Overview Classification of Different Network “Types ...

Introduction

OverviewClassification of Different Network “Types”Layered Network ArchitectureDefinitions

Objective“Big Picture” - Details LaterRead Chapter 1 in Textbook

CSC358 - Introduction to Computer Networks

Introduction

OverviewClassification of Different Network “Types”Layered Network ArchitectureDefinitions

Objective“Big Picture” - Details LaterRead Chapter 1 in Textbook

CSC358 - Introduction to Computer Networks

Introduction

OverviewClassification of Different Network “Types”Layered Network ArchitectureDefinitions

Objective“Big Picture” - Details LaterRead Chapter 1 in Textbook

CSC358 - Introduction to Computer Networks

What is a Computer Network?

Goal: Provides service(s) that allow to send informationfrom one host to another host.Information: Data, Video, Voice, Sound, Graphics,...Service:

Network Infrastructure (Hardware)Protocols (Software)

Useful Analogy: Postal Service

CSC358 - Introduction to Computer Networks

What is a Computer Network?

Goal: Provides service(s) that allow to send informationfrom one host to another host.Information: Data, Video, Voice, Sound, Graphics,...Service:

Network Infrastructure (Hardware)Protocols (Software)

Useful Analogy: Postal Service

CSC358 - Introduction to Computer Networks

What is a Computer Network?

Goal: Provides service(s) that allow to send informationfrom one host to another host.Information: Data, Video, Voice, Sound, Graphics,...Service:

Network Infrastructure (Hardware)Protocols (Software)

Useful Analogy: Postal Service

CSC358 - Introduction to Computer Networks

What is a Computer Network?

Goal: Provides service(s) that allow to send informationfrom one host to another host.Information: Data, Video, Voice, Sound, Graphics,...Service:

Network Infrastructure (Hardware)Protocols (Software)

Useful Analogy: Postal Service

CSC358 - Introduction to Computer Networks

What is a Computer Network?

Goal: Provides service(s) that allow to send informationfrom one host to another host.Information: Data, Video, Voice, Sound, Graphics,...Service:

Network Infrastructure (Hardware)Protocols (Software)

Useful Analogy: Postal Service

CSC358 - Introduction to Computer Networks

What is a Computer Network?

Goal: Provides service(s) that allow to send informationfrom one host to another host.Information: Data, Video, Voice, Sound, Graphics,...Service:

Network Infrastructure (Hardware)Protocols (Software)

Useful Analogy: Postal Service

CSC358 - Introduction to Computer Networks

What is a Computer Network?

Goal: Provides service(s) that allow to send informationfrom one host to another host.Information: Data, Video, Voice, Sound, Graphics,...Service:

Network Infrastructure (Hardware)Protocols (Software)

Useful Analogy: Postal Service

CSC358 - Introduction to Computer Networks

Overview

CSC358 - Introduction to Computer Networks

Overview

Hosts/End-Systems run Network ApplicationsSwitches/Routers/Nodes and Links connectEnd-SystemsEnd-Systems and Routers use Protocols to communicate

FTP,TCP,IP

“Services” (Protocols) can be Connection-Oriented orConnectionless.There are many different network architectures(“hardware”) and protocols (“software”)

CSC358 - Introduction to Computer Networks

Overview

Hosts/End-Systems run Network ApplicationsSwitches/Routers/Nodes and Links connectEnd-SystemsEnd-Systems and Routers use Protocols to communicate

FTP,TCP,IP

“Services” (Protocols) can be Connection-Oriented orConnectionless.There are many different network architectures(“hardware”) and protocols (“software”)

CSC358 - Introduction to Computer Networks

Overview

Hosts/End-Systems run Network ApplicationsSwitches/Routers/Nodes and Links connectEnd-SystemsEnd-Systems and Routers use Protocols to communicate

FTP,TCP,IP

“Services” (Protocols) can be Connection-Oriented orConnectionless.There are many different network architectures(“hardware”) and protocols (“software”)

CSC358 - Introduction to Computer Networks

Overview

Hosts/End-Systems run Network ApplicationsSwitches/Routers/Nodes and Links connectEnd-SystemsEnd-Systems and Routers use Protocols to communicate

FTP,TCP,IP

“Services” (Protocols) can be Connection-Oriented orConnectionless.There are many different network architectures(“hardware”) and protocols (“software”)

CSC358 - Introduction to Computer Networks

SMTP (Simple Mail Transfer Protocol)S: 220 sf.com

C: HELO toronto.eduS: 250 Hello toronto.edu, pleased to meet you

C: MAIL FROM: <[email protected]>S: 250 [email protected]... Sender ok

C: RCPT TO: <[email protected]>S: 250 [email protected] ... Recipient ok

C: DATAS: 354 Enter mail, end with "." on a line by itself

C: How are you?C: See you soon.C: .

S: 250 Message accepted for deliveryC: QUIT

S: 221 sf.com closing connection

CSC358 - Introduction to Computer Networks

Classification

Scope of the NetworksPersonal Area Networks (PAN)Local Area Networks (LAN)Metropolitan Area Networks (MAN)Wide Area Networks (WAN)

CSC358 - Introduction to Computer Networks

Classification

Scope of the NetworksPersonal Area Networks (PAN)Local Area Networks (LAN)Metropolitan Area Networks (MAN)Wide Area Networks (WAN)

CSC358 - Introduction to Computer Networks

Classification

Scope of the NetworksPersonal Area Networks (PAN)Local Area Networks (LAN)Metropolitan Area Networks (MAN)Wide Area Networks (WAN)

CSC358 - Introduction to Computer Networks

Classification

Scope of the NetworksPersonal Area Networks (PAN)Local Area Networks (LAN)Metropolitan Area Networks (MAN)Wide Area Networks (WAN)

