Chapter 11

Understanding Network Security Zones

Security is an important consideration with any network. Some areas of a network are more vulnerable to attacks than other areas. This increased risk requires increased security. Different areas of a network are categorized in zones with varying levels of security required in different zones.

The Internet is the riskiest zone. Internal networks, or intranets, are the safest. Between these two, you can create perimeter networks as a buffer zone. One of the primary methods of separating the zones is with firewalls. This chapter covers these different zones and provides some information on firewalls in general and Microsoft firewalls in particular.

  • Understanding risks on the Internet
  • Exploring an ...

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