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CISA® Certified Information Systems Auditor®: Study Guide, Third Edition by David Cannon

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Using Network Services

Several pages ago, we discussed the OSI model with examples of network services running on layer 7. In the example, we mentioned network servers with a few of the services they provide. Let’s discuss two common network support services that relate to everyone using a network: DNS and DHCP.

note.eps

You will also need a firewall to protect your network. We discuss firewalls in depth in Chapter 7.

Domain Name System

Computers like to use binary numbers, network administrators like to use IP addresses, and all of us who run computers like to refer to machines by name. Names are so much easier to remember. Even names can get confusing, ...

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