User Manual

Glossary
M40 Internet Router Hardware Guide
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BITS Building Integrated Timing Source. Dedicated timing source that synchronizes all equipment
in a particular building.
Border Gateway
Protocol
See BGP.
broadcast Operation of sending network traffic from one network node to all other network nodes.
bundle Collection of software that makes up a JUNOS software release.
C
CE device Customer edge device. Router or switch in the customer's network that is connected to a
service provider's provider edge (PE) router and participates in a Layer 3 VPN.
CFM Cubic feet per minute. Measure of air flow in volume per minute.
channel service unit See CSU/DSU.
CIDR Classless interdomain routing. A method of specifying Internet addresses in which you
explicitly specify the bits of the address to represent the network address instead of
determining this information from the first octet of the address.
class of service See CoS.
CLEC (Pronounced “see-lek”) Competitive Local Exchange Carrier. Company that competes with
the already established local telecommunications business by providing its own network and
switching.
CLEI Common language equipment identifier. Inventory code used to identify and track
telecommunications equipment.
CLI Command-line interface. Interface provided for configuring and monitoring the routing
protocol software.
community In BGP, a group of destinations that share a common property. Community information is
included as one of the path attributes in BGP update messages.
confederation In BGP, a group of systems that appears to external autonomous systems to be a single
autonomous system.
constrained path In traffic engineering, a path determined using RSVP signaling and constrained using CSPF.
The ERO carried in the packets contains the constrained path information.
core The central backbone of the network.
CoS Class of service. A group of privileges and features assigned to a particular service.
CPE Customer premises equipment. Telephone or other service provider equipment located at a
customer site.
craft interface Mechanisms used by a Communication Workers of America craftsperson to operate,
administer, and maintain equipment or provision data communications. On a Juniper
Networks router, the craft interface allows you to view status and troubleshooting information
and perform system control functions.