Entry-Level and Help Desk Positions Questions

Guys, Please Share Your Answers for the below Questions..

1. What is the difference between a hub and a switch?

2. What is a network?

3. What is Active Directory?

4. What is TCP/IP and what does it stand for?

5. What is a default gateway?

6. What does DHCP stand for?

7. What is an IP Address?

8. What is the significance of the IP address 255.255.255.255?

9. What are the 3 major classes of an IP network?

10. What is a Class D IP address?

11. What is OSPF?

12. A user is complaining of delays when using the network. What would you do?

Regards,

Anand