Introduction

Today, more than ever, the security of networks is a major consideration for network administrators. Notwithstanding the risks associated with the fact that most networks are now connected by some means to the Internet, security from a more local perspective is a big issue.

For a network administrator to fully understand the security risks associated with the network, he or she must take a holistic view and consider every aspect, threat, and possible weakness. The network administrator must assume that someone will attempt to gain unauthorized access to the network or the systems attached to it at some point. This might sound a little dramatic, but there are plenty of network administrators who can attest to the fact that it is a ...

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