03.Net-Admin.pdf

Network Administration

Hamish Whittal

Network Administration

by Hamish Whittal

Published 2005-01-25 19:35:56

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Table of Contents

1. Network Administration Fundamentals ...................................................1

Introducing the TCP/IP Model ............................................................1

The Physical Layer ....................................................................1

The MAC Layer ........................................................................2

The Network Layer ....................................................................2

The Transport Layer ..................................................................2

The Application Layer ...............................................................2

The OSI Model ..................................................................................3

Relating the TCP and OSI Models ......................................................4

Overview of how the TCP/IP Model Works ........................................5

A deeper look at the TCP protocol layers ....................................6

Network Layer and Understanding IP addressing .........................8

Choosing the Class of network that you will use ........................12

Why use sub-netting ................................................................12

Summary - TCP/IP Stack .........................................................15

Transferring information across the Internet ..............................16

Test the network with Ping .......................................................16

Creating and using the ARP table .............................................17

Explaining routers ...................................................................17

Briefly on LAN 's and WAN's ..................................................20

How to put an IP address onto your network card ..............................20

Exercise: .................................................................................21

Lets look at ping from the TCP/IP Stack point of view ...............22

Packets, frames, bytes, octets and datagrams .....................................23

The network interfaces that you'll see if you run ifconfig -a ................24

Setting up multiple cards in one machine ..........................................24

Logical and physical networks ..........................................................25

Plumbing a device ...........................................................................25

Routing and using the "netstat" command .........................................26

Wrap-up ..........................................................................................28

CIDR ......................................................................................28

Further Troubleshooting with ping and arp ................................28

2. Client/Server Technology .....................................................................31

Client / Server enhancing Performance ..............................................31

Client / Server enhancing Scalability .................................................31

Client / Server enhancing Flexibility .................................................31

Client / Server offers Interoperability ................................................32

First Example: .........................................................................32

Second example: .....................................................................32

Central Control ........................................................................32

Third example: ........................................................................32

Fourth example: ......................................................................33

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