Homework 2: Chapter 4

Homework 2: Chapter 4

Short-Test Questions:

1.  Modem

2.  Wide-area

3.  Fiber-optic

4.  Analog, digital

5.  Intranet

6.  File server

7.  Network OS

8.  Modulator-demodulator

9.  Bluetooth

10.  Antivirus

11.  Node

12.  Protocol

MCQ:

1.  C: twisted-pair wire

2.  E: all of the above

3.  D: disk server

4.  B: PDA

5.  B: Star network

6.  C: Peer-to-Peer

7.  E: Pulsating beams of light

T/F:

1.  T

2.  T

3.  T

4.  T

5.  T

6.  T

7.  F

8.  T

9.  F

Comprehension

1.  Intranet: internal private network that uses the infrastructure and standards of the internet and the web.
Extranet: private intranets that connect not only internal personnel but also selected suppliers and other strategic parties.

2.  LAN: Communications network that connects computers and devices in a limited geographic area
WAN: Communications network that covers a wide geographic area.

3.  The wider the bandwidth, the faster the data can be transmitted. The narrower the band, the greater the loss of transmission power. This loss of power must be overcome by using relays or repeaters that rebroadcast the original signal.

4.  System of hardware and/or software that protects a computer or a network from intruders.

5.  2G: Second Generation Cellular Radio. 3G: Third Generation Cellular Radio.

6.  Ring: Each node can communication with its neighbors.
Bus: Nodes communicate through a single wire
Star: Nodes communicate through a single hub

7.  All the fields of electrical energy and magnetic energy, which travel in waves.

8.  Set of conventions governing the exchange of data between hardware and/or software components in a communications network.

9.  Rule 1: Don't tell anyone your user name and password
Rule 2: Don't use passwords that can be easily guessed
Rule 3: Avoid any word that appears in a dictionary

10.  Using encryption to alter readable data into unreadable form can prevent unauthorized access.