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Information system > Chapter 3 > Flashcards

Chapter 3 Flashcards

1
Q

Electronic transmission of signals for communications

A

Telecommunications

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2
Q

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

A

Telecommunications medium

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3
Q

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

A

Networking protocol

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4
Q

Rate at which data is exchanged

A

Channel bandwidth

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5
Q

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

A

Twisted-pair wire

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6
Q

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

A

Coaxial cable

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7
Q

Transmits signals with light beams

A

Fiber-optic cable

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8
Q

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

A

Near field communication (NFC)

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9
Q

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

A

Bluetooth

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10
Q

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

A

Ultra wideband (UWB)

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11
Q

Sends signals at a frequency of 300 GHz and above

A

Infrared transmission

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12
Q

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

A

Zigbee

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13
Q

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

A

Wireless mesh

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14
Q

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

A

Computer network

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15
Q

All processing occurs in a single location or facility

A

Centralized processing

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16
Q

Processing devices are placed at various remote locations (independent)

A

Decentralized processing

17
Q

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

A

Distributed processing

18
Q

Multiple computer platforms are dedicated to special functions

A

Client/server architecture

19
Q

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

A

Client

20
Q

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

A

Database Server

21
Q

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

A

Multiplexers

22
Q

Telephone switching exchange that serves a single organization

A

Private branch exchange (PBX)

23
Q

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

A

Switch(Hub)

24
Q

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

A

Router(Bridge)

25
Q

serves as an entrance to another network

A

Gateway

26
Q

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

A

Network operating system (NOS)

27
Q

Locates telecommunications errors and potential network problems

A

Network management software

28
Q

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

A

Encryption

29
Q

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

A

Encryption key

30
Q

Enables each computer in the network to access the Internet

A

DSL modem

31
Q

Filters the information coming from the Internet into your network

A

Firewall

32
Q

Encrypts all wireless communications to keep your network secure

A

Router

33
Q

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

A

Telecommuting

34
Q

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

A

Telecommuters

35
Q

-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

A

Electronic Data Interchange (EDI)

Information system (8 decks)

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