Chapter 9. Security and Reliability


Security and reliability are two sides of the same coin. In the context of networking, they are the two qualities that determine the overall trustworthiness of a system to not stray outside of expected operational parameters, such as performance, stability, accuracy, and privacy. A system's security concerns its resistance to intentional harm, and reliability concerns a system's resistance to unintentional harm.

As an example of how security and reliability are intertwined, consider an authentication, authorization, and accounting (AAA) process on a server or router. This is primarily considered a security process, regulating who can log in to the machine, what tasks an authorized user can perform on it, and keeping a record of what each user does. However, AAA also contributes to reliability by preventing the wrong people from logging in, ensuring that authorized users do not inadvertently issue dangerous commands they are not qualified to use, and tracking what happened when mistakes do happen so that policies can be improved.

This chapter not only examines specific features of OSPF and IS-IS that can make the protocols more secure and reliable, but also shows how good design and good operational practice is essential for keeping your network up and running.




OSPF and IS-IS(c) Choosing an IGP for Large-Scale Networks
OSPF and IS-IS: Choosing an IGP for Large-Scale Networks: Choosing an IGP for Large-Scale Networks
ISBN: 0321168798
EAN: 2147483647
Year: 2006
Pages: 111
Authors: Jeff Doyle

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