1
2 marks
Give the names of two protocols that may be used in a LAN.
Was this exam question helpful?
Networks (OCR A Level Computer Science): Exam Questions
Exam code: H446
2 hours23 questions
2
3 marks
A hotel uses a computer system to keep track of room bookings. The hotel staff are able to query a database to discover which rooms are booked or which rooms are free.
The hotel’s computer network uses a client-server model.
Describe what is meant by the term ‘client-server’ in this context.
Was this exam question helpful?
3
2 marks
Give two advantages of client-server compared to peer-to-peer.
Was this exam question helpful?
4
3 marks
Explain the purpose of a network switch
Was this exam question helpful?
5
2 marks
A company wants more customers to be able to find their website on the internet.
When customers contact the company, their computers will use a number of protocols such as TCP/IP and HTTP to make connections with other devices over the internet.
Explain what a protocol is and why they are important in network communications.
Was this exam question helpful?
6
2 marks
Define what is meant by a computer network.
Was this exam question helpful?
7
4 marks
Identify and describe a Local Area Network (LAN) and a Wide Area Network (WAN).
Was this exam question helpful?
8
2 marks
Identify one feature of a client-server network and one feature of a peer-to-peer (P2P) network.
Was this exam question helpful?
1
2 marks
Anika’s computer runs a multi-tasking operating system. She has access to a printer and a broadband internet connection through a wireless connection. The operating system uses scheduling algorithms such as first come first served and round-robin.
Anika uses an encrypted messaging program to communicate with her friends. The computer uses the TCP/IP stack.
Explain what happens at the link layer (sometimes referred to as the “network interface layer”, “network access layer” or simply the “network layer”) of the TCP/IP stack when using this program.
Was this exam question helpful?
2
5 marks
Anika’s computer runs a multi-tasking operating system. She has access to a printer and a broadband internet connection through a wireless connection. The operating system uses scheduling algorithms such as first come first served and round-robin.
Anika uses an encrypted messaging program to communicate with her friends. The computer uses the TCP/IP stack.
Explain what happens at the application layer of the TCP/IP stack when using this program
Was this exam question helpful?
3
3 marks
All computers owned by the business are connected together into a Local Area Network (LAN). Various network protocols are used in this network.
Give three advantages to the business of connecting computers together in a LAN
Was this exam question helpful?
4
2 marks
Explain what is meant by a network protocol.
Was this exam question helpful?
5
3 marks
Explain why protocol layering is used
Was this exam question helpful?
6
3 marks
A school has decided to implement a Wide Area Network (WAN) to connect multiple campus locations across the city. The network will use various communication protocols to enable connectivity between sites.
Give three benefits to the school of implementing a WAN to connect multiple campus locations
Was this exam question helpful?
1
9 marks
A hotel uses a computer system to keep track of room bookings. The hotel staff are able to query a database to discover which rooms are booked or which rooms are free.
The hotel is concerned about the security of its computer network.
Discuss the threats which potentially exist to the hotel’s computer network and how these threats could be eliminated or reduced.
Was this exam question helpful?
2
6 marks
Describe three different pieces of networking hardware in a client–server network apart from the clients and servers themselves.
Was this exam question helpful?
3
6 marks
A user sends an encrypted message via a web browser.
Evaluate how the Transport layer and the Internet layer interact to ensure data is delivered correctly.
Refer to encapsulation, port numbers, and routing.
Was this exam question helpful?
4
6 marks
A company uses its network for HD video conferencing and overnight off-site backups.
Evaluate the suitability of packet switching and circuit switching for these traffic types.
Was this exam question helpful?
5
4 marks
Modern network communication is based on protocol layering.
Evaluate the benefits of this modular approach and explain how it supports interoperability between different hardware manufacturers.
Was this exam question helpful?
6
6 marks
A corporation is concerned about DDoS attacks and SQL injection.
Evaluate the effectiveness of firewalls and employee training in mitigating these threats.
Was this exam question helpful?
7
4 marks
A school has a wired network in a computer lab and wants internet access for tablets in the library.
Justify the choice of wireless access points (WAPs) and switches for this implementation.
Was this exam question helpful?
8
6 marks
When a user types www.ocr.org.uk into a browser, DNS begins a resolution process.
Describe the steps and evaluate why caching is critical for performance.
Was this exam question helpful?
9
6 marks
A regional pharmacy chain is expanding from three local shops to twelve branches across a county. Each branch currently uses different hardware (routers and switches) from various manufacturers. The company needs to implement a network that allows every branch to access a central prescription database securely.
Evaluate the suitability of a client-server architecture compared to a peer-to-peer (P2P) architecture for this pharmacy chain.
In your answer, you should discuss how network standards and protocols will enable the company to maintain a cohesive network despite using hardware from different manufacturers.
Was this exam question helpful?