A LAN standard originally developed by Xerox

originally developed by IBM, uses a logical ring topology

LAN protocol standard by ANSI and

ITU-T

Designed to handle the transfer of data using either

asynchronous modem links or high-speed synchronous leased lines

Used as the packet switching protocol provided for use in a WAN

WAN protocol designed in response to X.25 deficiencies

a protocol for transferring cells

Hardware/software device capable of creating temporary

connections

Allows us to extend the physical length of a network

Operate in both the physical and the data link layers