Networks (p 37-46)

Question 1

What is a network?

Answer 1

A group of two or more computing devices that are connected by a communication medium allowing them to communicate electronically

Question 2

List 2 advantages and 2 disadvantages of having a network

Answer 2

Advantages:
- Resources are shared over a network
- Better and more efficient communication

Disadvantages:
- You can be exposed to dangerous people
- Malware can spreads to other computers on a network

Question 3

What is the purpose of a NIC (Network Interface Card)?

Answer 3

Allows a device (node) to connect to a network

Question 4

What is the purpose of a Modem?

Answer 4

Connects a computer or network to the internet

Question 5

What is the purpose of a Switch?

Answer 5

Connects many computers on the same wired internal network

Question 6

What is the purpose of a Router/Bridge?

Answer 6

Connects different types of networks using one device (eg. combining wired and wireless networks or a LAN to a WAN)

Question 7

Compare the following wireless media:
- Wi-Fi (Wireless Fidelity)

• WiMAX (Worldwide Interoperability for Microwave Access)
• 4G/LTE (Long Term Evolution)
• 5G (5th Generation)

Answer 7

Wi-Fi:
A WLAN Connecting devices using radio signals over a short range.

WiMAX:
Long range wireless networking for mobile and fixed connections. It’s flexible and low in cost.

4G/LTE:
Wireless broadband technology designed to support roaming internet access by mobile devices.

5G:
5th generation of mobile networking technology.

Question 8

Describe the structure of a star topology

Answer 8

Devices are connected to a centra node (switch)

Question 9

List two advantages and a disadvanteges of a star topology

Answer 9

Advantages:
- New devices are easily added to the network
- if a connected device breaks it does not affect the rest of the network

Disadvantage:
- If the switch fails, the netire network becomes unstable