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Metro Ethernet by Sam Halabi

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I
incumbent local exchange carrier (ILEC).

Traditional telephony company.

interexchange carrier (IXC).

Common carrier that provides long-distance connectivity between dialing areas serviced by a single local telephone company.

interface.

In routing or transport terminology, a network connection or a port.

Interior Gateway Protocol (IGP).

Internet protocol used to exchange routing information within an autonomous system. Examples of common Internet IGPs include IGRP, OSPF, and RIP.

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