16.
Which of the following are TCP/IP protocols used at the Application layer of the OSI model?
IP
TCP
Telnet
FTP
TFTP
A. 1 and 3
B. 1, 3 and 5
C. 3, 4 and 5
D. All of the above
Answer & Explanation
Answer: Option C
Explanation:
Telnet, File Transfer Protocol (FTP), and Trivial FTP (TFTP) are all Application layer protocols. IP is a Network layer protocol. Transmission Control Protocol (TCP) is a Transport layer protocol.
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17.
What protocol is used to find the hardware address of a local device?
A. RARP B. ARP
C. IP D. ICMP
Answer & Explanation
Answer: Option B
Explanation:
Address Resolution Protocol (ARP) is used to find the hardware address from a known IP address.
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18.
Which of the following protocols uses both TCP and UDP?
A. FTP B. SMTP
C. Telnet D. DNS
Answer & Explanation
Answer: Option D
Explanation:
DNS uses TCP for zone exchanges between servers and UDP when a client is trying to resolve a hostname to an IP address.
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19.
What is the address range of a Class B network address in binary?
A. 01xxxxxx
B. 0xxxxxxx
C. 10xxxxxx
D. 110xxxxx
Answer & Explanation
Answer: Option C
Explanation:
The range of a Class B network address is 128-191. This makes our binary range 10xxxxxx.