PLANET WGSW-48040HP User Manual
Page 359
User’s Manual of WGSW-48040HP
C
CC
onym for
Continuity Check. It is a functionality that is able to detect loss of continuity in a network by
frames to a peer MEP.
CCM
onym for
Continuity Check M frame transmitted from a MEP to it's peer MEP and
used to implement functionality.
CDP
is an acronym for
Cisco Discovery Protocol.
D
DEI
nym for
Drop Eligible Indicator. It is a 1-bit field in the VLAN tag.
DES
DES is an acronym for
Data Encryption Standard. It provides a complete description of a mathematical algorithm for
encrypting (enciphering) and decrypting (deciphering) binary coded information.
Encrypting data converts it to an unintelligible form called cipher. Decrypting cipher converts the data back to its
original form called plaintext. The algorithm described in this standard specifies both enciphering and deciphering
operations which are based on a binary number called a key.
DHCP
DHCP is an acronym for
Dynamic Host Configuration Protocol. It is a protocol used for assigning dynamic IP
addresses to devices on a network.
DHCP used by networked computers (clients) to obtain IP addresses and other parameters such as the default
gateway, subnet mask, and IP addresses of DNS servers from a DHCP server.
The DHCP server ensures that all IP addresses are unique, for example, no IP address is assigned to a second client
while the first client's assignment is valid (its lease has not expired). Therefore, IP address pool management is done
by the server and not by a human network administrator.
359