A+ Chapter 5 Objective 2 Review

ADSL

(Asymmetric Digital Subscriber Line) a type of digital subscriber line technology, a data communications technology that enables faster data transmission over copper telephone lines than a conventional voice band modem can provide.

CDMA

(Code Division Multiple Access) a method for transmitting multiple digital signals simultaneously over the same carrier frequency.

DSL

(Digital Subscriber Line) a technology that allows high-speed transmission of data, audio, and video, usu. over standard telephone lines.

GSM

(Global System for Mobile Communications) a standard set developed by the European Telecommunications Standards Institute to describe protocols for second-generation digital cellular networks used by mobile phones.

HSPA+

(High Speed Packet Access Plus) is an enhanced version of high-speed 3G wireless networks.

ISDN

(Integrated Services Digital Network) a set of communication standards for simultaneous digital transmission of voice, video, data, and other network services over the traditional circuits of the public switched telephone network.

LTE

(Long Term Evolution) a standard for wireless communication of high-speed data for mobile phones and data terminals.

PRI

(Primary Rate Interface) a standardized telecommunications service level within the Integrated Services Digital Network specification for carrying multiple DS0 voice and data transmissions between a network and a user.

VDSL

(Very High Speed DSL) a DSL standard that provides high speed Internet access. It is an improved version of asymmetric DSL that offers download speeds of up to 52 Mbps (6.5 megabytes per second) and upload speeds up to 16 Mbps (2 megabytes per second).

Wi Max

(Worldwide Interoperability for Microwave Access) a wireless communications standard designed for creating metropolitan area networks.

NSP

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Fiber-optic

A technology that uses glass (or plastic) threads (fibers) to transmit data. A fiber-optic cable consists of a bundle of glass threads, each of which is capable of transmitting messages modulated onto light waves.

Modem

An electronic device that makes possible the transmission of data to or from a computer via telephone or other communication lines.