Glossary- T

Question 1

T-1

Answer 1

A common carrier standard protocol for transporting voice and data. T-1 can sup- port up to 24 separate voice channels of 64 kbit/sec each and is used primarily in North America.

Question 2

T-3

Answer 2

A common carrier standard protocol for transporting voice and data. T-3 can sup- port up to 672 separate voice channels of 64 kbit/sec each and is used primarily in North America.

Question 3

table

Answer 3

A unit of storage in a relational database management system (rDBMS) that can be thought of as a list of records. See also relational database management system.

Question 4

tablet

Answer 4

A mobile device with a touch screen interface. See also mobile device.

Question 5

tailgating

Answer 5

A technique used by intruders who attempt to enter a building; they may follow an employee into a building without showing their own security credentials (for example, a keycard).

Question 6

tape management system (TMS)

Answer 6

An information system that is used to manage tape media, usually for the purpose of performing information backup. See also backup.

Question 7

TCP/IP network model

Answer 7

The four-layer network model that incorporates encapsula- tion of messages. The TCP/IP suite of protocols is built on the TCP/IP network model.

Question 8

technical control

Answer 8

A control that is implemented in IT systems and applications.

Question 9

technical requirements

Answer 9

Formal statements that describe the required technical char-

acteristics that a system must support.

Question 10

technology standard

Answer 10

A standard that specifies the software and hardware technolo- gies that are used by the IT organization.

Question 11

TELNET

Answer 11

A TCP/IP application layer protocol that is used to establish a command- line session on a remote computer. TELNET does not encrypt user credentials as they are transmitted over the network, and has been largely replaced by SSH. See also secure shell (SSH).

Question 12

terminal emulation

Answer 12

A software program that runs on a workstation that emulates an older-style computer terminal.

Question 13

termination

Answer 13

The process of discontinuing employment of an employee or contractor.

Question 14

terrorist

Answer 14

A person or group who perpetrates violence for political or religious reasons.

Question 15

test plan

Answer 15

The list of tests that are to be carried out during a unit test or system test. See also unit testing, system testing.

Question 16

test server

Answer 16

Any type of server that is used to test features; a test server does not per- form production tasks.

Question 17

thick client

Answer 17

A workstation that contains a fully functional operating system and ap- plication programs.

Question 18

thin client

Answer 18

A workstation that contains a minimal operating system and little or no data storage.

Question 19

threat

Answer 19

An event that, if realized, would bring harm to an asset.

Question 20

time bomb

Answer 20

See logic bomb.

Question 21

time division multiple access (TDMA)

Answer 21

An airlink standard for wireless communica- tions between mobile devices and base stations.

Question 22

time of check/time of use (TOC/TOU)

Answer 22

See race condition.

Question 23

time synchronization

Answer 23

A network-based service that is used to synchronize the time

clocks on computers connected to a network.

Question 24

timebox management

Answer 24

A project management technique where a large project is bro- ken down into smaller components and time periods.

Question 25

token

Answer 25

A small electronic device that is used in two-factor authentication. A token may display a number that the user types in to a login field, or it may be plugged into a workstation to complete authentication. See also two-factor authentication.

Question 26

Token Ring

Answer 26

A standard protocol for assembling a stream of data into frames for trans- port over a physical medium from one station to another on a local area network. On a Token Ring network, a three-byte token is passed from station to station over the network. A station may not transmit a packet to another station until it has first re- ceived the token.

Question 27

tolerable error rate

Answer 27

The highest number of errors that can exist without a result being materially misstated.

Question 28

toll fraud

Answer 28

An attack on a private branch exchange (PBX) that results in stolen long- distance telephone service.

Question 29

Towers of Hanoi

Answer 29

A complex backup media rotation scheme that provides for more lengthy retention of some backup media. Based on the Towers of Hanoi puzzle. See also backup media rotation.

Question 30

training

Answer 30

The process of educating personnel; to impart information or provide an environment where they can practice a new skill.

Question 31

transaction processing (TP) monitor

Answer 31

A system that manages transactions between application servers and database servers in a distributed processing environment.

Question 32

transfer

Answer 32

The process of changing an employee’s job title, department, and/or responsibilities.

Question 33

Transmission Control Protocol (TCP)

Answer 33

The connection-oriented protocol used in the TCP/IP suite of protocols to establish a connection and transport messages from one station to another over a network during a communication session.

Question 34

transport

Answer 34

Layer 4 of the OSI network model. See also OSI network model. OR Layer 3 of the TCP/IP network model. The purpose of the transport layer is the controlled and ordered delivery of messages (called packets) from one application on a station to another on the same network or on different networks. See also TCP/IP network model.

Question 35

Transport Layer Security (TLS)

Answer 35

An encryption protocol used to encrypt webpages requested with the HTTPS (Hypertext Transfer Protocol/Secure) URL. Replacement for Secure Sockets Layer (SSL). See also Secure Sockets Layer (SSL), Hypertext Transfer Protocol Secure (HTTPS).

Question 36

Trojan horse

Answer 36

A type of malware where programs are purported to perform one func- tion, but which actually perform other (or additional) undesired functions.

Question 37

trunk

Answer 37

A telecommunications network technique where several communications can share a set of lines or frequencies.

Question 38

tunneling

Answer 38

The practice of encapsulating messages within another protocol.

Question 39

twinax

Answer 39

A type of coaxial cable that uses two inner conductors.

Question 40

twisted-pair cable

Answer 40

A type of network cabling that consists of a thick cable containing four pairs of insulated copper conductors, all surrounded by a protective jacket.

Question 41

two-factor authentication

Answer 41

Any means used to authenticate a user that is stronger than the use of a user ID and password. Examples of two-factor authentication include digital certificate, token, smart card, or biometric.