CCNA Cisco Certified Network Associate Study Guide - FTP Server

Glossary 681
hubs Physical-layer devices that are really just multiple port repeaters.
When an electronic digital signal is received on a port, the signal is reamplified
or regenerated and forwarded out all segments except the segment from
which the signal was received.
ICD International Code Designator: Adapted from the subnetwork model
of addressing, this assigns the mapping of Network layer addresses to ATM
addresses. HSSI is one of two ATM formats for addressing created by the
ATM Forum to be utilized with private networks. See also: DCC.
ICMP Internet Control Message Protocol: Documented in RFC 792, it is a
Network layer Internet protocol for the purpose of reporting errors and providing
information pertinent to IP packet procedures.
IEEE Institute of Electrical and Electronics Engineers: A professional organization
that, among other activities, defines standards in a number of fields
within computing and electronics, including networking and communications.
IEEE standards are the predominant LAN standards used today
throughout the industry. Many protocols are commonly known by the reference
number of the corresponding IEEE standard.
IEEE 802.1 The IEEE committee specification that defines the bridging
group. The specification for STP (Spanning-Tree Protocol) is IEEE 802.1d.
The STP uses SPA (spanning-tree algorithm) to find and prevent network
loops in bridged networks. The specification for VLAN trunking is IEEE
802.1q.
IEEE 802.3 The IEEE committee specification that defines the Ethernet
group, specifically the original 10Mbps standard. Ethernet is a LAN protocol
that specifies Physical layer and MAC sublayer media access. IEEE
802.3 uses CSMA/CD to provide access for many devices on the same network.
FastEthernet is defined as 802.3u, and Gigabit Ethernet is defined as
802.3q. See also: CSMA/CD.
IEEE 802.5 IEEE committee that defines Token Ring media access.
IGMP Internet Group Management Protocol: Employed by IP hosts, the
protocol that reports their multicast group memberships to an adjacent multicast
router.