Internet Assigned Numbers Authority. This international organization is responsible for maintaining records of all well-known numbers associated with the Internet Protocol. This includes, for example, all IP addresses, all registered TCP and UDP port numbers, and all Autonomous System numbers.
Interior Border Gateway Protocol. ASBR devices use this part of the BGP protocol to communicate with other ASBR devices within the same Autonomous System.
Internet Control Message Protocol. A core part of the IP protocol used primarily for management and reporting network error conditions. ICMP plays a crucial role in allowing TCP protocols to adapt to MTU and congestion problems.
Institute of Electrical and Electronics Engineers. The IEEE is an international standards body that develops and publishes standards for many things. Of particular interest for this book are the LAN standards embodied in the set of documents in the 802 series.
Internet Engineering Task Force. An organization consisting of many diverse groups whose mandate is the ongoing development and publication of Internet standards.
Internet Group Management Protocol. IGMP is the protocol used by devices taking part in IP multicast applications to allow them to join and leave multicast groups.
Interior Gateway Protocol. An Interior Gateway Protocol is a dynamic routing protocol that operates within a single Autonomous System.
Interior Gateway Routing Protocol. IGRP is a proprietary Interior Gateway Protocol developed by Cisco. It has been updated and effectively replaced by the more flexible and modern EIGRP protocol, also a Cisco proprietary protocol.
Management or control information that is transmitted using the same physical and logical network pathways such as those used by application data.
Also called intserv, a Quality of Service mechanism for TCP/IP. It is intended to offer a mechanism for giving specific applications guaranteed reserved bandwidth. It is normally used in conjunction with a bandwidth-reservation protocol such as RSVP.
In Token Ring and Ethernet networks, as well as other networks, the Inter-Frame Gap is the time a device must wait after sending one frame and before sending the next.
See IGP.
Either the Public Internet or any private network of devices that use the Internet Protocol.
See ICMP.
See IETF
See Integrated Services.
See IP.
A device that has at least one LAN port and several low-speed RS-232 serial ports. These serial ports can be connected to various devices to access serial-based applications. Then it is possible to use the TCP/IP Telnet protocol to make an IP connection to these serial-attached devices, emulating a direct terminal connection. This connection device can be useful for legacy serial applications and for many network management applications.
Internetwork Operating System. In Cisco routers, the IOS software runs the device.
Internet Protocol. Sometimes called TCP/IP, this a popular Layer 3 protocol. Its popularity is largely due to the growth of the public Internet.
Internet Protocol Security. This set of protocols is used to provide additional security to the IP protocol suite.
Internet Protocol Version 4. This is the current common standard for IP. The extra information is usually provided in this form to distinguish the existing standard from the newer IPv6 standard.
Internet Protocol Version 6. This updated version of the IP protocol suite provides many enhancements over the existing version, IPv4. One of the most visible differences is the vastly expanded address space available in IPv6.
Internetwork Packet Exchange. This protocol was developed by Novell for its NetWare NOS. It is a routable Layer 3 protocol that shares several similarities with IP.
Inter-Switch Link. ISL is a Cisco proprietary standard for VLAN trunks.
International Organization for Standardization. The ISO is an international organization that develops and publishes standards relevant to many industries, including networking. The commonly used OSI model for network protocol is one of the ISO's many contributions to networking.