ATM ve Frame Relay

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WAN technologies such as frame relay and ATM were created to use existing telecommunications circuitry at a time when everything was based on, and needed to be compatible with, telephony technology. While these technologies are significantly slower than Ethernet, they provided data prioritization at a time when QoS was immature. Also, at the time, Ethernet was usually limited to 10 Mb

As speeds and technologies increased, long range Ethernet became possible and gradually replaced other WAN technologies.

ATM and frame relay are essentially obsolete technologies, although they are still used in some parts of the world that have been slower to upgrade to the latest speeds.

Ethernet'in aksine her iki protokol de broadcast değildir.