Protecting a network

A model used to demonstrate how data is transmitted across the internet. The model has four layers: application, transport, internet, and link.

• OSI model

• TCP/IP model

• HTTP model

• Ethernet model

A protocol that is used to identify, request, and transfer web pages across the internet.

• FTP

• SMTP

• HTTP

• DNS

The ??? Layer deals with preparing data for sending. It also decodes data received so that it can be viewed by the end user. The application layer is used by applications, such as the web browser.

• Transport

• Internet

• Application

• Link

The ??? layer checks if the data needs to be broken down into segments. If so, it performs this operation. Once the data has been divided into segments, a header is added with information about the protocol used (either TCP or UDP) and the sender and receiver port numbers.

• Application

• Transport

• Internet

• Link

A suite of protocols used with wired networks. Any network hardware that uses this suite of protocols will work with any other hardware that uses them.

• WiFi

• Bluetooth

• Ethernet

• Zigbee

The ??? layer deals with the IP protocol. It uses this to create IP packets from the data passed into it from the transport layer. The IP packet has a header that lists the sender and receiver IP addresses.

• Link

• Session

• Transport

• Internet

• Application

The ??? layer deals with the physical transmission of the data. It creates frames from the IP packets passed to it from the internet layer. These frames include a header that lists the protocol used for the technology that is used from the current node to the next node on the network. It also lists the destination MAC address.

• Application

• Transport

• Internet

• Link

WiFi is a suite of protocols used with wireless networks. It enables the transmission of data through radio ???.

• Beams

• Signals

• Channels

• Waves

• Frequencies

Which of the following data is stored by the school about students and staff?

• Favorite hobbies

• Mobile phone numbers

• Favorite foods

• Social media profiles

What type of information about parents or carers is stored by the school?

• Parents' favorite movies

• Parents' work schedules

• Parents / Carers details

• Parents' vacation plans