This module introduced the needs, trends, and goals of network security. The
exponential growth of networking has lead to increased security risks. Many of
these risks are due to hacking, device vulnerabilities, as well as improper
uses of network resources. Awareness of the various weaknesses and
vulnerabilities is critical to the success of modern networks. Security
professionals who can deploy secure networks are in high demand.
The four
primary threats to network security include unstructured threats, structured
threats, external threats, and internal threats. In order to defend against
threats, an understanding of the common methods of attack must be established,
including reconnaissance, access, denial of service, and malicious code.
Responses to security issues range from ignoring the problem to excessive
spending on security devices and solutions. Neither approach will be successful
without a good, sound policy and highly skilled security professionals.