OCR A level (H046-H446) SLR 11 – Networks

It includes:

• Student Learning Record (A3 version in word)
• Student Learning Record (PDF version)
• Student Learning Record (PowerPoint version)
• Student Learning Record (Exemplars)
• Set of student activities and workshops with answers
• Answers to the exam questions from the back of the SLR
• Teacher Marking Checklist
• Year 13 Recap Lesson

This topic covers:

H046

• 1.3.2 a-c Networks

H446

• 1.3.3 a-e Networks

Specific knowledge required for AS and A Level:

• Candidates need to understand the definition and purpose of a network.
• Candidates need to understand the purpose of, and importance of using, protocols.
• Candidates should be able to discuss examples of protocols that may be used in a network/ the internet (but will not be asked to recall information about any specific protocol).
• Candidates should understand the term standard, and the purpose and need for standards in a network (or any situation where data is transferred).
• Candidates need to understand the purpose and benefits of layering protocols, particularly within the TCP/IP stack. Candidates need to know the different layers within the TCP/IP stack and the purpose of each.
• Candidates need to understand how data is transmitted on the Internet, the use of IP addresses and packets in the transfer of data. (NB: Candidates are not expected to be familiar with the OSI model).
• Candidates are expected to understand the terms LAN and WAN.
• Candidates need to understand how the Domain Name System is used to find the IP address of a URL.
• Candidates need to understand the purpose, function, benefits and drawbacks of both packet and circuit switching.
• Candidates need to understand the difference between a client-server and peer-to-peer network.
• Candidates need to know the benefits and drawbacks of each type of network and be able to recommend one for a given scenario.

Specific knowledge required for A Level ONLY:

• Candidates need to understand that there are a range of security issues and threats involved with networked computers.
• Candidates need to be aware of threats such as hackers, viruses, unauthorised access, denial of service, spyware, SQL injection, phishing and pharming.
• Candidates need to know about ways of minimising, or preventing these threats for example firewalls, secure passwords, anti-virus, anti-spyware etc.
• Candidates need to have knowledge of the hardware required to connect to and/or build a network (e.g. modem, router, cable, NIC, Wireless Access Points, hub, switch etc).
• Candidates need to understand the purpose of the hardware, but are not required to understand how they physically work.