Fig. 1 shows a diagram of interconnected computer networks that use internet protocol (IP) to communicate. A file is being sent as six data packets from network A to network H. Nodes B to G are routers used to connect the networks. E F C B A G H D router network packet Key Fig. 1 Explain why the packets arriving at network H are in a different order from when they were sent by network A. Explain the role of the routers B to G in sending the packets from network A to network H.

9626_m18_qp_32

THEORY

2018

Paper 3, Variant 2

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There are a number of different types of protocols. PPP is a network protocol. Describe what is meant by PPP. Email is used to send and retrieve messages between email clients and email servers. One network protocol in common use for email access is Internet Message Access Protocol (IMAP). Describe the features of IMAP that make it suitable for email access on smartphones.

9626_m18_qp_32

THEORY

2018

Paper 3, Variant 2

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Gurjeet told his classmate Sunil “I’m going to search the internet to help me with my homework”. Sunil said “Surely you mean you are going to search the world wide web!” Explain, in detail, the differences between the internet and the world wide web.

9626_m20_qp_12

THEORY

2020

Paper 1, Variant 2

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Describe how peer-to-peer file sharing can be carried out using the BitTorrent protocol.

9626_m20_qp_32

THEORY

2020

Paper 3, Variant 2

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Explain the relationship between the World Wide Web and the internet.

9626_m21_qp_12

THEORY

2021

Paper 1, Variant 2

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Rajvinder and his team of car designers are producing designs for a new model. Their office is on the other side of town from the company’s head office. Every month, Rajvinder and the designers report to the company directors by means of a web conference. Describe how Rajvinder would set up this web conference, assuming that he is using a third party to supply the service and that he has checked that all the hardware and software is working.

9626_s17_qp_11

THEORY

2017

Paper 1, Variant 1

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Rajvinder and his team of car designers are producing designs for a new model. Their office is on the other side of town from the company’s head office. Every month, Rajvinder and the designers report to the company directors by means of a web conference. Describe how Rajvinder would set up this web conference, assuming that he is using a third party to supply the service and that he has checked that all the hardware and software is working.

9626_s17_qp_12

THEORY

2017

Paper 1, Variant 2

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A wide area network uses a number of different protocols. Describe each of the following wide area network (WAN) protocols. HDLC: Frame relay: An updated version of a free operating system has to be downloaded quickly. The operating system is contained in a very large file. There is a choice of using ‘BitTorrent’ or file transfer protocol (FTP) for the download. Explain, with reasons, which method of download would be preferable. Describe how a network router provides connectivity between a home network and the internet.

9626_s17_qp_31

THEORY

2017

Paper 3, Variant 1

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A wide area network uses a number of different protocols. Describe each of the following wide area network (WAN) protocols. HDLC: Frame relay: An updated version of a free operating system has to be downloaded quickly. The operating system is contained in a very large file. There is a choice of using ‘BitTorrent’ or file transfer protocol (FTP) for the download. Explain, with reasons, which method of download would be preferable. Describe how a network router provides connectivity between a home network and the internet.

9626_s17_qp_33

THEORY

2017

Paper 3, Variant 3

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Many computer users often confuse the terms the ‘internet’ and the ‘World Wide Web’. Explain what is meant by the term the ‘World Wide Web’.

9626_s18_qp_12

THEORY

2018

Paper 1, Variant 2

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