Cisco CRS-1 - Carrier Routing System Router Getting Started Manual page 275

T
Cisco Technical Assistance Center.
TAC
Terminal Access Controller Access Control System. Authentication protocol, developed by the DDN
TACACS
community, that provides remote access authentication and related services, such as event logging.
User passwords are administered in a central database rather than in individual routers, providing an
easily scalable network security solution.
A "two-stage" configuration of the Cisco IOS-XR running configuration. This allows users to make
target configuration
changes to the running configuration and accept these changes by entering the commit command.
An identifier that determines user access to a given command or series of commands. A user must be
task ID
a member of a group with the appropriate task IDs assigned to it in order to execute the related
commands.
terabits per second. The amount of data that can be sent in a fixed amount of time. 1 terabit = 2
Tbps
1,099,511,627,776 bits.
Transmission Control Protocol. Connection-oriented transport layer protocol that provides reliable
TCP
full-duplex data transmission. TCP is part of the TCP/IP protocol stack.
Standard terminal emulation protocol in the TCP/IP protocol stack. Telnet is used for remote terminal
Telnet
connection, enabling users to log in to remote systems and use resources as if they were connected to
a local system. Telnet is defined in RFC 854.
A unit of computer memory or data storage capacity equal to 1024 gigabytes (2
terabyte
Approximately 1 trillion bytes.
Trivial File Transfer Protocol. A simplified version of FTP that allows files to be transferred from one
TFTP
computer to another over a network, usually without the use of client authentication (for example,
username and password).
Note: some TFTP servers (such as Sun Solaris) may not support file sizes larger that 32 MB.
table lookup.
TLU
Message sent by an SNMP agent to an NMS, a console, or a terminal to indicate the occurrence of a
trap
significant event, such as a specifically defined condition or a threshold that was reached.
Secure communication path between two peers, such as two routers.
tunnel
The transmitter end of a fabric link. All links are unidirectional. See also Rx.
Tx
Cisco CRS-1 Series Carrier Routing System Getting Started Guide
Glossary
40
bits,
40
bytes).
GL-17