Interlogix NS3502-8P-2S User Manual - Manual (Page 551)

IFS NS3502-8P-2S User Manual
551
C
CC
CC is an acronym for Continuity Check. It is a MEP functionality that is able to detect loss of
continuity in a network by transmitting CCM frames to a peer MEP.
CCM
CCM is an acronym for Continuity Check Message. It is an OAM frame transmitted from a MEP
to its peer MEP and used to implement CC functionality.
CDP
CDP is an acronym for Cisco Discovery Protocol.
D
DEI
DEI is an acronym 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).