1. What is a network protocol and why are protocols needed when two machines communicate? 2 marks
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1 Topic1: Common Network Protocols 1. What is a network protocol and why are protocols needed when two machines communicate? 2. Describe the function of each of the following protocols: a. SMTP b. HTTP c. POP3 d. FTP 3. Describe the standard format of an address. 4. Describe how the TCP/IP protocols deal with the transfer of a file between two computers on a network. 5. Why does typing in: To the address box in a browser give you the same web page as: 6. What is the difference between HTTP and HTML? 7. What is the FTP protocol used for? What makes it different from HTTP? 8. What two protocols are used for sending and receiving 9. What is the name for the part of an address which comes after sign? Total 16 marks Page 1
2 Topic 2: The OSI Network Model 1. Describe the functions of: a. The Application Layer b. The Transport Layer 2. What does it mean when we say that the layers in the OSI Network Architecture model are Transparent? 3. What does it mean when we say that the layers in the OSI Network Architecture model are Hierarchical? 4. Which layer do HTTP and POP3 operate on? 5. When sending an from an client to a server, only the application layer of the OSI model is apparent to the user. How are the layers below involved in this process? 6. Which layer does TCP operate on? Total 1 Page 2
3 Topic 3: IP addresses and the Domain Name Service 1. A large company is intending to create a web site to give themselves a presence on the WWW. They have been told that they will need a Domain Name so that their web site can be found by search engines. Explain what a Domain Name is and why it is necessary. 2. What is the name for the service which converts names of computers into IP addresses? 3. What is the difference between a set of Class C IP addresses and a set of Class B IP addresses? 4. What is the difference between a public and a private IP address? 5. What is the difference between static and dynamic IP addressing? 2 mark s Total 9 marks Page 3
4 Topic 4: The World Wide Web (WWW) 1. What is the difference between a structure tag and a text tag when they are used in a web page written in HTML? 2. What is the difference between HTML and XHTML? 3. What is the benefit of using stylesheets when designing a web site? 4. What is a microbrowser and when might one be used? 5. Outline the differences between HTML and WML 6. Describe the two different types of search engine. 7. What kind of information do meta tags provide in a web page? Total 1 Page 4
5 Topic 5: The Implications of the WWW 1. List the advantages and disadvantages of e-commerce to: a) the consumer b) the retailer 2. List the advantages and disadvantages of tele-working to: a) the consumer b) the employer 3. What are cookies and how are they used when you view a web page? 4. What is misrepresentation? 5. One of the implications of the growth of the WWW is the increased division between the Information rich and the Information poor in our society What are the disadvantages which the Information poor are likely to suffer from? 6. What powers does the Regulation of Investigatory Powers Act (RIPA) give to the government? Total 2s Page 5
6 Topic 6: Network Security 1. What is the benefit of using a group access policy when implementing security on a network? 2. You are responsible for network security in a school what restrictions would you put on passwords that pupils use? 3. How is encryption strength classified? 4. What physical methods can be used to secure a network? 5. What is the difference between a virus, a worm and trojan? 6. How does a proxy server protect a network? 3 marks 7. What is the Walled Garden approach to filtering Internet access? What are the advantages and disadvantages compared to conventional Internet filtering? 3 marks Total 1 Page 6
7 Topic 7: Denial of Service Attacks and Disaster Recovery 1. What is a Denial of Service (DoS) Attack? 2. How does a resource starvation DoS attack work? 3. Why might a DoS attack occur? 4. What strategies would you recommend to a school network manager who is concerned about disaster avoidance. You should consider: a. Data loss b. Virus attack c. Hacker attack d. Equipment failure Total 8 marks Page 7
8 Topic 8: Data Transmission 1. Why are network connection speeds described in units of Kilobits per second (Kbps) instead of KiloBytes per second (KBps)? 2. What is meant by bandwidth and how does this affect the performance of a network? Explain the difference between asynchronous and synchronous data transmission 5. What is the difference between circuit and packet switching in a network, and what are the advantages of each? 6. Streaming video uses broadcast transmission rather than unicast transmission why is this more efficient? 7. What is the difference between the MAC address and the IP address of a network station? 8. Explain how CSMA/CD is used reduce the chance of simultaneous transmissions or collisions on an Ethernet network 9. What type of applications are unsuitable for Ethernet and other bus topologies? Give a reason for your answer. 10. What is the difference between error detection and error correction? 11. What two protocols are used with dialup internet connections? 12. What do the ADSL and cable data transmission systems have in common? 13. What do ISDN and leased lines have in common? 14. What services become possible when a high bandwidth connection is available? Total 30 marks Page 8
9 Topic 9: Wireless Data Applications 1. What current wireless technology is used to create a WPAN? 2. Why is security on a WLAN more difficult to implement than on a wired LAN? 3. What is the difference between a WPAN and a WLAN in terms of bandwidth and range? 4. What technologies can be used to secure a WLAN? 3 marks Total 7 marks Page 9
6. HTTP is the protocol for retrieving web pages, HTML is the language used to tell a browser how to display data on a web page.
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