Essay 16
Local Area Networks
Marshall D. Abrams and Harold J. Podell
Local area network (LAN) communications security is addressed in this essay. LANs are introduced as providing: (1) a private communications facility, (2) services over a relatively limited geographic area, (3) a high data rate for computer communications, and (4) common access to a wide range of devices and services. Security issues pertinent to LANs are discussed. For example, LANs share many security problems and approaches for their solutions with point-to-point conventional communications systems. In addition, LANs have some unique problems of their own: (1) universal data availability, (2) passive and active wiretap threats, (3) end-to-end access control, and (4) security group control. Countermeasures include physical protection, and separation by physical, logical, and encryption methods. Trusted Network Interface Units, encryption, and key distribution are also discussed. Examples are discussed to......
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Approximate Word Count: 7135
Approximate Pages: 28 (260 words per double-spaced page) |