Back to top



Institute of Electrical and Electronic Engineers
An international professional society issuing its own standards. The IEEE is a member of ANSI and ISO.


Internet Engineering Task Force
Body which was initially responsible for developing the specifications required for the interoperable implementation of IP.


The Internet Group Management Protocol (IGMP) is a communications protocol used by hosts and adjacent routers on IP networks to establish multicast group memberships. IGMP is an integral part of IP multicast.


The combined effect of resistance, inductance and capacitance on a transmitted signal. Impedance varies at different frequencies.


Internet Protocol
A networking protocol for providing a connectionless service to the higher transport protocol. It is responsible for discovering and maintaining topology information and for routing packets across homogeneous networks. Combined with TCP, it is commonly known as the TCP/IP platform.

IP Address

Also known as an Internet address. An IP address (Internet Protocol address) is a unique reference number used by devices attached to a network when sending information through a Local LAN, Wide area WAN or the Internet networks.

IP Telephony

The transmission of voice over an Internet Protocol (IP) network. Also called Voice over IP (VoIP), IP telephony allows users to make phone calls over the Internet, intranets, or private LANs and WANs that use the TCP/IP protocol.


International Standards Organization
An international organization involved in writing communications standards.


International Telecommunication Union
A European-based, international advisory committee recommending worldwide standards for transmission.