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Naomi's office has five computers connected into a Local Area Network (LAN) - OCR - GCSE Computer Science - Question 6 - 2020 - Paper 1
Question 6
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. (a) The LAN is set up as a... show full transcript
Worked Solution & Example Answer:Naomi's office has five computers connected into a Local Area Network (LAN) - OCR - GCSE Computer Science - Question 6 - 2020 - Paper 1
Step 1
Draw connections to show one way that the devices could be connected using a mesh topology.
Answer
In a mesh topology, every device is connected to every other device. The connections could be drawn as follows:
- Computer 1 connected to Computer 2, Computer 3, Computer 4, Computer 5, and Printer.
- Computer 2 connected to Computer 1, Computer 3, Computer 4, Computer 5, and Printer.
- Computer 3 connected to Computer 1, Computer 2, Computer 4, Computer 5, and Printer.
- Computer 4 connected to Computer 1, Computer 2, Computer 3, Computer 5, and Printer.
- Computer 5 connected to Computer 1, Computer 2, Computer 3, Computer 4, and Printer.
Step 2
Tick one box in each row to identify if the statement about Ethernet is True or False.
Answer
| Statement | True | False |
|---|---|---|
| Ethernet is a protocol | ✅ | |
| Ethernet uses wireless data transmission | ✅ | |
| Ethernet can transmit data at speeds of up to 100 Gbits per second | ✅ | |
| Ethernet is a protocol within the TCP/IP stack | ✅ |
Step 3
Explain how the URL www.ocr.org.uk is converted into the IP address.
Answer
When Computer 1 enters the URL www.ocr.org.uk into a web browser, several processes take place to convert it into an IP address:
-
DNS Query: The browser sends a request to a Domain Name System (DNS) server to resolve the domain name www.ocr.org.uk into its corresponding IP address.
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Domain Lookup: The DNS server searches its database for the IP address associated with the provided domain name. If it has the IP address stored, it returns that information.
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Return IP Address: If the DNS server does not have the record, it may query other DNS servers until it finds the correct IP address or returns an error if unavailable.
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Use of IP Address: Once the IP address is obtained, the browser can use it to establish a connection with the webserver hosting the website.
Step 4
State three items of data that would be contained in a packet header.
Answer
- Source IP Address: The IP address of the sender (Computer 1).
- Destination IP Address: The IP address of the receiver (webserver).
- Protocol Information: The protocol being used (e.g., TCP or UDP), specifying how the packet should be processed.