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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