HP ProCurve 7000dl Series Basic Management And Configuration Manual page 834

Appendix B: Glossary
FECN Forward Explicit Congestion Notification. The DTE sending data can set this
Fiber Optics An optical transmission medium consisting of thin, plastic or glass strands
Fiber Optic
Carrier Network
Field A space allocated in a protocol header or packet for a particular item of
FIFO First In First Out. A queuing method that sends packets over a line strictly
Firewall A security device that establishes a barrier between a trusted and an untrusted
Flash A solid-state electronic memory device that does not lose information when
FQDN Fully-Qualified Domain Name. An FQDN is a domain name that includes both
FRAD Frame Relay Assembler/Disassembler. A generic name for a device that
B-20
bit to indicate that the network is experiencing congestion and the destination
DTE should stop sending so many requests for data. See also Frame Relay
and BECN.
that reflect light pulses within their interior core all along their length. Fiber
optics can provide a great deal of bandwidth.
A network that supports fiber optic voice and data transmission.
information.
according to the order in which they were received. FIFO does not require the
receiver to reassemble out-of-order packets because packets always arrive in
order.
network. The firewall contains designated network traffic within a specified
area and protects the interior network from unauthorized traffic. Depending
on its type, the firewall may screen packets at the Network, Session, or
Application Layer, or some combination of these layers. For example, a
firewall can be programmed to drop certain kinds of external traffic destined
to the private network or to monitor TCP sessions and ensure that they are
legitimate.
no longer connected to a power source.
a hostname and domain name. For example, www.ProCurve.com is a fully-
qualified domain name. The hostname is www, and ProCurve is the domain
name within the top-level domain, com.
encapsulates packets in Frame Relay headers to prepare them for transmis-
sion across a Frame Relay network. (The device also decapsulates incoming
packets.) The router or other DTE that connects to the Frame Relay network
usually includes the FRAD.