chapter_4
DESCRIPTION
CCNA Network FundamentalsTRANSCRIPT
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© 2007 Cisco Systems, Inc. All rights reserved. Cisco PublicITE PC v4.0Chapter 1 1
OSI Transport Layer
Network Fundamentals – Chapter 4
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ITE PC v4.0Chapter 1 2© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Objectives Explain the role of Transport Layer protocols and
services in supporting communications across data networks
Analyze the application and operation of TCP mechanisms that support reliability
Analyze the application and operation of TCP mechanisms that support reassembly and manage data loss.
Analyze the operation of UDP to support communicate between two processes on end devices
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ITE PC v4.0Chapter 1 3© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Transport Layer Role and Services Explain the purpose of the Transport layer
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ITE PC v4.0Chapter 1 4© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
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
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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 Identify how a port number is represented and describe
the role port numbers play in the TCP and UDP protocols.
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Transport Layer Role and Services Describe the role of segments in the transport layer and
the two principle ways segments can be marked for reassembly.
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ITE PC v4.0Chapter 1 9© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Application and Operation of TCP Mechanisms Trace the steps that show how the TCP reliability
mechanism works as part of a session
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ITE PC v4.0Chapter 1 10© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Application and Operation of TCP Mechanisms Describe the role of port numbers in establishing TCP
sessions and directing segments to server process
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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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Application and Operation of TCP Mechanisms Trace the steps in the handshake in the termination of
TCP sessions
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ITE PC v4.0Chapter 1 13© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
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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ITE PC v4.0Chapter 1 14© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
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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ITE PC v4.0Chapter 1 15© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Managing TCP Sessions Describe the retransmission.remedy for lost data
employed by TCP
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Managing TCP Sessions Describe the mechanisms in TCP that manage the
interrelationship between window size, data loss and congestion during a session
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ITE PC v4.0Chapter 1 17© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
UDP Protocol Describe the characteristics of the UDP protocol and
the types of communication for which it is best suited
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ITE PC v4.0Chapter 1 18© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
UDP Protocol Describe in detail the process specified by the UDP
protocol to reassemble PDUs at the destination device
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ITE PC v4.0Chapter 1 19© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
UDP Protocol Describe how servers use port numbers to identify a
specified application layer process and direct segments to the proper service or application
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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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ITE PC v4.0Chapter 1 22© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public