Transport Layer Concepts: Process-to-Process Communication, Multiplexing, and Error Control

Question 1

Which primary function of the transport layer ensures reliable data transfer?

Accepted Answer

Detecting and correcting errors

Answer

Segmenting data

Answer

Controlling data flow

Answer

Directing data to its destination

Question 2

Which of the following is not a mechanism used for flow control?

Accepted Answer

IP filtering

Answer

Stop-and-wait

Answer

Sliding window

Answer

Congestion control

Question 3

What is the main function of a checksum in the transport layer?

Accepted Answer

To verify the accuracy of data packets

Answer

To identify the source and destination addresses

Answer

To control the flow of data

Answer

To encrypt data

Question 4

What is a primary benefit of using multiplexing in the transport layer?

Accepted Answer

Enhanced efficiency in data transmission

Answer

Improved reliability of data delivery

Answer

Increased security of data

Answer

Reduced latency in data transfer

Question 5

What is the primary purpose of the transport layer in data communications?

Accepted Answer

Transferring data reliably between applications

Answer

Establishing network connections

Answer

Identifying and correcting transmission errors

Answer

Encapsulating data into packets

Question 6

Which protocol in TCP is responsible for ensuring reliable data delivery?

Accepted Answer

ACK

Answer

SYN

Answer

UDP

Answer

IP

Question 7

Which port number is commonly used by HTTP?

Accepted Answer

80

Answer

21

Answer

443

Answer

25

Question 8

What is the primary function of the Sequence Number field in the TCP header?

Accepted Answer

Maintaining the order of segments within a message

Answer

Identifying the source and destination of the data

Answer

Indicating the length of the transmitted data

Answer

Ensuring that data is delivered to the correct application

Question 9

Which of the following applications typically utilizes UDP?

Accepted Answer

Video streaming

Answer

Web browsing

Answer

File transfer

Answer

Email

Question 10

Which of the following is NOT a primary function of the transport layer in data communications?

Accepted Answer

Data compression

Answer

Reliable delivery of data

Answer

Error detection and correction

Answer

Flow control

Question 11

What is the purpose of multiplexing in the transport layer?

Accepted Answer

To combine data streams from multiple applications into a single stream for transmission

Answer

To separate data streams from multiple applications at the receiving end

Answer

To provide error recovery for corrupted data

Answer

To establish and manage network connections

Question 12

What is the purpose of a congestion control algorithm in the transport layer?

Accepted Answer

To prevent network congestion and optimize data flow

Answer

To detect and correct errors in data transmission

Answer

To establish and manage network connections

Answer

To multiplex data streams from different applications

Question 13

Which of the following responsibilities is handled by the transport layer in data communications?

Accepted Answer

Facilitating process-to-process communication between network devices

Answer

Determining the best transmission path through the network

Answer

Managing network addressing and routing

Answer

Providing encryption and authentication services

Question 14

What key benefit does multiplexing provide in the context of transport layer communication?

Accepted Answer

It enables multiple applications on a single device to simultaneously utilize a shared network connection.

Answer

It dynamically adjusts data transmission rates based on network conditions.

Answer

It ensures error-free data transfer across the network.

Question 15

Identify the incorrect option regarding error control mechanisms employed at the transport layer:

Accepted Answer

Flow control

Answer

Checksums

Answer

Retransmission

Answer

Forward Error Correction (FEC)

Question 16

What is the primary purpose of port numbers within the transport layer?

Accepted Answer

To uniquely identify the specific application or service that data is intended for on a host device.

Answer

To determine the priority level for data transmission.

Answer

To assist in routing data to the appropriate destination device.

Question 17

What is the technical term for the process of segmenting data into smaller units within the transport layer?

Accepted Answer

Segmentation

Answer

Fragmentation

Answer

Encapsulation

Question 18

Provide an example of a practical application that heavily relies on the functionality provided by the transport layer:

Accepted Answer

World Wide Web browsing

Answer

Determining the most efficient route for data transmission

Answer

Electrical wiring within a building

Answer

Detecting and correcting errors in data transmission at the data link layer

Question 19

Which layer of the TCP/IP model is responsible for ensuring reliable, process-to-process communication between applications on different hosts?

Accepted Answer

Transport Layer

Answer

Data Link Layer

Answer

Physical Layer

Answer

Network Layer

Question 20

What is the primary purpose of port numbers in the Transport Layer?

Accepted Answer

Identify specific applications or services on a host

Answer

Establish physical connections between devices

Answer

Route data packets across the internet

Question 21

Which of the following is a connection-oriented protocol that establishes a virtual circuit before data transmission?

Accepted Answer

TCP

Answer

Ethernet

Answer

UDP

Answer

IP

Question 22

What is the purpose of the three-way handshake in TCP?

Accepted Answer

Establish a reliable connection between two hosts by exchanging SYN, SYN-ACK, and ACK messages

Answer

Fragment data into smaller packets

Answer

Resolve domain names to IP addresses

Answer

Handle flow control during data transmission

Question 23

Which Transport Layer feature ensures that data segments arrive at the destination in the correct order, even if they are transmitted out of sequence?

Accepted Answer

Sequencing

Answer

Flow Control

Answer

Error Control

Answer

Multiplexing

Question 24

Which of the following is an advantage of UDP over TCP?

Accepted Answer

Lower overhead and faster transmission due to the absence of connection establishment and flow control mechanisms

Answer

Connection-oriented communication with guaranteed data delivery

Answer

Built-in error checking and correction

Answer

Guaranteed delivery of data packets in the correct order

Question 25

What is the role of a checksum in the Transport Layer?

Accepted Answer

Detect errors in transmitted data segments by calculating and appending a value to each segment

Answer

Compress data to reduce transmission time

Answer

Fragment data into smaller packets for transmission

Answer

Encrypt data for secure transmission

Question 26

Which of the following applications typically uses UDP as the Transport Layer protocol due to its low overhead and tolerance for occasional data loss?

Accepted Answer

Video streaming

Answer

Web browsing

Answer

File transfer

Answer

Email communication

Question 27

What is the purpose of multiplexing at the Transport Layer?

Accepted Answer

Allow multiple applications on a host to simultaneously share the same network connection by using different port numbers

Answer

Translate domain names to IP addresses

Answer

Establish physical connections between devices

Question 28

How does the Transport Layer contribute to reliable data transmission?

Accepted Answer

By implementing mechanisms for error detection, flow control, and congestion control, ensuring data integrity and efficient delivery

Answer

By assigning IP addresses to devices on a network

Answer

By physically connecting devices through cables or wireless signals