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You can group users according to some shared characteristic, such as a common
business function or a common protocol. A single switch may have several
independent VLAN’s within it. Below is an example with an R&D, Manufacturing and
Administration department that has been partitioned into two different VLAN groups.
Members from the R&D group cannot directly talk to the Manufacturing group, but
they still share the same Server, Printer, Internet connection, or any other shared
devices that you would need.
5.2 Trunking Applications used with the switch:
Trunking allows you to increase the available bandwidth between switches by
grouping ports into a trunk. Trunks can also be used to connect servers to switches
for higher bandwidth pipes, or you can use trunking to improve the throughput
between different switches. Additionally trunking provides fail-over functionality.
When one of the links of a trunk has failed, the traffic originally going through that link
will be automatically re-directed to other links of the trunk, this gives the trunk
redundancy.