Networking Fundamentals (NTC 1) 6

1. Which of the following ports is used by HTTP?

A. 21

B. 80

C. 443

D. 25

Answer: b) 80

Rationale: HTTP (Hypertext Transfer Protocol) uses port 80 for transmitting

unencrypted web traffic.




2. What is the default subnet mask for a Class B IP address?

A. 255.255.0.0

B. 255.255.255.0

C. 255.0.0.0

D. 255.255.255.255

Answer: a) 255.255.0.0

Rationale: The default subnet mask for Class B IP addresses is 255.255.0.0.

,3. What is the primary purpose of a router in a network?

A. To connect devices in the same network

B. To forward data packets between different networks

C. To store data for backup purposes

D. To connect devices to the internet

Answer: b) To forward data packets between different networks

Rationale: A router is used to forward data packets between different networks by

determining the best path for data to travel.




4. Which protocol is used to transfer files between a client and a server on a

network?

A. HTTP

B. FTP

C. SMTP

D. SNMP

Answer: b) FTP

, Rationale: FTP (File Transfer Protocol) is used to transfer files between a client

and a server.




5. Which layer of the OSI model provides end-to-end communication services?

A. Application

B. Transport

C. Network

D. Data Link

Answer: b) Transport

Rationale: The Transport layer (Layer 4) provides end-to-end communication

services, including error recovery and flow control.




6. Which of the following is used to secure email communication?

A. SSL/TLS

B. HTTP

C. FTP

D. SNMP

Answer: a) SSL/TLS