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Transport-Layer Services

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Questions and Answers

Where are transport-layer protocols implemented?

In the application layer

In network routers

In both end systems and network routers

In the end systems (correct)

What does the transport layer do on the sending side?

Extracts the transport-layer segment from the datagram

Converts application messages into transport-layer segments (correct)

Converts transport-layer segments into application messages

Passes the segment to the network-layer packet

What does the network layer do on the receiving side?

Converts application messages into transport-layer segments

Processes the received segment

Adds a transport-layer header to each chunk

Extracts the transport-layer segment from the datagram (correct)

What is the primary function of a transport-layer protocol?

Provides logical communication between application processes on different hosts Signup and view all the answers

Where is logical communication provided by the transport layer used?

To send messages between application processes on different hosts Signup and view all the answers

Explain the role of a transport-layer protocol in providing logical communication between application processes on different hosts.

The transport-layer protocol provides logical communication between application processes running on different hosts, allowing them to send messages to each other without worrying about the physical infrastructure details. Signup and view all the answers

What are transport-layer packets known as and how are they created?

Transport-layer packets are known as transport-layer segments and are created by breaking application messages into smaller chunks and adding a transport-layer header to each chunk. Signup and view all the answers

Where are transport-layer protocols implemented?

Transport-layer protocols are implemented in the end systems but not in network routers. Signup and view all the answers

Explain the relationship between transport-layer protocol and network-layer protocol.

A transport-layer protocol provides logical communication between processes running on different hosts, while a network-layer protocol provides logical communication between hosts. Signup and view all the answers

What is the role of the network layer on the receiving side?

On the receiving side, the network layer extracts the transport-layer segment from the datagram and passes the segment up to the transport-layer for further processing. Signup and view all the answers

Study Notes

Transport-layer protocols facilitate logical communication between application processes running on different hosts
Application processes use the transport layer for sending messages to each other, abstracted from physical infrastructure details
Transport-layer protocols are implemented in end systems, not network routers
Sending side: transport-layer breaks application messages into segments, adds header and passes to network layer
Receiving side: network layer extracts transport-layer segment, passes to transport-layer for processing and data availability to application
Transport-layer and network-layer: transport-layer handles process communication, network-layer handles host communication.

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Description

Test your knowledge of the logical communication and services provided by transport-layer protocols for application processes running on different hosts.