Cisco RJ-45-to-AUX Brochure page 400

Standard for inserting a frame tag VLAN identifier in the frame header. As a frame enters the
switching fabric, it is tagged with additional information regarding the VLAN properties. The tag
remains in the frame as it is forwarded between switches and is removed prior to exiting the access
link to the destination interface. This process is completely transparent to the end user.
Industry Standards Architecture (ISA)
The standard of the older, more common 8−bit and 16−bit bus and card architectures.
input/output (I/O)
Any operation in which data either enters a node or is sent out of a node.
Institute of Electrical and Electronics Engineers (IEEE)
A professional organization that develops standards for networking and communications.
Integrated Local Management Interface (ILMI)
A protocol created by the ATM forum to allow any ATM switch and ATM device to communicate
using SNMP.
Integrated Services Digital Network (ISDN)
An internationally adopted standard for end−to−end digital communications over PSTN that permits
telephone networks to carry data, voice, and other source traffic.
intelligent hub
A hub that contains some management or monitoring capability.
interface
A device, such as a card or a plug, that connects pieces of hardware with the computer so that
information can be moved from place to place (for example, between computers and printers, hard
disks, and other devices, or between two or more nodes on a network).
internal IPX address
A unique eight−digit number that is used to identify a server. It is usually generated at random when
the server is installed.
internal loopback address
Used for testing with TCP/IP. This address
127.0.0.1
allows a test packet to reflect back into the sending adapter to determine if it is functioning properly.
International Standards Organization (ISO)
A voluntary organization, founded in 1946, that is responsible for creating international standards in
many areas, including communications and computers.
Internet Assigned Numbers Authority (IANA)
The organization responsible for Internet protocol addresses, domain names, and protocol parameters.
Internet Control Message Protocol (ICMP)
Network−layer Internet protocol, documented in RFC 792, that reports errors and provides other
information relevant to IP packet processing.
Internet Engineering Task Force (IETF)
A group of research volunteers responsible for specifying the protocols used on the Internet and for
specifying the architecture of the Internet.
Internet Group Management Protocol (IGMP)
Protocol responsible for managing and reporting IP multicast group memberships.
Internet layer
In the TCP/IP architectural model, the layer responsible for the addressing, packaging, and routing
functions. Protocols operating at this layer of the model are responsible for encapsulating packets into
Internet datagrams. All necessary routing algorithms are run here.
Internet Network Information Center (InterNIC)
The group that provides Internet services, such as domain registration and information and directory
and database services.
Internet Protocol (IP)
Network−layer protocol, documented in RFC 791, that offers a connectionless internetwork service.
IP provides features for addressing, packet fragmentation and reassembly, type−of−service
specification, and security.
Internet Research Task Force (IRTF)
The research arm of the Internet Architecture Board. This group performs research in areas of Internet
protocols, applications, architecture, and technology.
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