Computer Science

a level in a model that describes how data is transmitted across a network

a conceptual four layer model and set of protocols for internet communications

The TCP/IP model

Internet fundamentals

How data travels across the internet

Protocols

Network models

Hosting services

Web technologies

Threats to networks

Network security

In this unit pupils will explore how data travels across the internet. They will explore how protocols define communication between devices and the purpose of common network protocols. They will investigate the risks to networks and the methods that can be used to protect a network.

The internet and web technologies

How many layers are there in the TCP/IP model?

It provides services for user applications.

What is the main role of the application layer in the TCP/IP model?

Where does the Ethernet protocol operate in the TCP/IP model?

Which layer is responsible for routing data across different networks?

Put these TCP/IP layers in order from top (user) to bottom (hardware).

Match each protocol to the correct TCP/IP layer.

What is the term for a set of rules that devices follow to communicate with each other on a network?

Who or what usually assigns IP addresses on a local network?

What is the term for a small part of a file that is sent separately across a network to help transmit information efficiently?

Packets are transmitted across the network.

Packets are received by the destination device.

Packets are reassembled into the original file.

Place these steps in order to describe how data is sent over the internet.

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