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CCIE Routing and Switching Exam Certification Guide

  • Sample Chapter is provided courtesy of Cisco Press.
  • Date: Aug 16, 2002.

Contents

  1. Introduction
  2. Foundation Topics
  3. Transparent Bridging (TB)
  4. SRB
  5. LAN Switching Topics
  6. ATM LANE
  7. References Used
  8. Foundation Summary
  9. Media Specifications
  10. Process for a Station to Insert into the Token Ring
  11. Transparent Bridge Functions
  12. Transparent Bridge Port States
  13. STP
  14. CRB
  15. RIF
  16. VLAN Trunking
  17. FEC
  18. CDP
  19. LANE

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.

From the Book

CCIE Routing and Switching Exam Certification Guide

CCIE Routing and Switching Exam Certification Guide

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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.

12. Transparent Bridge Port States | Next Section Previous Section

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