CSC358 - Introduction to Computer Networks

Classification

Scope of the NetworksPersonal Area Networks (PAN)Local Area Networks (LAN)Metropolitan Area Networks (MAN)Wide Area Networks (WAN)

CSC358 - Introduction to Computer Networks

Classification

Transmission TechnologyShard-Media-Broadcast NetworksSwitched Point-to-Point Networks

CSC358 - Introduction to Computer Networks

Classification

Transmission TechnologyShard-Media-Broadcast NetworksSwitched Point-to-Point Networks

CSC358 - Introduction to Computer Networks

Shared-Media-Broadcast Networks

End-Systems share a common channel

CSC358 - Introduction to Computer Networks

Shared-Media-Broadcast Networks

Examples:

Advantages:

Disadvantages:

CSC358 - Introduction to Computer Networks

Point-to-Point Networks

Information (Packet) travels over several nodes from one hostto another host.

CSC358 - Introduction to Computer Networks

Point-to-Point Networks

Examples:

Advantages:

Disadvantages:

CSC358 - Introduction to Computer Networks

Classification

Switched Point-to-Point NetworksCircuit-Switched NetworksPacket-Switched Networks

CSC358 - Introduction to Computer Networks

Classification

Switched Point-to-Point NetworksCircuit-Switched NetworksPacket-Switched Networks

CSC358 - Introduction to Computer Networks

Circuit-Switched Networks

A (dedicated) share of the network capacity is allocated to eachsession (connection).

CSC358 - Introduction to Computer Networks

Circuit-Switched Networks

Examples:

Advantages:

Disadvantages:

CSC358 - Introduction to Computer Networks

Packet-Switched Networks

Sessions share network resources.

CSC358 - Introduction to Computer Networks

Packet-Switched Networks

Examples:

Advantages:

Disadvantages:

CSC358 - Introduction to Computer Networks

Classification

Packet-Switched NetworksConnection-Oriented Packet-Switched NetworksConnectionless Packet-Switched Networks

CSC358 - Introduction to Computer Networks

Classification

Packet-Switched NetworksConnection-Oriented Packet-Switched NetworksConnectionless Packet-Switched Networks

CSC358 - Introduction to Computer Networks

Connection-Oriented Packet-Switched Networks

All packets generate by a session follow the same path.

CSC358 - Introduction to Computer Networks

Connection-Oriented Packet-Switched Networks

Examples:

Advantages:

Disadvantages:

CSC358 - Introduction to Computer Networks

Connectionless Packet-Switched Networks

Packets of a session can follow different paths.

CSC358 - Introduction to Computer Networks

Connectionless Packet Switched Networks

Examples:

Advantages:

Disadvantages:

CSC358 - Introduction to Computer Networks

Question

What is the difference between a circuit-switched network anda connection-oriented packet-switched network?

CSC358 - Introduction to Computer Networks

Typical Network

CSC358 - Introduction to Computer Networks

Sessions

Interactive: Short messages, small delay, high reliabilityFile transfer: Long messages, moderate delay, highreliabilityDigitized Voice: Short messages, fixed small delay,moderate reliabilityWeb Traffic: Long messages, small delay, high reliabilityVideo: Long messages, fixed small delay. Requiresbroadcast and multicast capabilities.

CSC358 - Introduction to Computer Networks

Sessions

Interactive: Short messages, small delay, high reliabilityFile transfer: Long messages, moderate delay, highreliabilityDigitized Voice: Short messages, fixed small delay,moderate reliabilityWeb Traffic: Long messages, small delay, high reliabilityVideo: Long messages, fixed small delay. Requiresbroadcast and multicast capabilities.

CSC358 - Introduction to Computer Networks

Sessions

Interactive: Short messages, small delay, high reliabilityFile transfer: Long messages, moderate delay, highreliabilityDigitized Voice: Short messages, fixed small delay,moderate reliabilityWeb Traffic: Long messages, small delay, high reliabilityVideo: Long messages, fixed small delay. Requiresbroadcast and multicast capabilities.

CSC358 - Introduction to Computer Networks

Sessions

Interactive: Short messages, small delay, high reliabilityFile transfer: Long messages, moderate delay, highreliabilityDigitized Voice: Short messages, fixed small delay,moderate reliabilityWeb Traffic: Long messages, small delay, high reliabilityVideo: Long messages, fixed small delay. Requiresbroadcast and multicast capabilities.

CSC358 - Introduction to Computer Networks

Sessions

Interactive: Short messages, small delay, high reliabilityFile transfer: Long messages, moderate delay, highreliabilityDigitized Voice: Short messages, fixed small delay,moderate reliabilityWeb Traffic: Long messages, small delay, high reliabilityVideo: Long messages, fixed small delay. Requiresbroadcast and multicast capabilities.

CSC358 - Introduction to Computer Networks

Sessions

Interactive: Short messages, small delay, high reliabilityFile transfer: Long messages, moderate delay, highreliabilityDigitized Voice: Short messages, fixed small delay,moderate reliabilityWeb Traffic: Long messages, small delay, high reliabilityVideo: Long messages, fixed small delay. Requiresbroadcast and multicast capabilities.

CSC358 - Introduction to Computer Networks

Sessions

Interactive: Short messages, small delay, high reliabilityFile transfer: Long messages, moderate delay, highreliabilityDigitized Voice: Short messages, fixed small delay,moderate reliabilityWeb Traffic: Long messages, small delay, high reliabilityVideo: Long messages, fixed small delay. Requiresbroadcast and multicast capabilities.

CSC358 - Introduction to Computer Networks