Network - 2 (2024)

• Computing
• Lower Secondary (Key Stage 3)

Networking

What do you think was shown on the previous slide?

1. A Network
2. A Circuit Diagram
3. A Computer Diagram
4. A Logic Gate Diagram

Key Objective: To understand the key components, which form a network.

 All 

• To be-able to describe a Network.
• To identify what the key components that make up a Network are.

Most 

• To be-able to describe what the key components of a Network do. 

Some 

• To be-able to explain where we might need a Network.
• To explain the suitability of a Network.

Where do you think we might use a 'Network'?

The definition of a 'Network'

A 'Network' is a group of two or more computer systems linked together so they can share information and resources.

Benefits of using a network over a standalone device?

Research Task - What is a NIC (Network Interface Card) ?

Network Interface Card (NIC)

• Allows device to connect to network
• gives an IP address
• uses a cable or wireless 

Research Task - What is a Network Hub/Switch?

HUB

• Connects devices together (its usually central in the network)
• sends any signal it gets to everything connected to it 

Switch

• Same as the hub but stores IP addresses of connected devices
• So it send thing to the correct device and not all of them 

Hub

Switch

This device information to all devices.

This device sends information to specific devices.

Research Task - What is a Network Router?

Router

• Connects two different networks together
• connects your home to internet
• redirects data packets

Research Task - What is a Wireless Access Point (WAP)?

Wireless Access Point (WAP)

• Creates a "hotspot"
• Allows wifi connection to a wired network 

Do you know any types of cable used in networking?

What is an Ethernet Cable?

• An Ethernet cable is a type of cable used to connect devices, such as computers or routers, to a network. It is a physical cable that allows data to be transmitted between devices.

• The cable contains several wires that carry the data signals, and it typically has a plastic connector on each end that can be plugged into a network port on a device or a network switch.

• There are two types CAT5 and CAT6. They both have different speed capabilities.

What does an Ethernet cable look like?

What is a Topology?

Is the layout of the network

There are two main types:

• MESH
• STAR

What is a Mesh Topology?

A mesh topology is a type of network architecture in which each device in the network is connected to every other device directly.

This is almost always a wireless network (can you think why!)

What does a Mesh Topology look like? 

What is a Star Topology?

A star topology is a type of network architecture in which all devices are connected to a central hub or switch. Each device on the network has a single point-to-point connection with the hub/switch, which acts as a central point of control for the network.

What does a Star topology look like?

Internet

Router

Ethernet Cables

Devices

What our Home 'Networks' look like

Do you think your home 'network' would be different from the school 'network'?

Yes

No

Maybe

I don't know

The 'School Network'

What do you think the difference is between your home network and school network?

What are the main differences?

Network Switches: A school network often has multiple network switches, which allow multiple devices to connect to the network and communicate with each other.

Server Hardware: A school network may have one or more servers, which are used to run network applications such as email, student information systems, and learning management systems.

Network Security Appliances: School networks typically have more advanced network security appliances than a home network, such as firewalls, intrusion detection and prevention systems, and content filters.

What is a Router?

1. A networking device that forwards data packets.
2. A device used to cut wood.
3. A musical instrument.
4. A kitchen appliance for making toast.

What is the difference between a switch and a hub?

1. A switch sends data to a specific device, while a hub sends data to all connected devices.
2. A switch and a hub are the same thing.
3. A switch is used for gaming, while a hub is used for streaming.
4. A switch is used for cooking, while a hub is used for storage.

What is a Network? Write a definition.