chapter one

Question 1

Data Communications

Answer 1

movement of computer information from one point to another by means of electrical or optical transmission systems

Question 2

Telecommunications

Answer 2

broader term and includes the transmission of voice and video (images and graphics) as well as data and usually implies longer distances

Question 3

Client

Answer 3

is a user device to access network and receive data from server

–e.g., desktops, laptops, tablets, cell phones, etc.

Question 4

Server

Answer 4

s a device that stores and transmits data to a client

–e.g., Web server, mail server, file server

Question 5

Circuit

Answer 5

is a pathway or connection between client and server

–e.g., copper wire, fiber optic cable, wireless

Question 6

Local Area Networks (LANs)

Answer 6

Covers a small, clearly defined area

Question 7

Backbone Networks (BNs)

Answer 7

High-speed networks connecting other networks together

Question 8

Wide Area Networks (WANs)

Answer 8

Largest geographic scope

Question 9

Intranet

Answer 9

A network (often a LAN) that uses the Internet technologies to share information within an organization

Question 10

Extranet

Answer 10

A network that uses the Internet technologies to share information between organizations

Question 11

Network Models

Answer 11

divide communication functions into layers

Question 12

Protocol

Answer 12

defines the language of transmission–It specifies the rules, functionality, and messages for communication at the layer

Question 13

Protocol Data Unit (PDU)

Answer 13

contains layer-specific information necessary for a message to be transmitted through a network

Question 14

Encapsulation

Answer 14

occurs when a higher level PDU is placed inside of a lower level PDU