networks

Question 1

what is a network

Answer 1

A ​network​ is the name given to ​two or more​ computers connected together with the ability to ​transmit data​ between each other.

​local area networks​ and ​wide area networks.

Question 2

LAN

Answer 2

a network which is spread over a ​small geographical area​ or a ​single site​, for example: a schoo

Question 3

WAN

Answer 3

a network which is spread over a ​large geographical area.​ Large corporations with offices in multiple locations will often have a WAN allowing them to communicate between different sites.

Question 4

physical bus toplogoy

Answer 4

In a bus topology, all the terminals ​(devices) are connected to a ​backbone cable​, the ends of which are plugged into a terminator​.

Question 5

Advantages of Bus Topology

Answer 5

• Relatively inexpensive to set up
• Doesn’t require any ​additional
  hardware

Question 6

Disadvantages of Bus Topology

Answer 6

• If ​backbone cable fails​, the entire network gets disconnected
• As traffic increases, ​performance decreases
• All computers can ​see the data transmission

Question 7

Physical Star Topology

Answer 7

Star topologies use a central node, often a switch​, to direct data through the network. MAC ​(Media Access Control) addresses, which are unique to a device, are used to identify each device on the network.

Question 8

Advantages of Star Topology

Answer 8

• Performance is ​consistent​ even with heavy network traffic
• If one cable fails,​ only that single terminal is affected
• Transmits data faster​, giving better performance than bus topology
• Easy to add new stations.
• No data ​collisions

Question 9

disadvantages of star topology

Answer 9

• Expensive​ due to switch and cabling
• if the central ​switch fails​, the rest of
  the ​network fails

Question 10

Physical Mesh Topology

Answer 10

In a mesh topology, every node is connected to every other node. Mesh topologies are most commonly found with wireless technology such as Wi-Fi.

Question 11

Advantages of Mesh Topology

Answer 11

• If using a wireless network, there is no cabling cost
• As the number of nodes increase, the ​reliability and speed​ of network becomes better
• Nodes don’t go through a central switch, improving ​speed

Question 12

Disadvantages of Mesh Topology

Answer 12

• If using a wireless network, devices with wireless capability (which increases ​cost​) must be purchased
• If using a wired network, a​ large quantity of cable​ is required compared to other network topologies
• Maintaining the network is ​difficult