© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public ITE PC v4.0 Chapter 1 1 Network Services Networking for Home and Small Businesses – Chapter 6
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© 2007 Cisco Systems, Inc. All rights reserved. Cisco PublicITE PC v4.0Chapter 1 1
Network Services
Networking for Home and Small Businesses – Chapter 6
ITE PC v4.0Chapter 1 2© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Objectives Compare and contrast clients and servers and their
interaction over the network.
Describe the type of interactions of Internet applications.
Describe the purpose of a layered model
Illustrate the interaction of various protocols.
ITE PC v4.0Chapter 1 3© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Compare and Contrast Clients and Servers Review the client/server relationship.
ITE PC v4.0Chapter 1 4© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Client-Server Protocols Application, Transport, Internetwork and Network
access protocols.
ITE PC v4.0Chapter 1 5© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
TCP and UDP Transport Protocols Differentiate between acknowledged versus
unacknowledged protocols.
ITE PC v4.0Chapter 1 6© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Port Numbers in Client-Server Conversations Describe the function of a port.
ITE PC v4.0Chapter 1 7© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Types of Interactions of Internet Applications Describe DNS and its purpose.
ITE PC v4.0Chapter 1 8© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Types of Interactions of Internet Applications Describe the interaction between a web client and a
web server.
ITE PC v4.0Chapter 1 9© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Types of Interactions of Internet Applications Describe the interaction between an FTP client and an
FTP server.
ITE PC v4.0Chapter 1 10© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Types of Interactions of Internet Applications Describe the interaction between e-mail clients and e-
mail servers.
ITE PC v4.0Chapter 1 11© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Types of Interactions of Internet Applications Describe the interaction between IM / Peer-to-Peer
clients and e-mail servers.
ITE PC v4.0Chapter 1 12© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Types of Interactions of Internet Applications Describe the interaction between voice clients and
servers.
ITE PC v4.0Chapter 1 13© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Types of Interactions of Internet Applications Well-known
ports
Registered ports
Private ports
ITE PC v4.0Chapter 1 14© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Purpose of a Layered Model Protocols operate as an interdependent stack
Each layer provides and receives services
ITE PC v4.0Chapter 1 15© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Purpose of a Layered Model Describe protocol operation when sending and receiving a
message.
ITE PC v4.0Chapter 1 16© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Purpose of a Layered Model Describe the Open Systems Interconnect Model
ITE PC v4.0Chapter 1 17© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Summary Clients and servers use protocols and standards for
exchanging information.
Client-server services are identified through the use of port numbers.
A protocol stack organizes the protocols in layers, with each layer providing and receiving services from the layers below and above it.
When sending messages, protocols interact from the top layer to the bottom of the stack.
When receiving messages, protocols interact from the bottom layer to the top of the stack.
ITE PC v4.0Chapter 1 18© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
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