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Computer communications and networks
This document outlines the structure and content of a module on computer communications and networks. The module aims to provide an understanding of networking principles, technologies, and protocols. It is divided into four parts that cover: data transmission basics, packet transmission and local area networks, internetworking concepts and protocols like IP and TCP, and finally network applications. Assessment will involve a two hour written exam based on previous years' papers, with no coursework required.
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Computer communications and networks
- 1. Computer Communications and Networks Email: vj2713@gmail.com
- 2. Introduction Practical matters Module goals, structure and contents Initial introduction to some key ideas and issues
- 3. Lectures Tuesday 17:00 in LT3 Friday 13:00 in LT2
- 4. Related modules G53ACC - Advanced Computer Communications G5BIAW - The Internet and the World Wide Web
- 5. Objectives To understand the basic principles of data communications and computer networks. To appreciate the complex trade-offs that are inherent in the design of networks. To provide a guided tour of network technologies from the lowest levels of data transmission up to network applications. To learn about current networking technologies, especially Internet protocols.
- 6. Assessment Two hour written examination The style of question will be based upon those from previous years. Their content will of course be different. Last year’s exam paper is on sale in the bookshop and previous papers are in the library. No coursework
- 7. Text books andnotes Notes are available at: http://www.cs.nott.ac.uk/~mvr/ccn The core recommended course text is: Computer Networks and Internets, Douglas E. Comer, Prentice Hall Supplementary texts are: Tannenbaum, Computer Networks, Prentice Hall Halsall, Data and Computer Communications, Macmillan
- 8. What is acomputer network? An interconnection of autonomous computers (as opposed to communication between separate but interdependent parts of a single computer)
- 9. Some goals ofcomputer networks Access to remote resources Human communication Mobile computing Computing power through parallelism Optimising resources - load balancing Incremental growth of computer systems (reduced cost and risk) Increased robustness through graceful degradation
- 10. Uses of computernetworks Email, World Wide Web, Video Conferencing, File Transfer, Collaborative Virtual Environments, Remote control of robots and machines, Dial up databases, Webcasting, Distributed Programs, Hacking, Banking, Internet telephone
- 11. Classifying networks By size Local area networks (LANs) versus Wide area networks (WANs) By connectivity Point to point versus broadcast networks By communication medium By mobility Fixed versus mobile
- 12. Size - differencesbetween local and wide area networks ‘Speed’ - bandwidth and latency Management Security Reliability Billing Heterogeneity (and standards)
- 13. Connectivity - pointto point networks tree star irregular mesh
- 14. Connectivity - broadcast networks satellite/radio wire
- 15. Medium - differencesbetween communication media ‘Speed’ - bandwidth and latency Range Sharing Topology Installation and maintenance costs Reliability
- 16. Mobility - issuesarising in mobile networks Mobile networking has emerged in the last decade. Introduces new issues of: energy efficiency location and tracking semi-persistent connections complex administration and billing as devices and users move around the network
- 17. Common issues innetworking Addressing Routing Framing and encoding Error detection and correction Flow and congestion
- 18. Module contents andstructure Part 4: applications Part 3: internetworking Part 2: packet transmission Part 1: data transmission
- 19. Part 1: datatransmission Transmission media; Local asynchronous communication (RS-232); Long distance communication (modems and carriers)
- 20. Part 2: packettransmission Packets, frames and error detection Local area networks (LANs) Hardware addressing LAN wiring and physical topology Extending LANS: Fiber Modems, repeaters, bridges and switches; WAN Technologies and routing Network ownership and service paradigm Protocols and layering
- 21. Part 3: internetworking Concepts, architecture and protocols IP addresses Binding protocol addresses (ARP) IP Datagrams and datagram forwarding IP encapsulations, fragmentation and reassembly The future of IP An error reporting mechanism (ICMP) TCP (reliable transport service)
- 22. Part 4: applications Client-server interaction The socket interface Example applications