Networks - Seneca

Question 1

What are the three benefits of networks?

Answer 1

1. Managing computers
2. Data exchange
3. Resource sharing

Question 2

How can (what do they do) a network manager manage other computers over a network?

Answer 2

• Updating software
• Fixing problems
• Help users e.g., resetting passwords

Question 3

What resources are commonly shared over a network?

Answer 3

• Printers
• Scanners
• Internet connections

Question 4

What are the four factors that affect network performance?

Answer 4

• Topology
• Wired vs wireless
• Choice of hardware
• Bandwidth

Question 5

Two wired network advantages:

Answer 5

• faster
• more reliable

Question 6

Define bandwidth

Answer 6

The amount of data that can be transferred in a given time.

Question 7

What happens to network speed if there are more users in a networks?

Answer 7

The performance can decrease because bandwidth is shared between all these users.

Question 8

What happens to network speed if there are more users in a network?

Answer 8

The performance can decrease because bandwidth is shared between all these users.

Question 9

What does LAN stand for?

Answer 9

Local area network

Question 10

What network covers a small geographical area?

Answer 10

LAN

Question 11

Where are LANs normally found?

Answer 11

-schools
-homes
-universities
-small companies

Question 12

Who sets up and maintains a LAN?

Answer 12

The organization that uses it.

Question 13

What does WAN stand for?

Answer 13

Wide area network

Question 14

What is the geographical classification for a WAN?

Answer 14

A collection of computers connected over a large geographical area.

Question 15

What is the most common modern networking model?

Answer 15

Client-server model

Question 16

What is a client-server?

Answer 16

Computers on the network each take the role of either the central server or a client.

Question 17

What does the client do in a client server model?

Answer 17

They request service from the server. The server will process the request and then send a response.

Question 18

How does the server provide service in a client server model?

Answer 18

• Storing files
• Printing
• Hosting a website

Question 19

Why is the client server model known as centralized?

Answer 19

Because the clients communicate with a central server.

Question 20

What are the pros of a client server model (5)?

Answer 20

• Clients machines can be monitored centrally
• Users accounts can be managed centrally
• Software and security updates can be managed centrally and applied to all computers this saves time
• Users files can be stored centrally so it is easy to access them from any networked computers
• Team members can easily share files

Question 21

What are the cons of client server model?

Answer 21

• If the central server fails then the whole network would not be able to function
• Server hardware is usually very expensive
• Servers are often targeted in cyber-attacks: ransomware attacks, denial of service attacks.

Question 22

What is a peer-to-peer model?

Answer 22

In a P2P network each computer is directly connected together. This removes the need for a central server.

Question 23

Describe a bit about P2P networks?

Answer 23

• Each ‘peer’ is responsible for connecting and maintaining themselves
• Each ‘peer’ can act as both a client and a server depending on what task they are trying to accomplish

Question 24

What are P2Ps commonly used for?

Answer 24

• File transfer
• Streaming videos from computer to mobile or TV
• Wireless printing
• Bluetooth speakers

Question 25

Pros of peer-to-peer model?

Answer 25

• They are robust: if one fails the others can still use the network
• Cheap- no expensive hardware
• Easy to setup