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List of terms
CIDR
See classless
CIR
See committed information rate (CIR) (page 30).
circuit emulation service (CES)
A service that converts and transports data from one circuit format to another. For example, a CES can convert DS1 circuit data to ATM cells at the ingress node for transport over an ATM network, and then reconvert the data to its original DS1 circuit format at the egress node.
Class A, B, and C (internetworking)
Address ranges for Internet addressing. These ranges are based on the first eight bits of the address. Each range allows less of the whole address for host addresses than the previous range.
•A Range from 1 to 126. This class is used for networks that have up to 224 nodes, such as government agencies and major university systems. Default address mask of 255.0.0.0.
•B Range from 128 to 191. This class is used for networks that have up to 216 nodes, such as large corporations. Default address mask of 255.255.0.0.
•C Range from 192 to 254. This class is used for smaller networks that have fewer than 255 nodes, such as smaller colleges and businesses. Default address mask of 255.255.255.0.
class of service (IP CoS)
A Nortel Multiservice Switch IP differentiated service feature that provides limited IP traffic management.
classless inter-domain routing (CIDR)
An internetworking protocol that uses subnetwork masks other than the defaults used for IP address classes. Defined in RFC1517 and RFC1518.
clock master
The bus tap in slot 0 or 15 that supplies clock signals for a backplane bus. This term can also be used for the processor card that contains this bus tap.
closed user group (CUG)
A collection of users whose members are governed by certain rules of access with respect to communication with each other, with members of other closed user groups, and with the open part of the network. These rules maintain security, prohibit unauthorized access. and provide logical partitioning of the network for better access control.
Nortel Multiservice Switch 7400/15000/20000
Terminology
PCR7.2 and up March 2006
Copyright © 2006, Nortel | Nortel Confidential |
