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Chapter 11
Network Maintenance
Ruth Watson
Operating Systems Concepts 1/e
Ruth Watson
Chapter 11
Objectives (1 of 2)

Explain the importance of a Disaster
Recovery Plan

Describe a backup rotation scheme

Demonstrate how to boot a computer into
safe mode

Explain the role of services

Explain the role of service packs
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Objectives (2 of 2)

Explain the difference between a static and
a dynamic IP address

Explain what the DHCP service does

Demonstrate how to use TCP/IP
troubleshooting tools


PING and TRACERT
Explain what the DNS service does
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Introduction

Maintaining the network is the primary
role of a Network Administrator

Troubleshooting and monitoring
resources is key
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Important Terms to Understand

APIPA

NETSTAT

DoS attack

PING

DHCP

TCP/IP

IANA

TRACERT

IPCONFIG
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Tricks of the Trade - Server Backups

Disaster Recover Plan

Outlines a procedure in
the event of a network
failure

Weekly Backups

Daily incremental
backups
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Tricks of the Trade - Services
Manual
Automatic
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Tricks of the Trade - Service Packs
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Tricks of the Trade - Miscellaneous

Monitor processes

Use the task Manager

Install Anti-Virus

Update Anti-Virus

Install Utilities
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Configuring and Testing IP Addresses
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Computers must be
configured to access the
Internet

A unique IP address must be
assigned to every device on
the Internet

A Network Administrator
must configure computers to
use the IP addresses
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Static IP Addresses

Assigning IP addresses
statically is the hard way

Network Administrators
must key in:
Operating Systems Concepts 1/e
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The IP Address

The Subnet Mask

The default Gateway

The DNS
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Dynamic IP Addresses

Letting the operating system
automatically configure IP
addresses is much easier

The dynamic host
configuration protocol
(DHCP) service allows you to
enter a range of IP
addresses to obtain
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Troubleshoot IP Problems - IPCONFIG

IPCONFIG:

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Type at command prompt
or at Run to determine
your IP address
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Troubleshoot IP Problems - APIPA

APIPA:

Automatic private IP
addressing

Enables clients to
communicate on a LAN
without Internet access
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Troubleshoot IP Problems - Ping
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Ping

If you cannot access the Internet, try a Ping
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When you Ping, you send something like an echo to the address
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The echo travels there and back
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If you do not get a reply, something is wrong with the NIC card or
TCP/IUP stack
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DNS Problems - TRACERT
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TRACERT
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Trace Route Utility
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Bounces and echo to
the destination
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Shows every router
along the way
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DNS Problems - Hostname

HOSTNAME

Gives you information about
yourself

Tells you the host name of the
computer you are running
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DNS Problems - NETSTAT

NETSTAT

Lets you know what
communication ports on
your computer are in use
and who is using them

Communication ports
range from 0 – to 1024

Ports 135 and 139 are
used by Windows
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Summary




Maintaining a network takes a lot of work and time.
Maintenance includes:
 Backup schedules
 Repairs
 Services
 Downloading
 Installing
 Troubleshooting
Try to troubleshoot connections problems via:
 PING and TRACERT
Check current IP address via:
 IPCONFIG
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Questions?
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