Transport Layer: Understanding TCP, UDP, and Network Communication

Question 1

Which of the following accurately describes the key differences between TCP and UDP?

Accepted Answer

TCP offers connection-oriented service, while UDP is connectionless.

Accepted Answer

TCP is inherently more reliable than UDP.

Answer

UDP provides flow control, while TCP does not.

Question 2

What is NOT a core function of flow control in data communication?

Accepted Answer

Establishing connections between hosts

Answer

Preventing data loss

Answer

Optimizing network performance

Answer

Ensuring reliable data delivery

Question 3

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

Accepted Answer

To uniquely identify applications using the transport connection

Answer

To provide unique addresses for devices on a network

Answer

To control the rate of data flow

Answer

To detect and correct errors in data transmission

Question 4

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

Accepted Answer

To maintain the order of data segments in a data stream

Answer

To provide a checksum for the segment

Answer

To indicate the source and destination IP addresses

Answer

To control the flow of data

Question 5

Which of the following is a fundamental function of the Transport Layer in a network architecture?

Accepted Answer

Ensuring reliable and ordered data delivery

Answer

Discovering the optimal network path for data transmission

Answer

Converting application data into network packets

Answer

Handling the physical transmission of data over the network

Question 6

Which protocol is connection-oriented, provides reliable data delivery, and maintains data sequencing?

Accepted Answer

TCP

Answer

UDP

Answer

IP

Answer

HTTP

Question 7

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

Accepted Answer

Identifying the specific application or service running on a device

Answer

Determining the network address of the destination host

Answer

Ensuring the integrity of data during transmission

Answer

Controlling the flow of data between devices

Question 8

Which of the following is a flow control mechanism commonly used in the Transport Layer?

Accepted Answer

Sliding Window Protocol

Answer

Parity Check

Answer

Checksum

Answer

Forward Error Correction

Question 9

What is the role of an acknowledgment (ACK) in the TCP protocol?

Accepted Answer

To confirm successful receipt of data by the receiver

Answer

To initiate a connection between devices

Answer

To terminate a connection between devices

Answer

To request retransmission of missing data

Question 10

What is the key difference between connection-oriented and connectionless protocols?

Accepted Answer

Connection-oriented protocols establish a dedicated connection before data transfer, while connectionless protocols do not.

Answer

Connectionless protocols guarantee data delivery, while connection-oriented protocols do not.

Answer

Connection-oriented protocols use port numbers for identification, while connectionless protocols do not.

Answer

Connectionless protocols are inherently faster than connection-oriented protocols.

Question 11

Which of the following applications is a suitable use case for the UDP protocol?

Accepted Answer

Streaming live video

Answer

Secure file transfer

Answer

Database transactions

Answer

Online banking

Question 12

What is a primary advantage of using a sliding window protocol for flow control?

Accepted Answer

Efficient utilization of network bandwidth

Answer

Guaranteed delivery of data in the correct order

Answer

Prevention of data loss during network congestion

Answer

Reduced processing overhead on network devices

Question 13

Which of the following is NOT a responsibility of the Transport Layer in a network architecture?

Accepted Answer

Encryption and decryption of data

Answer

Error detection

Answer

Flow control

Answer

Fragmentation and reassembly of data

Question 14

Which key difference distinguishes TCP from UDP protocols?

Accepted Answer

TCP guarantees reliable data delivery, while UDP prioritizes speed over reliability.

Answer

UDP offers encryption, unlike TCP.

Answer

TCP operates without establishing a connection, while UDP requires a connection before data exchange.

Answer

TCP is typically faster than UDP.

Question 15

What is the primary purpose of implementing Transport Layer Security (TLS) in data communication?

Accepted Answer

Protecting data from unauthorized access and alteration

Answer

Enhancing data transfer rates

Answer

Identifying and correcting errors during data transmission

Answer

Guaranteeing reliable data delivery

Question 16

Within the TCP/IP model, which layer is primarily responsible for ensuring reliable and ordered data delivery?

Accepted Answer

Transport Layer

Answer

Network Layer

Answer

Data Link Layer

Answer

Application Layer

Question 17

In the Transport Layer, which protocol is commonly used for connectionless, unreliable data transmission?

Accepted Answer

UDP

Answer

TCP

Answer

SCTP

Answer

RTP

Question 18

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

Accepted Answer

Identifying specific services or applications on a host device

Answer

Regulating data flow between network devices

Answer

Ensuring data encryption and security

Answer

Providing addressing information for hosts on different networks

Question 19

Which flow control mechanism is commonly employed in TCP to prevent overwhelming the receiver's buffer?

Accepted Answer

Sliding window

Answer

Stop-and-wait

Answer

Go-back-N

Answer

Selective repeat

Question 20

What is the main purpose of the checksum field included in TCP and UDP headers?

Accepted Answer

Validating the integrity of transmitted data

Answer

Calculating the optimal transmission rate

Answer

Identifying the destination host

Answer

Providing flow control for data transfer

Question 21

Which of the following options is NOT a commonly used transport layer protocol?

Accepted Answer

ARP

Answer

HTTP

Answer

FTP

Answer

SMTP

Question 22

What is the primary distinction between TCP and UDP protocols?

Accepted Answer

TCP is connection-oriented, while UDP is connectionless.

Answer

UDP provides reliable data transfer, while TCP does not.

Answer

TCP utilizes port numbers, but UDP does not.

Answer

UDP is primarily used for real-time applications, while TCP is not.

Question 23

Which application type commonly utilizes UDP for data transmission?

