1.3 Computer Networks and Protocols Quiz

Which factor does NOT affect the performance of networks?

• Bandwidth

• Transmission media

• Color of cables

• Number of users

Answer explanation

The color of cables does not impact network performance. Factors like bandwidth, transmission media, and the number of users directly influence how well a network operates, while cable color is purely aesthetic.

What is the primary focus of OCR GCSE (J277) 1.3?

• Systems architecture

• Data representation

• Computer networks, connections and protocols

• Cyber security

Answer explanation

The primary focus of OCR GCSE (J277) 1.3 is on computer networks, connections, and protocols, which covers how devices communicate and the rules governing these interactions, making it essential for understanding network functionality.

Which of the following is a type of network discussed in the OCR GCSE (J277) 1.3?

• Peer to peer

• All of the above

• Client server

• Star and mesh networks

Answer explanation

The correct answer is 'All of the above' because the OCR GCSE (J277) 1.3 discusses various types of networks, including peer to peer, client-server, and star and mesh networks.

Match the following protocols with their primary use for data transmission over the internet.

• Used for transferring hypertext documents on the web.

• SMTP

• Used for sending emails.

• FTP

• Used for secure data transmission over the internet.

• HTTPS

• Used for transferring files between computers.

• HTTP

Answer explanation

HTTPS (Hypertext Transfer Protocol Secure) is the protocol used for secure data transmission over the internet, encrypting data to protect it from eavesdropping, unlike HTTP, SMTP, and FTP which do not provide this level of security.

The main function of a router in a network is to (a)  

• To encrypt data
• To provide power to devices
• To store data
• To connect multiple networks and di

Answer explanation

The main function of a router is to connect multiple networks and direct data packets between them, ensuring efficient communication. This distinguishes it from other devices that encrypt, power, or store data.

_____ is NOT a network topology.

Answer explanation

The correct answer is 'Circle' because it is not a recognized network topology. The other options, Ring, Bus, and Tree, are established topologies used in networking.

What is the role of a switch in a network?

• To provide internet access

• To connect devices within a single network

• To encrypt data

• To manage network security

Answer explanation

A switch connects devices within a single network, allowing them to communicate and share resources efficiently. It does not provide internet access, encrypt data, or manage network security directly.

Which of the following is a common protocol used for email transmission?

• DNS

• FTP

• HTTP

• SMTP

Answer explanation

SMTP (Simple Mail Transfer Protocol) is the standard protocol used for sending emails across the Internet, making it the correct choice among the options provided.

Which device is used to amplify signals in a network?

• Router

• Switch

• Repeater

• Modem

Answer explanation

A repeater is specifically designed to amplify signals in a network, extending the transmission distance. Unlike routers, switches, and modems, which serve different functions, repeaters focus solely on signal strength.

Match the OSI model layers with their responsibilities.

• Responsible for user interface and communication services.

• Application Layer

• Responsible for establishing, managing, and terminating sessions.

• Session Layer

• Responsible for end-to-end communication and error recovery.

• Presentation Layer

• Responsible for data encryption and decryption.

• Transport Layer

Answer explanation

The Presentation Layer is responsible for data formatting and encryption. It ensures that data is presented in a readable format and can handle encryption and decryption, making it the correct choice for data encryption.