Transport Layer Quiz: Test Your Knowledge of TCP and UDP

Question 1

What is the primary function of the Transport Layer in the TCP/IP model?

Accepted Answer

Ensuring reliable end-to-end data delivery between applications

Answer

Establishing physical connections between devices

Answer

Routing data packets between different networks

Question 2

Which Transport Layer protocol provides reliable, connection-oriented communication?

Accepted Answer

TCP

Answer

UDP

Answer

HTTP

Answer

IP

Question 3

When is UDP most suitable for use?

Accepted Answer

Streaming live video where some data loss is acceptable

Answer

Sending highly sensitive financial data

Answer

Downloading large files from a server

Question 4

What mechanism does TCP use to ensure data arrives in the correct order?

Accepted Answer

Sequence numbers

Answer

MAC addresses

Answer

Checksums

Answer

Port numbers

Question 5

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

Accepted Answer

Identifying specific applications or services on a device

Answer

Establishing physical connections between two devices

Answer

Routing data packets across different networks

Question 6

What is involved in the three-way handshake in a TCP connection?

Accepted Answer

Exchanging synchronization and acknowledgment messages between the client and server to initiate the connection

Answer

The client sending a single message to the server requesting data

Question 7

What is a potential drawback of using TCP compared to UDP?

Accepted Answer

Increased overhead and latency due to error checking and flow control

Answer

Inability to guarantee the delivery of data packets

Answer

Limited to smaller data packets compared to UDP

Question 8

Which Transport Layer protocol is suited for DNS requests?

Accepted Answer

UDP

Answer

IP

Answer

TCP

Answer

HTTP

Question 9

What is the role of a socket in network programming?

Accepted Answer

An endpoint of a communication channel between two processes

Answer

A specific type of data packet used by the Transport Layer

Answer

A physical port on a networking device

Question 10

Which Transport Layer protocol ensures reliable data delivery, employing flow control, error checking, and sequence numbering?

Accepted Answer

TCP (Transmission Control Protocol)

Answer

IP (Internet Protocol)

Answer

HTTP (Hypertext Transfer Protocol)

Answer

UDP (User Datagram Protocol)

Question 11

In a typical web server scenario, port 80 is commonly used for communication. Which Transport Layer protocol is predominantly employed in this context?

Accepted Answer

TCP

Answer

IP

Answer

UDP

Answer

HTTPS (HTTP Secure)

Question 12

The Transport Layer's primary function is:

Accepted Answer

Facilitating end-to-end communication between applications on different hosts.

Answer

Translating domain names to IP addresses.

Answer

Assigning logical addresses to devices.

Answer

Routing data packets across networks.

Question 13

Which of the following advantages is associated with UDP over TCP?

Accepted Answer

Lower latency and reduced overhead, making it suitable for real-time applications.

Answer

Enhanced data security.

Answer

More efficient bandwidth utilization.

Answer

Guaranteed data delivery and error correction.

Question 14

As part of its mechanism to guarantee reliable data delivery, TCP employs:

Accepted Answer

Segmentation and sequence numbers to reassemble data in the correct order at the receiving end.

Answer

Checksums to ensure data integrity.

Answer

Encryption techniques to secure data transmission.

Answer

Automatic retransmission of lost or corrupted packets.

Question 15

Which application is most likely to leverage UDP for communication due to its low latency and fast transmission?

Accepted Answer

Video streaming

Answer

Web browsing (HTTP)

Answer

Email (SMTP)

Answer

File transfer (FTP)

Question 16

The fundamental purpose of port numbers in the Transport Layer is to:

Accepted Answer

Identify specific applications or services running on a host.

Answer

Provide security and encryption for network communication.

Answer

Determine the physical address of a device.

Answer

Control the flow of data packets between devices.

Question 17

When a device initiates the closing of a TCP connection, what is the subsequent outcome?

Accepted Answer

The TCP connection is terminated, and both devices can no longer communicate.

Answer

A new TCP connection is automatically established to maintain communication.

Answer

The connection remains active, but data transmission is temporarily paused.

Answer

The other device continues to receive data from the closed connection.

Question 18

Among the following characteristics, which one does NOT apply to UDP?

Accepted Answer

Reliable data delivery with error checking

Answer

Lightweight and efficient for fast communication

Answer

Suitable for real-time applications

Answer

Uses datagrams for data transmission

Question 19

Within the Transport Layer, what is the term used to describe a unit of data encapsulated within a TCP packet?

Accepted Answer

Segment

Answer

Packet

Answer

Frame

Answer

Datagram

Question 20

Which transport layer protocol ensures reliable data delivery by providing error checking and retransmission?

