The document discusses the transport layer and its role in process-to-process delivery using UDP and TCP. It describes TCP as a connection-oriented protocol that provides reliability, flow control, and error checking using three-way handshaking and checksums. UDP is described as a connectionless and unreliable protocol that uses port numbers for multiplexing but does not provide flow or error control like TCP.

1. Transport
Layer
Afsana Begum

2. Position of transport layer
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3. Process-to-Process
Delivery:
UDP and TCP
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4. Process-to-Process Delivery
Client-Server Paradigm
Multiplexing and Demultiplexing
Connectionless/Connection-Oriented
Reliable/Unreliable
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5. The transport layer is responsible for
process-to-process delivery.
Note:
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6. Types of data deliveries
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7. Port numbers
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Unit-4 : Transport Layer

8. IP addresses versus port numbers
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Unit-4 : Transport Layer

9. TCP
Byte Streaming
Full Duplex multiplexing
Segments
Connection Oriented (Reliability, 3 way
handshaking)
Flow and Error Control (Checksum)
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Unit-4 : Transport Layer

10. Size 20 bytes to 60 bytes
d.o.= Data Offset (header length)
Options and padding- to know mss

11. UDP
Port Numbers
User Datagram
Applications
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12. UDP is a connectionless, unreliable
protocol that has no flow and error
control. It uses port numbers to
multiplex data from the application
layer.
Note:
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13. User datagram format
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14. The calculation of checksum and its
inclusion in the user datagram are
optional.
Note:
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