  Local Area Networks(LAN) at present become an important instrument for
organizing of process and information communication in an organization. They
provides important purposes such as association of large amount of data,
hardware and software resources and expanding of optimum communications. Becase
these network do work with valuable information, the problem of security
providing is an important issue in organization. So, the stablishment of an
information security management system(ISMS) in organization is significant. In
this paper, we introduce ISMS and its implementation in LAN scop. The assets of
LAN and threats and vulnerabilities of these assets are identified, the risks
are evaluated and techniques to reduce them and at result security
establishment of the network is expressed.
