16. Which of the following are TCP/IP protocols used at the Application layer of the OSI model?
1. IP
2. TCP
3. Telnet
4. FTP
5. TFTP
A. 1 and 3
B. 1, 3 and 5
C. 3, 4 and 5
D. All of the above
17. What protocol is used to find the hardware address of a local device?
A. RARP
B. ARP
C. IP
D. ICMP
18. Which of the following protocols uses both TCP and UDP?
A. FTP
B. SMTP
C. Telnet
D. DNS
19. What is the address range of a Class B network address in binary?
A. 01xxxxxx
B. 0xxxxxxx
C. 10xxxxxx
D. 110xxxx