ccna exploration network chapter 4
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© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 1
OSI Transport Layer
Network Fundamentals – Chapter 4
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Transport Layer Role and Services
Explain the purpose of the Transport layer: The Transport layer prepares data for transport over the network for use by Applications
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Transport Layer Role and Services Major functions of the transport layer and the role it
plays in data networks
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Transport Layer Role and Services Supporting Reliable Communication (UDP vs TCP)
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Transport Layer Role and Services Identify the basic characteristics of the UDP and TCP
protocols
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Transport Layer Role and Services Data for different applications is directed to the correct
application because each application has a unique port number.
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Transport Layer Role and Services
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Application and Operation of TCP Mechanisms How the TCP reliability mechanism works as part of a
session
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TCP Mechanisms of Operation
Three way handshake/Window Size
Sequence numbers/Acknowledgments
Termination of Session
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Managing TCP Sessions
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Managing TCP Sessions Describe how TCP sequence numbers are used to
reconstruct the data stream with segments placed in the correct order
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Managing TCP Sessions Trace the steps used by the TCP protocol in which
sequence numbers and acknowledgement numbers are used to manage exchanges in a conversation
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Application and Operation of TCP Mechanisms Trace the steps in the handshake in the establishment
of TCP sessions
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UDP Protocol Describe the characteristics of the UDP protocol and
the types of communication for which it is best suited
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UDP Protocol Describe in detail the process specified by the UDP
protocol to reassemble PDUs at the destination device
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UDP Protocol
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UDP Protocol Trace the steps as the UDP protocol and port numbers
are utilized in client-server communication.
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Summary
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