Accepted Answer

TCP (Transmission Control Protocol)

Answer

HTTP (Hypertext Transfer Protocol)

Answer

UDP (User Datagram Protocol)

Answer

IP (Internet Protocol)

Question 21

Which of the following is NOT a feature of UDP (User Datagram Protocol)?

Accepted Answer

Guaranteed delivery of packets

Answer

Suitable for real-time applications like video streaming

Answer

Lightweight and fast packet processing

Answer

No connection establishment required

Question 22

When a web browser requests a webpage from a server, which transport layer protocol is typically used?

Accepted Answer

TCP

Answer

DNS

Answer

UDP

Answer

IP

Question 23

What is the primary purpose of a port number in the Transport Layer?

Accepted Answer

To identify specific applications or services running on a device

Answer

To route packets to the correct network

Answer

To ensure data integrity during transmission

Question 24

What is the main difference between TCP and UDP in terms of data transmission?

Accepted Answer

TCP provides reliable delivery, while UDP does not

Answer

UDP is more secure than TCP

Answer

TCP is faster than UDP

Answer

TCP uses less bandwidth than UDP

Question 25

Why is UDP often used for game servers?

Accepted Answer

UDP offers low latency and minimal overhead, essential for real-time gameplay

Answer

UDP guarantees packet delivery for reliable game updates

Answer

UDP provides enhanced security for sensitive game data

Question 26

What is the purpose of a TCP handshake?

Accepted Answer

To establish a reliable connection between two devices

Answer

To determine the optimal routing path for data packets

Answer

To encrypt data for secure transmission

Question 27

Which transport layer protocol is commonly used for email communication?

Accepted Answer

TCP

Answer

POP3 (Post Office Protocol 3)

Answer

UDP

Answer

SMTP (Simple Mail Transfer Protocol)

Question 28

When downloading a large file from a website, which transport layer protocol ensures the file is received without errors?

Accepted Answer

TCP

Answer

UDP

Answer

HTTP

Answer

FTP (File Transfer Protocol)

Question 29

What is the main difference between a TCP segment and a UDP datagram?

Accepted Answer

A TCP segment includes error checking and sequencing information, while a UDP datagram does not

Answer

A UDP datagram is more secure than a TCP segment

Answer

A TCP segment is always larger than a UDP datagram

Question 30

Which protocol is commonly used for applications that require guaranteed delivery and flow control?

Accepted Answer

TCP

Answer

UDP

Answer

ICMP

Answer

IP

Question 31

What is the primary purpose of the Transport Layer in the TCP/IP model?

Accepted Answer

To ensure reliable and efficient data transmission between applications.

Answer

To manage network addressing and routing.

Answer

To provide a physical connection between devices.

Question 32

Which of the following is a major difference between TCP and UDP?

Accepted Answer

TCP provides reliable, connection-oriented transport while UDP offers unreliable, connectionless transport.

Answer

TCP uses port numbers while UDP does not.

Question 33

What is the role of sequence numbers in TCP?

Accepted Answer

To ensure that data packets are delivered in the correct order and without duplication.

Answer

To identify the source and destination ports.

Answer

To calculate checksums for error checking.

Question 34

Which application layer protocol typically uses UDP for data transmission?

Accepted Answer

DNS

Answer

HTTP

Answer

SMTP

Answer

FTP

Question 35

What is the purpose of the TCP sliding window mechanism?

Accepted Answer

To control the flow of data between sender and receiver by adjusting the amount of data that can be sent without acknowledgment.

Answer

To guarantee that all packets are delivered in order.

Question 36

Which of the following is NOT a feature of TCP?

Accepted Answer

Connectionless communication

Answer

Sequencing

Answer

Flow control

Answer

Error detection and correction

Question 37

What is the difference between a TCP segment and an IP datagram?

Accepted Answer

A TCP segment is a unit of data transmitted by TCP, while an IP datagram is a unit of data transmitted by IP.

Answer

TCP segments are encapsulated within IP datagrams.

Question 38

Which of the following statements about UDP is true?

Accepted Answer

UDP provides a best-effort delivery service, meaning it does not guarantee that packets will be delivered or arrive in order.

Answer

UDP is typically used for applications that require high bandwidth.

Question 39

What is the significance of port numbers in the Transport Layer?

Accepted Answer

Port numbers identify the specific application or service that data is being sent to or from.

Answer

Port numbers are assigned by the network administrator.

Answer

Port numbers are used to determine the destination IP address of the data.