csc339 computer communications & networks qaisar javaid, assistant professor ciit
TRANSCRIPT
CSC339Computer
Communications&
Networks
Qaisar Javaid, Assistant Professor CIIT
Instructor: Qaisar Javaid
Assistant Professor & Head Networking Department
Instructor’s IntroductionInstructor’s Introduction
PhD Computer Science (In Progress)
MS Computer Science
MBA-Telecom Management
BS Computer Science
Microsoft Certified Trainer (MCT)
Cisco Certified Academy Instructor (CCAI)
Instructor’s IntroductionInstructor’s IntroductionCisco CertificationsCisco Certifications
Cisco Certified Internet Expert (CCIE)Cisco Systems USA
Cisco Certified Network Professional (Cisco Systems USA)
Cisco Certified Design Professional(Cisco Systems USA)
Cisco Certified Security Specialist (Cisco Systems USA)
Instructor’s IntroductionInstructor’s IntroductionMicrosoft CertificationsMicrosoft Certifications
Microsoft Certified System Engineer (MCSE)Microsoft Systems USA
Microsoft Certified Database Administrator (MCDBA) Microsoft Systems USA
Microsoft Certified System AdministratorMicrosoft Systems USA
Microsoft Certified Solution DeveloperMicrosoft Systems USA
Instructor’s ExperienceInstructor’s Experience
Operations Manager (Warid Telecom) 2003-2004
Manager Networks (BTC) 2004-2005
Project Manager (International Islamic University) 2005-2006
Assistant Professor & Head Cisco Networking (COMSATS University) 2006-2007
Head Cisco Networking & Assistant Professor (IIUI) 2007-to date
Course MaterialReference books
Many textbooks on CCN may be consulted
Data Communications & Networking, 4th edition by Behrouz A. Forouzan
Case Studies
RFCs and Internet drafts for Internet
Web resources
Tutorials, white papers, reports, etc.
Grading Policy
Assignments 10% Late assignments are not accepted
Quizzes 10%
Midterm exam 20%
Final exam 60%
Academic Honesty Your work in this class must be your own
If students are found to have collaborated excessively or to have cheated (e.g. by copying or sharing answers during an examination), all involved will at a minimum receive grades of 0 for the first infraction
Further infractions will result in failure in the course.
Prerequisites Prerequisites
Required: Introduction to Computing
Good knowledge of Computers
Recommended:
Basic Computer Programming Concepts
Expectations Expectations
What do you want (or expect) to learn from this course ?
Course ContentsCourse Contents Introduction
Network Models
Data & Signals
Digital Transmission
Transmission Media
Error Detection & Correction
Data Link Control
Course ContentsCourse Contents Wired LANs: Ethernet
Wireless LANs
Network Layer: Logical Addressing
Internet Protocols
Network Layer: Delivery, Forwarding , and Routing
Transport Layer
Course ContentsCourse Contents Switching & Vlans
Application Layer
1.15
Chapter 1
Introduction
Computer Communication & Networks
1.16
1-1 DATA COMMUNICATIONS1-1 DATA COMMUNICATIONS
The term The term telecommunicationtelecommunication means communication at a means communication at a distance. The word distance. The word datadata refers to information presented refers to information presented in whatever form is agreed upon by the parties creating in whatever form is agreed upon by the parties creating and using the data. and using the data. Data communicationsData communications are the are the exchange of data between two devices via some form of exchange of data between two devices via some form of transmission medium such as a wire cable. transmission medium such as a wire cable.
ComponentsData RepresentationData Flow
Topics discussed in this section:Topics discussed in this section:
1.17
Figure 1.1 Five components of data communication
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Figure 1.2 Data flow (simplex, half-duplex, and full-duplex)
1.19
1-2 NETWORKS1-2 NETWORKS
A A networknetwork is a set of devices (often referred to as is a set of devices (often referred to as nodesnodes) ) connected by communication connected by communication linkslinks. A node can be a . A node can be a computer, printer, or any other device capable of sending computer, printer, or any other device capable of sending and/or receiving data generated by other nodes on the and/or receiving data generated by other nodes on the network.network.
Distributed ProcessingNetwork CriteriaPhysical StructuresNetwork ModelsCategories of NetworksInterconnection of Networks: Internetwork
Topics discussed in this section:Topics discussed in this section:
1.20
Figure 1.3 Types of connections: point-to-point and multipoint
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Figure 1.4 Categories of topology
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Figure 1.5 A fully connected mesh topology (five devices)
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Figure 1.6 A star topology connecting four stations
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Figure 1.7 A bus topology connecting three stations
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Figure 1.8 A ring topology connecting six stations
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Figure 1.9 A hybrid topology: a star backbone with three bus networks
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Figure 1.10 An isolated LAN connecting 12 computers to a hub in a closet
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Figure 1.11 WANs: a switched WAN and a point-to-point WAN
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Figure 1.12 A heterogeneous network made of four WANs and two LANs
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1-3 THE INTERNET1-3 THE INTERNET
The The InternetInternet has revolutionized many aspects of our daily has revolutionized many aspects of our daily lives. It has affected the way we do business as well as the lives. It has affected the way we do business as well as the way we spend our leisure time. The Internet is a way we spend our leisure time. The Internet is a communication system that has brought a wealth of communication system that has brought a wealth of information to our fingertips and organized it for our use. information to our fingertips and organized it for our use.
A Brief HistoryThe Internet Today (ISPs)
Topics discussed in this section:Topics discussed in this section:
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Figure 1.13 Hierarchical organization of the Internet
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1-4 PROTOCOLS AND STANDARDS1-4 PROTOCOLS AND STANDARDS
In this section, we define two widely used terms: In this section, we define two widely used terms: protocolsprotocols and and standardsstandards. First, we define protocol, which is . First, we define protocol, which is synonymous with rule. Then we discuss standards, which synonymous with rule. Then we discuss standards, which are agreed-upon rules.are agreed-upon rules.
ProtocolsStandardsStandards OrganizationsInternet Standards
Topics discussed in this section:Topics discussed in this section: