Local Area High Speed Networks

Summary Points

• A collision domain obeys the 5-4-3 rule: Every path contains at most five segments, four repeaters, and three populated segments.

For coaxial cable LANs

• The original baseband Ethernet LAN defined in the 1980s was built from sections of thick, heavy 50-ohm coaxial cable.

• Only one signal can be on a cable at any given time.

• Stations attach to the medium via attachment unit interface (AUI) cables and transceivers.

• Transceivers send and receive, send jams, control jabber, and detect collisions.

• SQE signals are used to report the completion of a frame transmission, a collision, or improper pulses on the cable.

• Thin (10BASE2) coax is cheaper and easier to work with than thick coax.

• A thin coax segment has a daisy chain structure.

• Systems connect ...