{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

chapter 01 - Chapter 1 Network Models(OSI and TCP/IP 2.1...

Info iconThis preview shows pages 1–13. Sign up to view the full content.

View Full Document Right Arrow Icon
2.1 Chapter 1 Network Models (OSI and TCP/IP)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2.2 1-1 LAYERED TASKS 1-1 LAYERED TASKS We use the concept of We use the concept of layers layers in our daily life. As an in our daily life. As an example, let us consider two friends who communicate example, let us consider two friends who communicate through postal mail. The process of sending a letter to a through postal mail. The process of sending a letter to a friend would be complex if there were no services friend would be complex if there were no services available from the post office. available from the post office. Sender, Receiver, and Carrier Hierarchy Topics discussed in this section: Topics discussed in this section:
Background image of page 2
2.3 Figure 1.1 Tasks involved in sending a letter
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2.4 1-2 THE OSI MODEL 1-2 THE OSI MODEL Established in 1947, the International Standards Established in 1947, the International Standards Organization ( Organization ( ISO ISO ) is a multinational body dedicated to ) is a multinational body dedicated to worldwide agreement on international standards. worldwide agreement on international standards. An ISO standard that covers all aspects of network An ISO standard that covers all aspects of network communications is the Open Systems Interconnection communications is the Open Systems Interconnection ( ( OSI OSI ) model. ) model. It was first introduced in the late 1970s. It was first introduced in the late 1970s. Layered Architecture Peer-to-Peer Processes Encapsulation Topics discussed in this section: Topics discussed in this section: ISO is the organization. OSI is the model. Note
Background image of page 4
2.5 Figure 1.2 Seven layers of the OSI model
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2.6 Figure 1.3 The interaction between layers in the OSI model
Background image of page 6
2.7 Figure 1.4 An exchange using the OSI model
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2.8 1.3 LAYERS IN THE OSI MODEL 1.3 LAYERS IN THE OSI MODEL In this section we briefly described the functions of each In this section we briefly described the functions of each layer in the OSI model. layer in the OSI model. Physical Layer Data Link Layer Network Layer Transport Layer Session Layer Presentation Layer Application Layer Topics discussed in this section: Topics discussed in this section:
Background image of page 8
2.9 Figure 1.5 Physical layer
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2.10 The physical layer is responsible for movements of individual bits from one hop (node) to the next. Note The responsibility of physical layer is to coordinate the functions required to transmit a bit stream over a physical medium 􀂄 The duties are 􀂄 Defines the characteristics of the interface between devices and transmission medium 􀂄 Type of transmission medium, topology, etc… 􀂄 Representation of bits 􀂄 Encoding, voltage level, duration etc… 􀂄 Data rate 􀂄 Synchronization of bits 􀂄 Sender’s and receiver’s clock synchronization
Background image of page 10
2.11 Figure 1.6 Data link layer
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2.12
Background image of page 12
Image of page 13
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}