O'Reilly logo

Local Area High Speed Networks by Dr. Sidnie Feit

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Auto-Negotiation for Twisted-Pair Interfaces

Some of the vendors that built the first 10/100 twisted-pair Ethernet adapters and hubs created proprietary protocols that enabled link partners to negotiate and check whether both ends could operate at 100Mbps and whether both could operate in full-duplex mode.

Users wanted a standard negotiation protocol. The IEEE 802.3 committee acted quickly and published 802.3u, which was based on National Semiconductor's NWay negotiation method. IEEE Auto-Negotiation was defined as an optional feature of 10BASE-T, 100BASE-T4, and 100BASE-TX interfaces. It became a mandatory part of the 1000BASE-T and 1000BASE-X interfaces that were introduced later.

Twisted-pair Ethernet interfaces that support Auto-Negotiation ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required