Unit 1 : L4 - Network connections

Question 1

What is a wired connection?

Answer 1

A wired network uses copper cables or fibre optic cables to connect the components of a computer.

Question 2

What is a wireless connection?

Answer 2

A wireless network uses radio signals to connect computers within its range.

Question 3

What is a wireless router?

Answer 3

A wireless router connects the computer with the physical network.

Question 4

What is a copper cable?

Answer 4

Digital data is sent in the form of electric signal through copper cables.

Question 5

What are the 3 types of copper cables?

Answer 5

Coaxial
Unshiel twisted pair
Shield twisted pair

Question 6

Coaxial :

Answer 6

Coaxial cables are to be replaced from time as the insulation may degrade.

Question 7

Unshield twisted pair :

Answer 7

The data transmission is fast and crosstalk is reduced.

Question 8

Shielded twisted pair :

Answer 8

Metal shielding is provided to twisted pair cables to reduce electromagnetic inter ference.

Question 9

Advantages of copper cables :

Answer 9

. Telephones can be powered directly from this cable.
. Inexpensive to install.

Question 10

Disadvantages of copper cables :

Answer 10

Short lifetime

Question 11

What are fire optic cables?

Answer 11

These are made of glass and the digital data is transmitted in the form of light signal.

Question 12

Advantages of fibre optic cable :

Answer 12

. Long lifetime
. Less electromagnetic interference when compared to copper cables.

Question 13

Disadvantages of fibre optic cable :

Answer 13

. Expensive to install

Question 14

What is the Ethernet?

Answer 14

This is one of the technologies to implement LAN’s since the 1980’s an it provides transmission rate of up 100 Gb/s.

Question 15

What is the Ethernet network?

Answer 15

A Ethernet network is divided into various segments. Each segment has a UTP cable that is shared among a few device.

Question 16

What is a wireless adapter?

Answer 16

It translates digital data into radio signals.

Question 17

What is a wireless reciever?

Answer 17

It translates radio signals into binary so that the computer can understand it.

Question 18

What is the Ethernet?

Answer 18

This is one of the technologies to implement LAN’s since the 1980’s an it provides transmission rate of up 100 Gb/s.

Question 19

Advantages of wireless connection :

Answer 19

. Cheap and easy to install
. Multiple devices can be connected without any additional hardware.

Question 20

Disadvantages of wireless connection :

Answer 20

. Slower compared to a wired network
. Security issues

Question 21

What is WIFI?

Answer 21

It is a technology that enables wireless connecting to all sorts of devices E.g: laptops, smartphones

Question 22

What does WIFI stand for?

Answer 22

Wireless Fidelity

Question 23

How are radio signals identified?

Answer 23

These are identified using its frequency.

Question 24

How much frequency does WIFI use?

Answer 24

2.4GHz - 5GHz

Question 25

What is a channel?

Answer 25

It is a communication link to send a recieve data.

Question 26

What are the 2 types of networks?

Answer 26

.Private networks are used in homes
.Public networks are available in malls, airports or restaurants

Question 27

What do data packets contain?

Answer 27

They contain info of the sender and receiver such as device address.

Question 28

What does NIC stand for?

Answer 28

Network interference card

Question 29

What is NIC?

Answer 29

It is a small circuit board that is a part of the motherboard

Question 30

What are the 3 types of mobile wifi networks?

Answer 30

GPRS - General packet radio service
3G - 3rd generation
4G - 4th generation

Question 31

What is NIC used for?

Answer 31

needed to connect to the internet.