one direction. Half duplex transmits in two directions
but only one direction at a time. Full duplex transmits
both directions simultaneously.
This method places a buffer between the receiving
application and the network data flow. The "win-
dow" available for accepting data is the size of the
buffer minus the amount of data already there. This
window increases in size as the application reads data
from it and decreases as new data is sent. The receiver
sends the transmitter announcements of the current
window size, and it may stop accepting data until the
window increases above a certain threshold.
tions that supports only a single routed protocol, TCP/
IP. SLIP is the predecessor to PPP. See also: PPP.
technology offered by telephone companies that pro-
vides high speed.
services.
erence model but with several variations; created by
IBM in the 1970s and essentially composed of seven
layers.
Data transfer, connection management, and QoS
selection are three primary functions executed by the
SNAP frame.
and environmental data. This data can include device
temperature, name, performance statistics and much
more. SNMP works with MIB objects that are present
on the SNMP agent. This information is queried then
sent to the SNMP server.
cations. (2) In AppleTalk networks, an entity at a spe-
cific location within a node; AppleTalk sockets are
conceptually similar to TCP/IP ports.
media, developed at Bell Labs. It specifies a base signal
rate of 51.84Mbps and a set of multiples of that rate,
known as Optical Carrier levels, up to 2.5Gbps.
ing as governing agent for all CxBus activities.
a switched Ethernet environment by extending the mon-
itoring ability of the existing network analyzers into the
environment. At one switched segment, the SPAN mir-
rors traffic onto a predetermined SPAN port, while a net-
work analyzer connected to the SPAN port is able to
monitor traffic from any other Catalyst switched port.
statically configured spanning tree when searching for
paths in a source-route bridging network. See also: all-
routes explorer packet, explorer packet, and local
explorer packet.
connected into a loop, the bridge, or switch, cannot
identify a frame that has been forwarded previously,
so there is no mechanism for removing a frame as it
passes the interface numerous times. Without a
method of removing these frames, the bridges contin-
uously forward them--consuming bandwidth and
adding overhead to the network. Spanning trees prune
the network to provide only one path for any packet.
See also: Spanning-Tree Protocol and spanning tree
algorithm.