Chapter 2 Networking Standards and the OSI Model. Collected and Compiled By JD Willard MCSE, MCSA, Network+, Microsoft IT Academy Administrator Computer Information Systems Instructor Albany Technical College. Attention: Accessing Demos. This course presents many demos.
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Collected and Compiled
By JD Willard
MCSE, MCSA, Network+,
Microsoft IT Academy Administrator
Computer Information Systems Instructor
Albany Technical College
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What is the OSI Model?DemoThe OSI Model
The OSI Model Demo
OSI Layer Down Up
Overview of Layered Architecture Demo
The layers of the model Demo
Upper Layers Demo
Lower Layers Demo
Flow of data through the OSI Model
Each successive layer adds formatting and peer control information to the data in the form of a header. At the receiving end the headers are stripped off by the corresponding layers to determine how to handle the data. At the Data Link layer an error checking mechanism known as the Frame check sequence is added as a trailer.
The Application Layer Demo
The Presentation Layer Demo
The Session Layer Demo
The Transport Layer Demo
Segmentation and Reassembly
The Network Layer Demo
The Data Link Layer Demo
A NIC’s MAC address
The Physical Layer Demo
Data transformation through the OSI Model
TCP/IP and OSI Models Demo
The TCP/IP suite of protocols can be divided into four layers that roughly correspond
to the seven layers of the OSI Model.
■ Applicationlayer—Roughly equivalent to the Application, Presentation, and
Session layers of the OSI Model. Applications gain access to the network
through this layer, via protocols such as the File Transfer Protocol (FTP),
Trivial File Transfer Protocol (TFTP), Hypertext Transfer Protocol (HTTP),
Simple Mail Transfer Protocol (SMTP), and Dynamic Host Configuration
■ Transport layer—Roughly corresponds to the Transport layer of the OSI
Model. This layer holds the Transmission Control Protocol (TCP) and User
Datagram Protocol (UDP), which provide flow control, error checking, and
sequencing. All service requests use one of these protocols.
■ Internet layer—Equivalent to the Network layer of the OSI Model. This layer
holds the Internet Protocol (IP), Internet Control Message Protocol (ICMP),
Internet Group Message Protocol (IGMP), and Address Resolution Protocol
(ARP). These protocols handle message routing and host address resolution.
■ Network Interface layer—Roughly equivalent to the Data Link and Physical
layers of the OSI Model. This layer handles the formatting of data and transmission
to the network wire.