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Glossary
The wrapping of data in a particular protocol header. For example, Ethernet data is wrapped in a
encapsulation
specific Ethernet header before network transit. Also, when bridging a dissimilar network, the entire
frame from one network is placed in the header used by the data link layer protocol of the other
network.
Erasable programmable read-only memory. Nonvolatile memory chips that are programmed after they
EPROM
are manufactured, and, if necessary, can be erased by some means and reprogrammed.
See EPROM.
erasable
programmable
read-only memory
A process used during file transfer to discover discrepancies between transmitted and received data.
error detection
Some file transfer programs only detect errors; others detect errors and attempt to fix them (called
error correction).
electrostatic discharge. Discharge of stored static electricity that can damage electronic equipment and
ESD
impair electrical circuitry, resulting in complete or intermittent failures.
Extended Superframe. A framing type that is used on T1 circuits that consists of 24 frames of 192 bits
ESF
each, with the 193rd bit providing timing and other functions.
One of the most common LAN wiring schemes, Ethernet has a transmission rate of 10 Mbps; a newer
Ethernet
standard called Fast Ethernet has a rate of 100 Mbps.
European Telecommunications Standards Institute. ETSI is a non-profit organization producing
ETSI
voluntary telecommunications standards used throughout Europe, some of which have been adopted
by the european community as the technical base for Directives or Regulations.
See ETSI.
European
Telecommunication
s Standards
Institute
Network message indicating operational irregularities in physical elements of a network or a response
event
to the occurrence of a significant task, typically the completion of a request for information. See also
alarm and trap.
See EFCI.
explicit forward
congestion
indication
See ESF.
Extended
Superframe
F
One of five categories of network management defined by ISO for management of OSI networks. Fault
fault management
management attempts to ensure that network faults are detected and controlled. See also accounting
management, configuration management, performance management, and security management.
Cisco 6260 Hardware Installation Guide
GL-14
OL-2365-02
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