Concept of Layers GCSE

What is the primary purpose of dividing networking into layers?

• To focus only on security and encryption

• To make it more difficult for devices from different vendors to work together

• To simplify the networking process by dividing it into manageable sub-problems

• To increase the complexity of networking

Which method is mentioned as a way to transfer data between devices?

• Using a single type of cable for all data transfer

• Only using wireless methods

• Using peer-to-peer and client-server methods

• Transferring data without splitting into packets

What is the role of the transport layer in the TCP-IP protocol stack?

• To handle the physical connection between nodes

• To decide the final destination of the packet

• To add a source and destination IP address to each packet

• To establish an end-to-end connection and split data into packets

What does the network (internet) layer add to each packet?

• A source and destination MAC address

• A source and destination IP address

• The total number of packets and a port number

• An application protocol header

Why are packets numbered in the transport layer?

• To identify the type of application used

• To make encryption easier

• To ensure packets can be reassembled in the correct order

• To increase the speed of data transfer

What is the significance of the TCP-IP protocol stack?

• It allows any device to communicate and transfer data across the internet

• It is a single protocol that cannot be divided

• It is only used for local area networks

• It is outdated and no longer in use

What happens to a packet when it reaches a router according to the TCP-IP model?

• The router adds an application layer header

• The router converts the packet into a frame

• The router immediately sends the packet to its final destination

• The router strips off the outer layer and passes it up to the network layer

What layer is responsible for adding the MAC address to packets?

• Link (physical) layer

• Network layer

• Application layer

• Transport layer

Which of the following tasks is NOT mentioned as a responsibility of software in networking?

• Handling tasks without knowing about other software in higher or lower layers

• Encrypting all data packets

• Routing traffic using IP

• Sending web pages using HTTPS

What is the purpose of using different types of cables and wireless methods in networking?

• To accommodate different data transmission needs and environments

• To ensure data can only be sent in one direction

• To limit the speed of data transfer

• To complicate the networking setup process