SLR 11 Networks

Question 1

What is a local area network (LAN)?

Answer 1

A local area network is a method of connecting computers together in a small geographical area.

Question 2

What is a wide area network (WAN)?

Answer 2

A wide area network is a method of connecting computers in a large geographical area.

Question 3

What are the benefits of using a network?

Answer 3

• Allows the sharing of resources such as storage and printers
• Allows the sharing of data
• Allows for easy communication

Question 4

What are the negatives of using a network?

Answer 4

• If the network fails, it may be impossible to access various resources
• Efficiency of a network depends on the network manager
• Vulnerable to hackers

Question 5

What is a protocol?

Answer 5

A set of rules relating to the communication between devices

Question 6

What is the TCP?

Answer 6

Transmission Control Protocol, used with IP to ensure error free transmission and package switching.
TCP / IP is the most common protocol.

Question 7

What is the IP?

Answer 7

Internet protocol, used to transfer all packets across the internet between routers

Question 8

What is the FTP?

Answer 8

File transfer protocol, Used by clients and servers to upload and download files across the internet.

Question 9

What is the HTTP?

Answer 9

Hypertext Transfer protocol, used by web servers and browsers to transfer web pages.

Question 10

What is the SMTP?

Answer 10

Simple mail transfer protocol, used by mail servers and clients to transfer email across the internet

Question 11

What is circuit switching?

Answer 11

A complete circuit / route is established before data transmission begins. This route is used until transmission is complete.

Question 12

What are the phases of circuit switching?

Answer 12

1. Establish connection
2. Transfer data
3. Release connection

Question 13

What is packet switching?

Answer 13

• Before transmission, the data being sent is broken up into individual packets at the source computer.
• Each packet has information such as the destination, where it is coming from and a sequence number ie packet 9 out of 15. - Each packet may take different routes based on network traffic.
• The receiving device re-assembles the packets using the sequence number and requesting any missing packets into a complete file.

Question 14

What is the client-server model?

Answer 14

One device, the client, requests data from another device, the server.

Question 15

What are the benefits of the client-server model?

Answer 15

It neatly separates functions allowing efficient allocation and use of resources.

Question 16

What are the negatives of the client-server model?

Answer 16

The server becomes a point of failure. if the server goes down, the entire network becomes inoperable.

Question 17

What is the peer-to-peer model?

Answer 17

All computers have equal status.

Each computer acts as both a computer and a server.

Question 18

What are the benefits of the peer-to-peer model?

Answer 18

Cheap to set up.

If one computer goes down, the rest can still operate perfectly.