Module 1: Reviewing the Suite of

TCP/IP Protocols

Overview

Overview of the OSI Model

Overview of the TCP/IP Protocol Suite

Viewing Frames Using Network Monitor

Lesson: Overview of the OSI Model

What Is the OSI Model?

The Layers of the OSI Model

What Is the OSI Model?

In the OSI model:

Each layer has a defined networking function

Each layer communicates with the layer above and below it

Layer seven provides services for programs to gain access to the network

Layers one and two define the network’s physical media and related tasks

ApplicationApplication

PresentationPresentation

SessionSession

TransportTransport

NetworkNetwork

Data-LinkData-Link

PhysicalPhysical

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Multimedia: The Layers of the OSI Model

ApplicationApplication

PresentationPresentation

SessionSession

TransportTransport

NetworkNetwork

Data-LinkData-Link

PhysicalPhysical

All

People

Seem

To

Need

Data

Processing

Practice: Putting the Layers of the OSI Model in Order

In this practice, you will put the layers of the OSI model in their correct order

Lesson: Overview of the TCP/IP Protocol Suite

Why Do I Need to Know About TCP/IP?

What Is the Architecture of the TCP/IP Protocol Suite?

How Does the TCP/IP Model Relate to the OSI Model?

How an IP Packet Moves Through the Suite of TCP/IP Protocols

Multimedia: Why Do I Need to Know About TCP/IP?

You need to understand the addressing scheme of your network to correctly configure client computers to access it using TCP/IP

You need to know the locations of the windows where you enter the TCP/IP information

You must be able to find the TCP/IP information that you use to configure client computers

What Is the Architecture of the TCP/IP Protocol Suite?

TransportTransport

InternetInternet

LinkLink

ApplicationApplication

EthernetFrame Relay

Token Ring ATM

HTTPHTTP FTPFTP SMTPSMTP DNSDNS RIPRIP SNMPSNMP

TCP/IP Protocol Suite

TCPTCP UDPUDP

IPIPARPARPIGMPIGMP ICMPICMP

TCP/IP Protocol SuiteTCP/IPOSI

How Does the TCP/IP Model Relate to the OSI Model?

TCPTCP UDPUDP

ARPARP IGMPIGMP ICMPICMPIP

EthernetEthernet Frame Relay

Frame Relay

Token Ring

Token Ring ATMATM

ApplicationApplication

TransportTransport

LinkLink

HTTPHTTP FTPFTP SMTPSMTP

DNSDNS RIPRIP SNMPSNMP

ApplicationApplication

TransportTransport

NetworkNetwork

Data-LinkData-Link

PresentationPresentation

SessionSession

PhysicalPhysical

InternetInternet

Multimedia: How an IP Packet Moves Through the Suite of TCP/IP Protocols

The Four Layers of the TCP/IP Protocol Suite:

Application

Transport

Internet

Link

Practice: Associating the Protocols and Layers of the TCP/IP Model

In this practice, you will associate the protocols and layers of the TCP/IP model

Lesson: Viewing Frames Using Network Monitor

What Is Ping?

What Is Network Monitor?

How to Capture Frames

How to Filter for Select Frames

Examining Captured Network Traffic

ServerServerClient ComputerClient Computer

You can run Ping from a client computer to test the connection to any host, such as a printer or a server:

The server sends an Echo Reply back to the client computer

The client computer sends an Echo Request to the server

You check the details of the Echo Reply to determine the quality of the connection

Pinging LONDON (192.168.2.10) with 32 bytes of data: Reply from 192.168.2.10: bytes=32 time<10ms TTL=128Reply from 192.168.2.10: bytes=32 time<10ms TTL=128Reply from 192.168.2.10: bytes=32 time<10ms TTL=128Reply from 192.168.2.10: bytes=32 time<10ms TTL=128 Ping statistics for 192.168.2.10:Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),Approximate round trip times in milli-seconds:Minimum = Oms, Maximum = Oms, Average = Oms

What Is Ping?

What Is Network Monitor?

Network Monitor:

Captures a sample of network traffic

Uses filters to select specific packets

Decodes the packets in the language of the individual protocols

Compiles network statistics

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Practice: Installing Network Monitor

In this practice, you will install Network Monitor

Your instructor will demonstrate how to use Network Monitor to capture framesYour instructor will demonstrate how to use Network Monitor to capture frames

How to Capture Frames

Practice: Capturing Frames

In this practice, you will use Network Monitor to capture frames

Your instructor will demonstrate how to filter for select framesYour instructor will demonstrate how to filter for select frames

How to Filter for Select Frames

Examining Captured Network Traffic

Practice: Examining Packets

In this practice, you will:

Examine ICMP Packets

Examine ARP Packets