Transport Layer Protocols and Services

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What is demultiplexing in the context of the transport layer?

One source delivers items to multiple entities.
One entity delivers items to more than one source. (correct)
Multiple entities deliver items to one source.
Multiple sources deliver items to one entity.

What is the purpose of error control in the transport layer?

To make the transport layer reliable (correct)
To decrease network latency
To reduce network traffic
To increase network speed

What is a characteristic of the User Datagram Protocol (UDP)?

It is a connectionless, unreliable transport protocol. (correct)
It provides error control and correction.
It is a protocol used for file transfer.
It is a connection-oriented protocol.

What is the primary difference between a connectionless and a connection-oriented service?

The establishment of a connection before data transfer (B) Signup and view all the answers

What is a common task performed by the transport layer?

Flow control and error control (D) Signup and view all the answers

What is a feature of the Transmission Control Protocol (TCP)?

It is a connection-oriented, end-to-end reliable protocol. (D) Signup and view all the answers

What type of communication does TCP provide?

Connection-oriented (C) Signup and view all the answers

Which layer of the OSI model does TCP operate in?

Transport layer (B) Signup and view all the answers

What is the purpose of TCP sequence numbers?

To reconstruct the data stream (A) Signup and view all the answers

Why does TCP need sending and receiving buffers?

Because the sending and receiving rates may not match (A) Signup and view all the answers

What is the term used to describe the imaginary connection between two TCP processes?

Tube (B) Signup and view all the answers

What is the term used to describe the grouping of bytes into packets in TCP?

Segmentation (B) Signup and view all the answers

What is the primary function of the transport layer in data networks?

Establishing process-to-process communication (B) Signup and view all the answers

What is the purpose of well-known port numbers in TCP/IP?

To provide a universal address for servers (C) Signup and view all the answers

What is the result of multiplexing in the transport layer?

An entity accepts items from more than one source (C) Signup and view all the answers

What is the range of port numbers in TCP/IP?

Between 0 and 65,535 (C) Signup and view all the answers

What is the role of the transport layer in encapsulation and decapsulation?

To encapsulate and decapsulate messages (A) Signup and view all the answers

What is the combination of an IP address and a port number called?

Socket address (C) Signup and view all the answers

What is the minimum value of a port number in UDP?

0 (B) Signup and view all the answers

What is the purpose of the checksum field in a UDP packet?

To detect errors over the entire user datagram (C) Signup and view all the answers

What is the length of the header in a UDP packet?

8 bytes (A) Signup and view all the answers

How is the length of the data in a UDP packet calculated?

By subtracting the length of the header from the length of the packet (D) Signup and view all the answers

What is the maximum value of a port number in UDP?

65,535 (A) Signup and view all the answers

What is the purpose of the length field in a UDP packet?

To define the total length of the user datagram (D) Signup and view all the answers

What is the purpose of the acknowledgment mechanism in TCP?

To check the safe and sound arrival of data (B) Signup and view all the answers

What is the range of the length of the TCP header in bytes?

20 to 60 (D) Signup and view all the answers

What is the purpose of the sequence number in the TCP segment?

To define the number assigned to the first byte of data contained in the segment (D) Signup and view all the answers

What is the purpose of the window size field in the TCP segment?

To enable flow control (C) Signup and view all the answers

How many bits are used to define the header length in the TCP segment?

4 (B) Signup and view all the answers

What is the purpose of the control field in the TCP segment?

To enable flow control, connection establishment and termination, connection abortion, and the mode of data transfer (B) Signup and view all the answers