1
1 mark
A law company currently use a Local Area Network (LAN) linked to a Wide Area Network (WAN).
Define what is meant by a Wide Area Network.
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Networks & Topologies (OCR GCSE Computer Science): Exam Questions
Exam code: J277
2 hours39 questions
2a
2 marks
A university has buildings in two sites that are 5 miles apart.
Describe the difference between a LAN and a WAN.
2b
2 marks
Site A has 4 classrooms. Site B has 2 classrooms. The network on each site between the classrooms is a star topology using a switch. The two sites are connected over the Internet.
Complete the network diagram for site A of the University.
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3
1 mark
Devices on a network do not currently have Internet access.
Identify one device that can be used to connect a home network to the Internet.
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4
2 marks
Naomi’s office has five computers connected into a Local Area Network (LAN). There is also one printer that all the devices can print to.
The LAN is set up as a mesh topology
Draw connections to show one way that the devices could be connected using a mesh topology.
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5
3 marks
An office has a LAN (Local Area Network). The office has four employees who each have a laptop.
The office also has one server and one networked printer.
The office is set up as a star network with a switch at the centre.
All devices are connected to the network using cables.
Draw the devices and connections in the office star network.
All devices must be clearly labelled.
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6
1 mark
A user enters a uniform resource locator (URL) into a web browser on one of the computers in the house.
A system is then used to find the IP address of the web server associated with the URL.
Name the system which matches URLs to IP addresses on the web.
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7
1 mark
State the typical geographical range of a Local Area Network (LAN)
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8
2 marks
Identify two factors that can affect the performance of a network.
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9
1 mark
Define the term 'Bandwidth'
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10
1 mark
Identify the role of a 'client' in a client-server network
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11
1 mark
State one characteristic of a Peer-to-Peer (P2P) network
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12
1 mark
Define the term 'Cloud storage'
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13
1 mark
Identify which protocol is used by a web browser to request a page from a web server
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1a
3 marks
A library has a LAN (Local Area Network).
The LAN allows access by both wired and wireless devices. Users have reported that the network sometimes runs very slowly.
Explain why the number of devices using the network at the same time can affect the performance of the network.
1b
1 mark
Identify one other factor that can affect the performance of the network
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2a
4 marks
Explain two advantages to a law company of storing their data in the Cloud.
2b
4 marks
Explain two disadvantages to a law company of storing their data in the Cloud.
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3
3 marks
Hope has a network in her house. The main devices are shown in the diagram.
State whether Hope’s network is a LAN or a WAN.
Justify your choice.
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4
3 marks
Hope has a network in her house. The main devices are shown in the diagram.
Explain why Hope’s network uses a peer-to-peer model and not a client-server model.
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5
2 marks
Describe the role of the switch in an office network.
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6a
2 marks
The office introduces a WAP (Wireless Access Point) to allow network access to wireless devices.
The office manager has noticed that the performance of the network has recently decreased.
Describe how introducing wireless access could have slowed down the network.
6b
2 marks
Identify two other factors that can affect the performance of a network.
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7
3 marks
A house has computers in each room and a central router.
Every room allows both Ethernet and WiFi connections to the router.
Identify if the house network is a LAN (local area network) or a WAN (wide area network).
Justify your choice.
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8a
2 marks
Describe the purpose of the router in a home network.
8b
2 marks
Identify two additional items of network hardware, apart from cables and a router, that may be used within the house network.
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9a
3 marks
One office in the airport has five computers connected to one switch. There are two printers in the office that can be accessed by all computers.
The computers are connected using a star topology.
Draw a diagram to show how the five computers, switch and two printers are connected in a star topology
9b
2 marks
Give one benefit and one drawback of the office using a star topology instead of a mesh topology.
9c
3 marks
Describe the role of the switch in the star topology.
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10
2 marks
Describe two benefits of using a client-server model instead of P2P
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11
2 marks
Explain the purpose of a Domain Name Server (DNS)
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12
2 marks
Describe the request-response cycle between a web client and a web server
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1
3 marks
A network has several routers.
Identify three tasks carried out by a router.
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2
2 marks
Give two reasons why a bakery may use a star network topology for their LAN.
Reason 1 | |
|---|---|
Reason 2 |
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3
4 marks
Site B has a higher network performance than site A.
Explain how each of the following can contribute to the performance of a network.
Wifi frequency
Interference
Number of concurrent users
Type of network traffic
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4
6 marks
Hope’s files are stored on the cloud.
Describe the benefits and drawbacks to Hope of storing her files on the cloud.
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5
3 marks
Computer 1 enters the URL www.ocr.org.uk (opens in a new tab) into a web browser. This is then converted into the IP address of the webserver that hosts the website.
Explain how the URL www.ocr.org.uk (opens in a new tab) is converted into the IP address
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6
5 marks
The IP address 192.149.119.226 is linked to the website with a URL of https://www.ocr.org.uk (opens in a new tab)
When https://www.ocr.org.uk (opens in a new tab) is entered into a browser, the website homepage is loaded.
Describe the relationship between the website URL (https://www.ocr.org.uk (opens in a new tab)), the IP address and the webserver.
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7
3 marks
A university has multiple campuses across a city.
Explain why the connection between these campuses is a WAN, referring to ownership of the infrastructure.
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8
3 marks
A bank uses a WAN to connect its branches.
Discuss the security implications of using a WAN compared to a LAN.
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9
3 marks
Explain how an increase in the number of users can lead to a decrease in network performance
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10
2 marks
A small creative agency uses a P2P network.
Evaluate this choice as the agency expands to 50 employees and multiple rooms.
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11
4 marks
Compare the role of a switch and a router within an airport network.
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12
3 marks
"A DNS lookup for a website fails."
Explain how a user can still access the website if they know its IP address
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13
2 marks
A company uses Cloud services for its office software.
Analyse the impact if their Internet connection fails.
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14
3 marks
"A user types a website URL into their browser's address bar."
Explain how the browser determines the location of the web server to connect to it and display its web page to the user
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