Chapter 3

Question 1

Electronic transmission of signals for communications

Answer 1

Telecommunications

Question 2

Any material substance that carries an electronic signal to support communications between a sending and receiving device

Answer 2

Telecommunications medium

Question 3

Set of rules, algorithms, messages, and other mechanisms that enable software and hardware in networked devices to communicate effectively

Answer 3

Networking protocol

Question 4

Rate at which data is exchanged

Answer 4

Channel bandwidth

Question 5

Classified by category: category 2, 3, 5, 5E, and 6

Answer 5

Twisted-pair wire

Question 6

Offers cleaner and crisper data transmission (less noise) than twisted-pair wire

Answer 6

Coaxial cable

Question 7

Transmits signals with light beams

Answer 7

Fiber-optic cable

Question 8

Short-range wireless connectivity technology designed for cell phones and credit cards

Answer 8

Near field communication (NFC)

Question 9

Wireless communications specification that describes how cell phones, computers, personal digital assistants, etc., can be interconnected

Answer 9

Bluetooth

Question 10

Short-range communications that employs extremely short electromagnetic pulses lasting just 50 to 1,000 picoseconds(ground probing radar, automotive radar, sensors)

Answer 10

Ultra wideband (UWB)

Question 11

Sends signals at a frequency of 300 GHz and above

Answer 11

Infrared transmission

Question 12

Form of wireless communications frequently used in security systems and heating and cooling control systems

Answer 12

Zigbee

Question 13

Uses multiple Wi-Fi access points to link a series of interconnected local area networks

Answer 13

Wireless mesh

Question 14

Consists of communications media, devices, and software needed to connect two or more computer systems or devices
Can transmit and receive information to improve organizational effectiveness and efficiency

Answer 14

Computer network

Question 15

All processing occurs in a single location or facility

Answer 15

Centralized processing

Question 16

Processing devices are placed at various remote locations (independent)

Answer 16

Decentralized processing

Question 17

Processing devices are placed at remote locations but are connected to each other via a network (a decision maker decides where to process)

Answer 17

Distributed processing

Question 18

Multiple computer platforms are dedicated to special functions

Answer 18

Client/server architecture

Question 19

Any computer that sends messages requesting services from the servers on the network

Answer 19

Client

Question 20

Sends only the data that satisfies a specific query, not the entire file

Answer 20

Database Server

Question 21

Combine data from multiple data sources into a single output signal that carries multiple channels

Answer 21

Multiplexers

Question 22

Telephone switching exchange that serves a single organization

Answer 22

Private branch exchange (PBX)

Question 23

uses the physical device address in each incoming message on the network

Answer 23

Switch(Hub)

Question 24

forwards data packets across two or more distinct networks toward their destinations

Answer 24

Router(Bridge)

Question 25

serves as an entrance to another network

Answer 25

Gateway

Question 26

Systems software that controls the computer systems and devices on a network

Answer 26

Network operating system (NOS)

Question 27

Locates telecommunications errors and potential network problems

Answer 27

Network management software

Question 28

Converting an original message into a form that can only be understood by the intended receiver

Answer 28

Encryption

Question 29

Variable value that is applied (using an algorithm) to a set of unencrypted text to produce encrypted text or to decrypt encrypted text

Answer 29

Encryption key

Question 30

Enables each computer in the network to access the Internet

Answer 30

DSL modem

Question 31

Filters the information coming from the Internet into your network

Answer 31

Firewall

Question 32

Encrypts all wireless communications to keep your network secure

Answer 32

Router

Question 33

Use of computing devices and networks so that employees can work effectively away from the office

Answer 33

Telecommuting

Question 34

Need to be strongly self-motivated, organized, focused on their tasks with minimal supervision

Answer 34

Telecommuters

Question 35

-Can link the computers of customers, manufacturers, and suppliers -Eliminates the need for paper documents and substantially cuts down on costly errors -uses a defined set of standards for transmitting business information that allows data to be interpreted correctly and instantly

Answer 35

Electronic Data Interchange (EDI)