1. Computer A is going to send a packet to Computer B. The network is running TCP/IP. Their IP addresses are and respectively. What does Computer A need to do in order to send the packet to Computer B?

2. What is the primary function of a DNS server?

3. TCP/IP falls into which layers of OSI? (Choose two)

4. Before, you have one IDE hard disk installed on the primary IDE channel of your computer. One day, after you had added a second hard disk to the same IDE channel and then you computer failed to detect the hard disks. What is the most likely reason?

5. Which of the following is a example of IP address?