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Questions and Answers
What is the main role of the transport layer?
What is the main role of the transport layer?
- To provide communication services directly to application processes (correct)
- To manage physical connections between devices
- To encrypt data for secure transmission
- To route data packets within the network
What does the transport layer use to correctly deliver segments of data to the correct process?
What does the transport layer use to correctly deliver segments of data to the correct process?
- IP address
- MAC address
- Port number (correct)
- Protocol number
Where are the transport layer protocols implemented?
Where are the transport layer protocols implemented?
- Exclusively in the routers
- In the network layer
- In the application layer
- In the end systems (source and destination devices) (correct)
Which protocols are important at the transport layer?
Which protocols are important at the transport layer?
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What does the transport layer do with data from the application layer on the sender device?
What does the transport layer do with data from the application layer on the sender device?
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Study Notes
Main Role of the Transport Layer
- Ensures reliable communication between devices over a network.
- Manages end-to-end data transfer, providing service to the application layer.
Data Delivery Mechanism
- Utilizes port numbers to direct segments of data to the correct process or application.
- Each process on a device has a unique port number, ensuring accurate data delivery.
Implementation of Transport Layer Protocols
- Transport layer protocols are typically implemented in the operating system of devices.
- They interact closely with the network layer and the application layer.
Important Transport Layer Protocols
- Transmission Control Protocol (TCP): Provides reliable, connection-oriented transmission.
- User Datagram Protocol (UDP): Offers faster, connectionless communication without guaranteed delivery.
Handling of Application Layer Data
- Segments data from the application layer, adding necessary headers for proper addressing and error checking.
- Prepares data for transport by establishing connections and managing flow control and congestion.
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