Fluke Series II User Manual page 117

OneTouch Series II
Users Manual
CSMA/CD (Carrier Sense, Multiple Access with
Collision Detection)
In CSMA/CD, each node or station has equal access to
the network. Before transmitting, each station waits until
the network is not busy. Since each node has equal
access to the network, a collision (two stations
transmitting at the same time) can occur. If a collision
occurs, the affected nodes will wait a random time to
retransmit. Ethernet uses the CSMA/CD access method.
dBm
Decibels below 1 mW (1 milliwatt). The logarithmic
measure of the ratio of the output power of a signal to an
input signal of 1 mW.
DECnet
Digital Equipment Corporation's set of communication
protocols for networking computers.
Destination Address
The address of the station receiving a frame.
EIA568
Electronic Industries Association Commercial Building
Telecommunications Wiring Standard. Specifies
maximum cable lengths, installation practices, and
performance specifications for generic building wiring.
D-4
Encapsulation
Encapsulation is the method of placing one protocol into
another protocol's format. For example, in a Novell
Ethernet environment there are four different methods to
encapsulate IPX in Ethernet/802.3 frames: 802.3 raw,
802.2, Ethernet II, and SNAP.
Ethernet
Ethernet is a 10 Mbps topology that runs over thick coax,
thin coax, twisted-pair, and fiber-optic cabling systems.
Fast Ethernet
Industry standard terminology for 100Base-T. Industry
groups do not agree on using the term to refer to 100VG-
AnyLAN; some call 100VG-AnyLAN a Fast Ethernet
technology while others do not.
FCS (Frame Check Sequence)
A field transmitted in LAN frames that encodes error
checking information.
Frame
A frame is the transmission unit on a network. In Token
Ring, a frame is the token joined with node data.