Introduction


Two important elements of a network security strategy are the use of proxy servers and firewall systems. A firewall system acts as a protective layer to network access by controlling the traffic that passes between the interfaces on a system. Proxy servers allow you to centralize access to the Internet and therefore provide a way to control and monitor network access.

In this chapter, we will also examine how other security measuressuch as port blocking, password policies, and encryptionfit into network security strategy. We also take a quick look at the purpose and characteristics of extranets and intranets.

The topics in this chapter focus on some of the logical aspects of network security, in contrast to the physical aspects. Although CompTIA does not specifically mention physical security in the Network+ objectives, you should still be aware of basic physical security measures such as controlling access to equipment and safeguarding backup tapes. You might not get asked directly about these things in the exam, but knowing the difference between physical and logical security measures might help you to better answer or interpret a question.




    Network+ Exam Cram 2
    Network+ Exam Cram 2
    ISBN: 078974905X
    EAN: N/A
    Year: 2003
    Pages: 194

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