Chapter 6

Question 1

What is a computer network

Answer 1

is a collection of computers that communicate with each other over transmission lines or wirelessly

Question 2

types of computer network

Answer 2

WAN, LAN, The internet and Internets

Question 3

LAN ( Local Area Network)

Answer 3

connects computers that reside in a single geographic location on the premises of the company that operates the LAN

• Number of computer can range from 1 to several hundreds
• distinguishing characteristic: single location

Question 4

WAN (Wide area network)

Answer 4

• connects computers at different geographic location

Question 5

Intranet

Answer 5

a private internet that is used exclusively within an organization

Question 6

internet

Answer 6

a network of networks

-connects LANs, WANs, and other internets

Question 7

the Internet

Answer 7

• the most famous internet

- the collection of networks that you use when you send email or access a web site

Question 8

protocol

Answer 8

a set of rules that programs on tow communicating devices must follow

Question 9

layered protocol

Answer 9

used to provide seamless flow of information for the large variety of communication methods and conventions used on the internet

Question 10

SOHO

Answer 10

• small office or a home office
• such LAN’s have fewer than a dozen computers or printers
• can use wired and wireless connectivity

Question 11

switch

Answer 11

a special purpose computer that receives and transmits wired traffic on the LAN

Question 12

LAN device

Answer 12

a small computer than contains: a switch, a device for wireless communication, a device or connecting to a WAN and via that WAN to the internet

Question 13

LAN devices and SOHO

Answer 13

-they are typically provided by the phone or cable vendor

Question 14

NIC

Answer 14

• network interface card
• found on wired devices on a LAN
• a device that connects the computers or printers circuitry to the network wires
• Works with the programs in each device to implement the protocols necessary for communication

Question 15

On-board NIC

Answer 15

a NIC built into the computers circuitry

Question 16

What types of wires are wired LAN connections made with?

Answer 16

UTP - Un-shielded twisted pair

Optical Fiber cables

Question 17

UTP

Answer 17

contains set of wires that are twisted together to improve signal quality

Question 18

optical fiber cables

Answer 18

• if connections in a LAN carry a lot of traffic, this may be used
• light ray signals, and they are reflected inside the glass core of the optical fiber cable

Question 19

WNIC

Answer 19

a devices on a LAN connected wireless have a WNIC

- wireless NIC

Question 20

Access Point

Answer 20

component of the LAN device that processes wireless traffic and communicated with the wired switch

Question 21

Ethernet

Answer 21

• specifies hardware characteristics such as which wire carries which signal
• also describes how messages are to be packages and processed for wired transmission over the LAN

Question 22

10/100/1000 Ethernet

Answer 22

allows for transimission at a rate of 10, 100, 1000 Mbps (megabits per second)
- switches detect what speed a device can handle and communicate with it at that speed

Question 23

blue tooth

Answer 23

• another wireless protocol

- designed fro transmitting data over short distances, replacing cables

Question 24

ISP (internet service provider)

Answer 24

• provides ou with alegitimate internet address
• serves as your gateway to the internet
• pays for the internet