ities make it possible for existing 10BaseT applications
and management tools to be used on Fast Ethernet net-
works. Fast Ethernet is based on an extension of IEEE
802.3 specification (IEEE 802.3u). Compare with:
Ethernet. See also: 100BaseT, 100BaseTX, and IEEE.
Contrast with: process switching.
assigned bandwidth on one wire based on frequency.
See also: TDM, ATDM, and statistical multiplexing.
up to 200Mbps and uses token-passing media access
on fiber-optic cable. For redundancy, FDDI can use a
dual-ring architecture.
DTE receptor that congestion was encountered along
the path from source to destination. A device receiving
frames with the FECN bit set can ask higher-priority
protocols to take flow-control action as needed. See
also: BECN.
porting up to two 100Mbps 100BaseT ports.
Every time the routing information changes, the
changes are propagated to the FIB.
made up of a router or access server or several routers
or access servers, that uses access lists and other meth-
ods to ensure the security of the private network.
IOS in a router by default.
storage that can be erased electronically and repro-
grammed, physically located on an EEPROM chip.
Flash memory permits software images to be stored,
switches use flash memory to hold the IOS by default.
See also: EPROM, EEPROM.
device with exception of the interface from which the
traffic originated. This technique can be used for traf-
fic transfer by bridges and switches throughout the
network.
sending devices. Pacing, as it is called in IBM net-
works, means that when buffers at a receiving unit are
full, a message is transmitted to the sending unit to
temporarily halt transmissions until all the data in the
receiving buffer has been processed and the buffer is
again ready for action.
Relay WAN. See also: Cisco FRAD, FRAS.
does not necessarily indicate an error and can be inten-
tional. See also: fragmentation.
data over an intermediate network medium that can-
not support the larger packet size.
not occur. Sometimes called modified cut-through.
term often refers to the header and trailer, employed
for synchronization and error control, that surround
the data contained in the unit.
that guarantees data delivery). Frame Relay is an indus-
try-standard, shared-access, best-effort, switched Data-
Link layer encapsulation that services multiple virtual
circuits and protocols between connected mechanisms.