AS and A Level OCR Computer Science

PM Heathcote, RSU Heathcote, PG Online

Chapter 5 Networks and web technologies - all with Video Answers

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Section 21

Structure of the Internet

Problem 1

A Uniform Resource Locator (URL) is the address of a resource on the Internet. For example, http://www.pgonline.co.uk/courses/alevel/computing_test.html.
Explain the different parts of the address.
(a) www.
(b) pgonline.co.uk
(c) /courses/alevel/computing_test.html

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Problem 2

A village hall committee is considering purchasing a lease on a web domain to set up a new website to advertise their events. They have been advised to contact an Internet registrar.
(a) Explain the role of an Internet registrar.
(b) What is the primary role of an Internet Service Provider (ISP)?

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Problem 3

Mahmood wants to create a small office network for a home enterprise.
(a) Describe what is meant by a LAN.
(b) Suggest two items of hardware that would be required to create a wireless LAN.

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