Accepted Answer

Streaming multimedia content

Answer

Web browsing

Answer

Email transmission

Answer

File downloading

Question 24

What is the maximum size, in bytes, of a TCP segment?

Accepted Answer

65,535

Answer

512

Answer

1024

Answer

Varies based on network conditions

Question 25

Which transport layer protocol is connectionless and does not provide reliability or flow control?

Accepted Answer

UDP

Answer

TCP

Answer

HTTP

Answer

FTP

Question 26

What is the primary purpose of port numbers in networking?

Accepted Answer

To identify the source and destination of packets

Answer

To specify the type of service requested

Answer

To control the flow of data between devices

Answer

To ensure the reliable delivery of data

Question 27

Which transport layer mechanism is primarily responsible for correcting errors that occur during data transmission?

Accepted Answer

Error control

Answer

Flow control

Answer

Congestion control

Answer

Addressing

Question 28

What is the default maximum size of a TCP segment that can be transmitted without fragmentation?

Accepted Answer

1460 bytes

Answer

512 bytes

Answer

1024 bytes

Answer

2048 bytes

Question 29

Which transport layer protocol utilizes a mechanism known as congestion control to prevent network congestion?

Accepted Answer

TCP

Answer

UDP

Answer

HTTP

Answer

FTP

Question 30

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

Accepted Answer

To establish a reliable connection between two hosts

Answer

To exchange data between two hosts

Answer

To terminate a connection between two hosts

Answer

To control the flow of data between two hosts

Question 31

Which layer in the OSI model is primarily responsible for ensuring reliable end-to-end data transfer?

Accepted Answer

Transport layer

Answer

Physical layer

Answer

Data link layer

Answer

Network layer

Question 32

What is the function of the SYN flag in a TCP segment?

Accepted Answer

To initiate the establishment of a connection

Answer

To acknowledge the receipt of data

Answer

To terminate a connection

Answer

To request a retransmission of data

Question 33

Which port number is commonly used for unencrypted web browsing?

Accepted Answer

80

Answer

443

Answer

21

Answer

25

Question 34

What is the fundamental difference between TCP and UDP?

Accepted Answer

TCP is connection-oriented and reliable, while UDP is connectionless and unreliable

Answer

UDP is connection-oriented and reliable, while TCP is connectionless and unreliable

Answer

TCP and UDP are both connection-oriented and reliable

Answer

TCP and UDP are both connectionless and unreliable

Question 35

What is the fundamental difference between TCP and UDP?

Accepted Answer

TCP is reliable, while UDP is unreliable.

Answer

TCP is connection-less, while UDP is connection-oriented.

Question 36

Which of the following is a primary function of port numbers in the Transport Layer?

Accepted Answer

Identifying specific applications or services on a host

Answer

Determining the IP address of the destination host

Question 37

Which flow control mechanism does TCP employ to prevent overwhelming the receiver with data?

Accepted Answer

Sliding window

Answer

Stop-and-wait

Question 38

What is the purpose of the checksum in the TCP header?

Accepted Answer

To detect and correct errors during data transmission

Answer

To identify the sender and receiver of the data

Question 39

Which of the following is NOT an error control mechanism used in the Transport Layer?

Accepted Answer

Hashing

Answer

Forward error correction (FEC)

Question 40

What is the main advantage of UDP over TCP?

Accepted Answer

Less overhead

Answer

Greater reliability

Question 41

Which of the following applications benefits from using UDP?

Accepted Answer

Video streaming

Answer

File transfer

Question 42

What is the primary factor determining the maximum size of a TCP segment?

Accepted Answer

The MTU

Answer

1024 bytes

Question 43

Which of the following is a common application of TCP?

Accepted Answer

Transferring data between web servers and clients

Answer

Streaming audio

Question 44

What is the primary function of the Transport Layer in data communication?

Accepted Answer

Error and flow control

Answer

Establishing and terminating connections between devices

Answer

Breaking down data into manageable segments

Answer

Translating logical addresses into physical addresses

Question 45

Which Transport Layer protocol is connectionless and utilizes a best-effort delivery model?

Accepted Answer

UDP

Answer

TCP

Answer

HTTP

Answer

SMTP

Question 46

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

Accepted Answer

They uniquely identify specific applications or services running on a host

Answer

They direct the flow of packets to the correct destination

Answer

They manage the establishment and termination of connections

Answer

They enhance the reliability of data transmission

Question 47

Which flow control mechanism is employed to prevent receiver buffer overflow?

Accepted Answer

Sliding window

Answer

Stop-and-wait

Answer

Go-back-N

Answer

Selective repeat

Question 48

What is the primary error control mechanism utilized in TCP?

Accepted Answer

Automatic Repeat reQuest (ARQ)

Answer

Parity check

Answer

Checksum

Answer

Forward Error Correction (FEC)

Question 49

What is the fundamental distinction between a simple and a persistent HTTP connection?

Accepted Answer

Simple connections are closed after each request-response cycle, while persistent connections remain open for multiple requests.

Answer

Simple connections are faster, whereas persistent connections are more efficient.

Answer

Simple connections are designed for static content, while persistent connections are used for dynamic content.

Answer

There is no inherent difference between simple and persistent HTTP connections.

Question 50

Which of the following is a widely used protocol at the application layer?

Accepted Answer

HTTP

Answer

TCP

Answer

IP

Answer

Ethernet

Question 51

What is the primary purpose of a network socket?

Accepted Answer

Creating a virtual endpoint for communication, facilitating data transmission

Answer

Directing packets through the network

Answer

Translating domain names into their corresponding IP addresses

Answer

Providing security measures for data during transmission