Ethernet Technologies:

This module covers the growth and expansion of Ethernet technologies from the earliest form of 10BASE2 and 10BASE5 Ethernet to 100BASE-T, 1000BASE-LX and 10GbE Ethernet implementations.

Vocabulary - Key Terms:

Manchester encoding- uses the transition in the middle for the timing window to determine the binary value for that bit period.

Non-Return-to-Zero encoding - relies on the level of the signal in the timing window to determine the binary value for that bit period.

Non-Return-to-Zero-Inverted encoding - relies on the presence or absence of a transition in the middle of the timing window to determine the binary value for that bit period.

MLT-3 - the signal level alternates between above and below the zero level instead of using only two levels.

- Manchester Coding - Form of encoding used in 10 Mbps systems






Related Articles:
Asynchronous Transfer Mode: ATM
Synchronous Optical Network: Sonnet
Multi Level -3 Encoding
Non-Return-to-Zero


Key Concepts:

The 5-4-3 for 10-Mbps Ethernet

5 - Segments
4 - Repeaters
3 - Populated Segments


Course Materials:

CCNA1- Module 7 - Study Guide (.pdf)