Network

Question 1

Wired transmission media

Answer 1

Cable:
twisted pair
coaxial cable
fiber optic cable

Question 2

Wireless transmission media

Answer 2

microwave, satellite, infrared

Question 3

What is a twisted/wire pair

Answer 3

A type of wiring where two conductors of a single circuit are twisted together to improve electromagnetic compatibility.

Question 4

characteristics of a twisted pair

Answer 4

inexpensive, susceptible to electrical interference (noise), 2 conductors twisted around each other, plastic sheath

Question 5

What is a coaxial cable?

Answer 5

a type of copper cable specially built with a metal shield and other components to block signal interferences

Question 6

Characteristics of coaxial cable

Answer 6

higher bandwidth, less susceptible to noise

Question 7

What are fibre optics?

Answer 7

A network cable designed for long distance, high performance data networking. It contains strands of glass fibers inside an insulated casing

Question 8

characteristics of fibre optics

Answer 8

less expensive, higher bandwidth, transmits using light, immune to electrical noise, thinner than human hair, very light

Question 9

What is a network?

Answer 9

a group of computers connected to communicate and share devices

Question 10

Network types

Answer 10

Local Area Network
Wide Area Network
Metropolitan Area Network

Question 11

What is an intranet?

Answer 11

A private network within an organization using internet technologies to communicate and securely share information and resources

Question 12

What is an extranet?

Answer 12

A private network using internet technologies to share parts of an organization’s internal information with certain external parties

Question 13

What is the internet?

Answer 13

A global network of interconnected computers and computer networks

Question 14

What is LAN?

Answer 14

Local Area Network is a network of interconnected devices limited to a small area. For example, a school or the home.

Question 15

What is WAN?

Answer 15

Wide Area Network covers a larger area than LAN. It is not limited to a room, building or campus.

Question 16

What are the basic components of a network?

Answer 16

transmission media, router, network adapter

Question 17

What is Transmission Media?

Answer 17

Wires or signals which carry data communications from one place to another in a network

Question 18

What is infrared transmission media?

Answer 18

Used for device communications over short distances. These are cheap and cannot go through walls and requires line of sight. For example, a TV remote

Question 19

What is microwave?

Answer 19

A line of sight wireless communication that uses high frequency beams of radio waves to provide high speed wireless connections

Question 20

What is a satellite?

Answer 20

A self contained communications system that can receive signals from earth which are retransmitted back with a transponder

Question 21

Define Wi-Fi

Answer 21

Wireless Fidelity is a LAN allowing electronic devices to transfer data or connect to the internet

Question 22

What is a modem?

Answer 22

Modulator-demodulator is a device converting signals from analogue to digital and vice versa. It is usually provided by your internet service provider