Answer the following questions：
What harms can viruses do to the computers?
What is the difference between a hacker and a cracker?
What is network culture characterized with?
Can you give some acts that are considered as cyber crime?
Why is a firewall considered as an effective measure of network security?
Answer the following questions：
How can a person obtain an online degree?
What is the relationship between a blog and a website?
Why is Internet addiction recognized as a clinical disorder as well as a social problem?
Why is online shopping becoming so popular with the netizens?
What can a netizen do on the web?
In what ways do the search engines allow people to look for information?
Are blog communities bound by country borders?
Why has instant messaging become so popular with young people?
In what way does instant messaging differ from ordinary e-mail?
What can the netizens do in an online chat room?
By what means can people communicate with each other from a long distance?
What can the netizens do in an online forum?
How do you differ a web site from a web server?
What is the differences between synchronous conferencing and asynchronous conferencing?