Wk3 questions
- 1. SECN202 Networking Fundamentals WEEK 3: Application Layer Quick review question cover the material in the associated lecture notes and are to help the student identify the topics covered. They do not represent exam type questions; do not worry if you have difficulty with some of them. You can use them to raise awareness of the things you need to find out. Do not spend to long on any one question. Most of the solutions are a sentence to a paragraph long. Jot down your answer (plus any observations, e.g. Need to check this; why is that important?; What processes is this related to?...) beside the question. If you do not know the answer put a comment down to help your reflections later. You may choose to work through the questions with one or more colleagues, in which case they can form the basis for discussion of the ideas around the question. For example you may know what an acronym stands for, but what process is it associated with etc? The solutions of the Quick Review Questions will be supplied one week after the question sheet has been handed out. Copies of the questions and the solutions will be made available on Blackboard. Dr Mark Lynch GCU Based on CISCO Materials 1 QUICK REVIEW QUESTIONS
- 2. Q1 The application layer in the TCP/IP model is equivalent to which three layers of the OSI model? Q2 What is the function of The Application layer? Q3 Identify two functions of the Presentation layer. Q4 What is the primary purpose of the Session layer? Q5 How do you distinguish between Client and Server in the Client/Server Model? Q6 Which OSI layer does the client server process belong to? Q7 Distinguish between an Upload and a Down load. Q8 Briefly describe the service and operation of a Daemon. Q9 Briefly describe the operation of a Peer to Peer Network. Q10 Briefly describe the operation of a Peer to Peer Application (P2P). Q11 What do Port numbers do? Q12 What port number does HTTP use? Q13 Briefly state the purpose of DNS. Q14 What is the utility called ‘nslookup’ used for? Q15 What is ‘named’? Dr Mark Lynch GCU Based on CISCO Materials 2
- 3. Q16 Why does DNS use ‘caching’? Q17 What does HTTP, URL and URI stand for? Q18 Briefly interpret the three parts of URL: http://www.cisco.com/web-server.htm. Q19 Identify 3 common message types used by HTTP. Q20 Briefly describe the purpose of Telnet? Q21 What do the Telnet protocol commands AYT, IP, and EL do? Q22 Identify a safer protocol for server access than Telnet. Q23 What does DHCP stand for and what does it do? Q24 Identify a security risk associated with DCHP. Q25 What is the purpose of a DHCP NAK message? Q26 What does FTP stand for and what does it do? Q27 Which ports does FTP use and for what purposes? eMAIL Questions here Dr Mark Lynch GCU Based on CISCO Materials 3