Juniper CBL-M40-PWR-AU ユーザーズマニュアル
Glossary
M40 Internet Router Hardware Guide
232
SSH
Secure shell. Software that provides a secured method of logging in to a remote network
system.
system.
SSRAM
Synchronous Static Random Access Memory.
STM
Synchronous Transport Module. CCITT specification for SONET at 155.52 Mbps.
STS
Synchronous Transport Signal. Synchronous Transport Signal level 1. Basic building block
signal of SONET, operating at 51.84 Mbps. Faster SONET rates are defined as STS-n, where n
is a multiple of 51.84 Mbps. See also SONET.
signal of SONET, operating at 51.84 Mbps. Faster SONET rates are defined as STS-n, where n
is a multiple of 51.84 Mbps. See also SONET.
subnet mask
Number of bits of the network address used for host portion of a Class A, Class B, or Class C
IP address.
IP address.
Switch Interface Board
See SIB.
sysid
System identifier. Portion of the ISO nonclient peer. The sysid can be any 6 bytes that are
unique throughout a domain.
unique throughout a domain.
T
TCP
Transmission Control Protocol. Works in conjunction with Internet Protocol (IP) to send data
over the Internet. Divides a message into packets and tracks the packets from point of origin
to destination.
over the Internet. Divides a message into packets and tracks the packets from point of origin
to destination.
ToS
Type of service.
traffic engineering
Process of selecting the paths chosen by data traffic in order to balance the traffic load on the
various links, routers, and switches in the network. (Definition from
http://www.ietf.org/internet-drafts/draft-ietf-mpls-framework-04.txt.) See also MPLS.
various links, routers, and switches in the network. (Definition from
http://www.ietf.org/internet-drafts/draft-ietf-mpls-framework-04.txt.) See also MPLS.
tunnel
Private, secure path through an otherwise public network.
type of service
See ToS.
U
unicast
Operation of sending network traffic from one network node to another individual network
node.
node.
UPS
Uninterruptible power supply. Device that sits between a power supply and a router (or other
piece of equipment) the prevents undesired power-source events, such as outages and surges,
from affecting or damaging the device.
piece of equipment) the prevents undesired power-source events, such as outages and surges,
from affecting or damaging the device.
V
vapor corrosion
inhibitor
See VCI.
VCI
Vapor corrosion inhibitor. Small cylinder packed with the router that prevents corrosion of
the chassis and components during shipment.
the chassis and components during shipment.
VCI
Virtual circuit identifier. 16-bit field in the header of an ATM cell that indicates the particular
virtual circuit the cell takes through a virtual path. Also called a logical interface. See also VPI.
virtual circuit the cell takes through a virtual path. Also called a logical interface. See also VPI.
virtual circuit identifier
See VCI.