Transport Layer and Application Layer Quiz1

Which of the following is a primary function of the transport layer?

• Routing

• Flow Control

• Framing

• Encryption

What is multiplexing in the transport layer?

• Combining multiple signals into one

• Assigning IP addresses

• Dividing a message into small packets

• Encrypting messages

Demultiplexing in the transport layer refers to:

• Combining multiple messages into one

• Separating data streams based on port numbers

• Converting packets into frames

• Addressing errors in packets

Which of the following is not a characteristic of UDP?

• Connectionless communication

• Low overhead

• Guaranteed delivery

• No congestion control

TCP uses which mechanism to ensure reliable data delivery?

• Checksum

• Three-way handshake

• Encryption

• None of the above

Which layer is responsible for congestion control in TCP/IP?

• Application layer

• Network layer

• Transport layer

• Physical layer

What is a socket?

• A process that routes packets

• An endpoint of communication between two systems

• A device used for data storage

• None of the above

The primary purpose of DNS is to:

• Encrypt messages for secure transmission

• Convert domain names to IP addresses

• Provide error correction

• Ensure reliable data transmission

Which port does SMTP use for sending emails?

• 80

• 21

• 25

• 53

FTP operates on which port by default?

• 23

• 25

• 20 and 21

• 80