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Term Denition
I
IAD
Integrated Access Device. Device that multiplexes varied communication technologies
onto a single telephone line for transmission to the carrier.
IC Integrated Circuit. Small electronic devices composed from semiconductor material.
ICMP
Internet Control Message Protocol. Allows the gateway or destination host to
communicate with the source host. For example, to report a processing error.
IDRP
Inter-Domain Routing Protocol. Species how routers communicate with different domain
routers.
IEEE
Institute of Electrical and Electronics Engineers. An engineering organization that
develops communications and networking standards.
IEEE 802.1d
Used in the Spanning Tree Protocol, IEEE 802.1d supports MAC bridging to avoid
network loops.
IEEE 802.1p Prioritizes network trafc at the data-link/MAC sub-layer.
EEE 802.1q
Defines the operation of VLAN Bridges that permit the definition, operation, and
administration of VLANs within Bridged LAN infrastructures.
IGMP
Internet Group Management Protocol. Allows hosts to notify their local switch or router
that they want to receive transmissions assigned to a specic multicast group.
IGP
Interior Gateway Protocol. Allows for routing information exchange between gateways in
an autonomous network.
Image File
System images are saved in two Flash sectors called images image 1 and image 2). The
active image stores the active copy; while the other image stores a second copy.
Ingress Port Ports on which network trafc is received.
IP
Internet Protocol. Specifies the format of packets and their addressing method.IP
addresses packets and forwards the packets to the correct port.
IP Address
Internet Protocol Address. A unique address assigned to a network device with two or
more interconnected LANs or WANs.
IPM
IP Multicast. Transmits multicast packets in a network. Multicast routing copies one
packet to several ports.
TPv6
IP Version 6. Provides a newer version of the Internet Protocol, and follows IP version
4 (IPv4). IPv6 increases the IP address size from 32 bits to 128 bits. In addition, IPv6
support more levels of addressing hierarchy, more addressable nodes, and supports
simpler auto-conguration of addresses.
IPX Internetwork Packet Exchange. Transmits connectionless communications.
ISIS
Intermediate System to Intermediate System. Provides Link State PDUs (LSPs)
authentication by including authentication information as part of the LSP.
J
Jumbo Frames
Enable transporting identical data in fewer frames. Jumbo Frames reduce overhead,
lower the processing time, and ensure fewer interruptions.
K
Key Chain
Group of MD5 keys assigned to an interface. Key chains are assigned to interfaces in the
RIP or OSPF interface parameters.
L