COMPUTER NETWORKS CS610 Lecture-1 Hammad Khalid Khan

Course Answers the Basic Question: How do COMPUTER NETWORKS and INTERNET Operate?

Textbook  Title Computer Networks and Internets, with Internet Applications, 4th edition  Author Douglas E. Comer  Publisher Pearson Education  Book website

Reference Books  “Computer Networks” by Andrew S. Tanenbaum, Prentice Hall Publishers  “Networking: A Top-Down Approach Featuring the Internet” by James F. Kurose and Keith W. Ross

Course Composition  Four Main Parts – Using and Building Internet Applications (Chap ) – Data Transmission (Chap ) – Packet Transmission (Chap. 7-16) – Interntworking (Chap ) – Network Applications (Chap )

Part 1: Data Transmission  Transmission Media  Local Asynchronous Communication (RS 232)  Long Distance Communication (Modems and Carriers)

Part 2: Packet Transmission  Packets and Frames  Local Area Networks (LANs) – Hardware Addressing – Ethernet, WLAN and Bluetooth – Extending LANs: Fiber Modems, Repeaters, Bridges, Switches

Part 2: Packet Transmission (Cont’d)  WAN Technologies and Routing  Network Ownership and Service Paradigm  Protocols and Layering

Part 3: Interntworking  Concepts, Architecture and Protocols  IP Addresses  Binding Protocol Addresses

Part 3: Interntworking (Cont’d)  IP Datagrams and Datagram Forwarding  IP Encapsulation, Fragmentation and Reassembly  TCP/IP

Part 4: Network Applications  Client-Server Interaction  The Socket Interface  Example Applications

Grade Distribution  Assignments 15%  Midterm Examination 35%  GMDB 5%  Final Examination 45%

COURSE INTRODUCTION

CHAPTER No. 1 INTRODUCTION

Network and Internet  Network System for connecting computers using a single transmission technology  Internet Set of networks connected by routers that are configured to pass traffic among any computers attached to any network in the set

Classification of Networks  By SIZE  Local Area Network (LAN) versus Wide Area Network (WAN)  By Connectivity  Point-to-Point versus Broadcast  By Communication Medium  By Mobility  Fixed versus Mobile

Networks in Daily Life  Now, networks are an important part of everyday activities  Business  Home  Government  Education

Mastering The Complexity  Concentrate on understanding the concepts  Learning the Networking Terminology (summarized in a Glossary in Appendix 1)

Complexity in Network Systems  Many different technologies exist  No single underlying theory or model  Models are either so simplistic or so complex  No simple or uniform terminology