaimer This publication,, is designed to assist you in your understanding and application of networking fundamentals. The enclosed material is presented to you on an as is basis. Neither the authors nor INE, Inc. assume any liability or responsibility to any person or entity with respect to loss or damages incurred by using the information contained in this publication. This publication was developed by INE, Inc. and is an original work of the aforementioned editor and contributors. Any similarities between material presented in this guide any third-party material is completely coincidental. ii
4 Table of Contents Identify the Networking Models Identify the Layers of the OSI Model Identify the Cable Types Identify the Address Classes Subnet According to the Given Requirements... 5 Answer Key Identify the Networking Models Identify the Layers of the OSI Model Identify the Cable Types Identify the Address Classes Subnet According to the Given Requirements iii
5 iv
6 1.1 Identify the Networking Models Identify the networking models shown in the following two diagrams. Model: Model: 1
7 1.2 Identify the Layers of the OSI Model In the table on the left, fill in each layer of the OSI model. Then draw a line between each layer on the left and the device on the right that typically operates that layer. 2
8 1.3 Identify the Cable Types Identify the following cable types. 3
9 1.4 Identify the Address Classes Identify the address class, or address type, in the following list. 4
10 1.5 Subnet According to the Given Requirements Using the address space provided, allocate a scalable address space to the network topology provided. 5
11 1.6 Identify the Traffic For this task, you must download and install the Wireshark application from 1. Capture a connection to Open the stream and view the three-way handshake. Note the sequence numbers that are being used. Are these sequence numbers the real sequence numbers or the relative sequence numbers? a. REAL b. RELATIVE 2. Disable the relative sequence numbers and view your changes. 3. Restart your Wireshark capture to view an ARP session. 4. Open a command prompt and view your IP address, default gateway, and DNS server using the ipconfig command. 5. Clear the ARP cache using the arp d command. 6. Ping your default gateway. 7. View the ARP session in Wireshark. 8. Create another capture that will display a DNS resolution. View the resolution in the Wireshark interface. 6
12 Answer Key 1.1 Identify the Networking Models Identify the networking models shown in the following two diagrams. Model: Peer-to-Peer Networking Model: Client/Server Networking 7
13 1.2 Identify the Layers of the OSI Model In the table on the left, fill in each layer of the OSI model. Then draw a line between each layer on the left and the device on the right that typically operates that layer. 8
14 1.3 Identify the Cable Types Identify the following cable types. 9
15 1.4 Identify the Address Classes Identify the address class, or address type, in the following list. 10
16 1.5 Subnet According to the Given Requirements Using the address space provided, allocate a scalable address space to the network topology provided. 11
17 1.6 Identify the Traffic For this task, you must download and install the Wireshark application from 1. Capture a connection to Open the stream and view the three-way handshake. Note the sequence numbers that are being used. Are these sequence numbers the real sequence numbers or the relative sequence numbers? a. REAL b. RELATIVE 2. Disable the relative sequence numbers and view your changes. 3. Restart your Wireshark capture to view an ARP session. 4. Open a command prompt and view your IP address, default gateway, and DNS server using the ipconfig command. 5. Clear the ARP cache using the arp d command. 6. Ping your default gateway. 7. View the ARP session in Wireshark. 8. Create another capture that will display a DNS resolution. View the resolution in the Wireshark interface. The steps in this task were demonstrated in the video course, so no solution is provided here. Use this task as a personal practice session to familiarize yourself with Wireshark and decoding packet captures. 12
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