. One of your co-workers, Scott, asks you to explain the main operational difference between TCP and UDP. How does this difference affect which services use TCP or UDP?

2. Ann has configured Apache HTTP Server to host an equipment sign-out application. Students who use the university video cameras and accessories to complete assignments in their film class will complete the online form. She has configured the server to use the alternate port of 8080 as opposed to the well-known port of 80 for the HTTP service. Why would Ann choose to configure the application in this manner?

3. After working with FileZilla, Harrison notices that sometimes protocols use different ports in different situations. Passive FTP doesnt use port 20, in this case. Shortly thereafter, while setting up e-mail, Harrison is instructed to use TCP port 995 for POP3, port 993 for IMAP4, and port 587 for SMTP. Use the Web to find out why you would you use these port numbers, instead of the well-known port numbers of 110 for POP3, 143 for IMAP4, and 25 for SMTP?

4. While capturing packets with Wireshark, Meir pings one of the other computers on his network. He examines the output of the capture, and finds the section relating to the ping activity. What is the underlying protocol you would expect Meir to observe?