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1-18 About the Vanguard 342
Target Applications
LAN Segmentation
Introduction Traditional LAN segmentation allows grouping users and avoiding common
problem where packets are forwarded to LANs with no need for them. It allows also
isolating a secure area from a public one. When separate networks are needed or if a
network has reached its physical limitations, segmentation is used. Segmenting a
LAN can extend the network, reduce congestion, isolate network problems, and
improve security.
• Extend the Network - When the maximum physical limitations of a network
has been reached, routers may be added to create new segments to allow addi-
tional hosts onto the LAN.
• Reduce Congestion - As the number of hosts on a single network increases,
the bandwidth required also increases. Segmentation limits your segment to
traffic intended for your users.
• Isolate network problems - By dividing the network into smaller sections you
limit the amount of data and problems from other segments..
• Improve Security - By using segments a network can be isolated from outside
sources.
Figure 1-9. LAN Segmentation