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CCIE Routing and Switching Exam Certification Guide

Chapter Description

Prepare for the CCIE Routing and Switching Exam with this excellent study resource. Review such topics as MAC address format, VLAN trunking, transparent bridge functions, and much more.

Transparent Bridge Functions

Transparent bridges have three primary functions:

  • To learn the MAC addresses of all nodes and their associated port

  • To filter incoming frames whose destination MAC addresses are located on the same incoming port

  • To forward incoming frames to the destination MAC through their associated port@

Table 4-16 WLAN Modes

WLAN Mode

Description

Basic Service Set (BSS)

Also known as Infrastructure mode; there is one Access Point.

Independent Basic Service Set (IBSS)

Also known as Ad-hoc mode; there is no Access Point.

Extended Service Set

There is more than one Access Point.


Table 4-17 Transparent Bridge Modes

Bridge Mode

Description

Store-and-Forward

Stores the entire frame and verifies the CRC before forwarding the frame. If a CRC error is detected, the frame is discarded.

Cut-Through

Forwards the frame just after it reads the destination MAC address without performing a CRC check.


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