Transport
Layer
Afsana Begum

Position of transport layer
1/29/2023

Process-to-Process
Delivery:
UDP and TCP
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Process-to-Process Delivery
Client-Server Paradigm
Multiplexing and Demultiplexing
Connectionless/Connection-Oriented
Reliable/Unreliable
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The transport layer is responsible for
process-to-process delivery.
Note:
1/29/2023

Types of data deliveries
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Port numbers
1/29/2023
Unit-4 : Transport Layer

IP addresses versus port numbers
1/29/2023
Unit-4 : Transport Layer

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

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

UDP
Port Numbers
User Datagram
Applications
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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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User datagram format
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The calculation of checksum and its
inclusion in the user datagram are
optional.
Note:
1/29/2023