TYPES OF NETWORKS & TOPOLOGIES

Question 1

What is a computer network?

Answer 1

Is 2 or more devices connected together via Physical connection (eg. Cable) or through wireless.

Question 2

Disadvantage of using a network…

Answer 2

Your personal data and information can be stolen

Question 3

You can easily import and share information to people which is a…

Answer 3

Advantage of Using a network.

Question 4

Negatives for using a network…

Answer 4

Data can be manipulated.
Can be sold to 3rd party people.
Costs money to set up and run.
Virus/hacking.
Files can be lost if not backed up.

Question 5

Advantages for using a network…

Answer 5

An efficient way of connection.
Can be accessed on different devices therefore compatible.
Can access internet.
Easy to backup.
Better protections like firewalls.

Question 6

What does LAN stand for?

Answer 6

Local Area Network

Question 7

This operates on a single site such as schools or small businesses. All devices are connected by cable or wireless (no 3rd party people) What network is this?

Answer 7

LAN (local)

Question 8

Covers a wide area (over 2km) and can be connected by leased lines like a phone company for eg. Is a satellite link, internet is an example of it. What network is this?

Answer 8

WAN (wide)

Question 9

What is wired connectivity?

Answer 9

Connection through Ethernet cables. A twisted pair.

Question 10

What is wireless connectivity?

Answer 10

Using WiFi

Question 11

What is a Bus Topology?

Answer 11

One of the oldest ones, all devices connected by a backbone, terminators at each end will prevent data from reflecting along the cable.

Question 12

What are some advantages for a Bus Topology?

Answer 12

Cheap + easiest to install.
New nodes (devices) can be easily added without disrupt of rest of network.

Question 13

Some disadvantages of the Bus Topology…

Answer 13

Is bus fails the whole network fails.
Poor security and privacy as all nodes see data before sent to node that it’s meant for.
Limit of number of connections.

Question 14

Is set up in a circular path and allows data to travel in a single direction. What topology is this?

Answer 14

RING TOPOLOGY

Question 15

Advantages of ring topology…

Answer 15

Data can be transferred quick, flows in one direction therefore no data collision.
Not affected by heavy traffic.
More nodes can be added without degrading of performance.

Question 16

Disadvantages of Ring topology…

Answer 16

If any cable fails, the whole network fails.
Privacy and security issues.
If there’s a problem in network it can be hard to identify.

Question 17

What is a star topology…?

Answer 17

Most common way to set up a LAN. In this network hosts are connected to a hub or switch.

Question 18

If one host goes down it doesn’t affect the others.
Network can be easily managed by central hub.
Faster data transfer, no collisions.
What topology is this the advantages of?

Answer 18

STAR TOPOLOGY

Question 19

Disadvantages of star topology…?

Answer 19

Central point determines performance and number is nodes the network can handle.
If central point fails, the whole network goes down.
More expensive as it has more connections.

Question 20

What is a Mesh topology?

Answer 20

When each node co operates in the relaying of data or info in the network. The routing technique or the flooding technique is the design of how a mesh topology works in a network .

Question 21

And advantages of Mesh topology is:

A broken ________ wont distract the transmission of data. What word is missing?

Answer 21

NODE

Question 22

Disadvantages of Mesh topology…?

Answer 22

Require continuous supervision as redundancies present in the network.
Requires a lot of devices therefore better for bigger companies to invest in.

Question 23

What is ‘The Hub’ (usually centre point of star topology)

Answer 23

Is the most basic computing network device which connects devices together and is cheaper than a router or switch. This broadcasts info to all nodes till it reaches the one it needs.

Question 24

What is ‘The Router’?

Answer 24

Allows you to connect a number of devices to the internet , and not all devices in your home have to be physically plugged in. The router is more intelligent than switch therefore it just send info to the specific node using IP address.