Questions and Answers
Where are transport-layer protocols implemented?
In the end systems
What does the transport layer do on the sending side?
Converts application messages into transport-layer segments
What does the network layer do on the receiving side?
Extracts the transport-layer segment from the datagram
What is the primary function of a transport-layer protocol?
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Where is logical communication provided by the transport layer used?
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Explain the role of a transport-layer protocol in providing logical communication between application processes on different hosts.
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What are transport-layer packets known as and how are they created?
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Where are transport-layer protocols implemented?
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Explain the relationship between transport-layer protocol and network-layer protocol.
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What is the role of the network layer on the receiving side?
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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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