Brief and concise

1. what is packet switching?
2. what is VPN?
3. name the 3 types of address used on the internet
4. describe the elements of an email address
5. networks would be inoperable without protocols. explain their importance and what functions they perform
6. what is the purpose of the TCP portion of TCP/IP?
7. what does the HTTP do?
8. how do HTTP and HTTP-NG differ?
9. what is the WWW or world wide web?
10. define IP spoofing