Frame filtering is a technique that
examines particular information about each frame. The concept of frame filtering is very similar to
that commonly used by routers. A filtering table is developed for each
switch, which provides a high level of administrative control because
it can examine many attributes of each frame. Depending on the
sophistication of the LAN switch, you can group users based on a
station's MAC addresses, network-layer protocol types, or application
types. Table entries are compared with the frames filtered by the
switch. The switch takes the appropriate action based on the entries.
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