Digital Communications II
Principal lecturer: Dr Ian Pratt (firstname.lastname@example.org)
Taken by: Part II
Lecturers: Ian Pratt, Jon Crowcroft
No. of lectures : 16
Prerequisite course: Digital Communication I
This course is a prerequisite for Security (Part II).
This course aims to provide a detailed understanding of how computer
networks operate, through the examples of the Internet, and presents
ways to build such systems. It also covers a selection of topics
which relate to recent trends in digital communications systems.
The material falls roughly into two halves: Protocols, and Technologies.
Course overview. Abstraction, layering. The OSI reference model.
- The Internet: IP.
IP overview/review. Networking in Unix: structures, buffering,
sockets, network interfaces. IP addresses and (simple) routing.
Subnetting. IP checksum. Fragmentation. JAC
- The Internet: routing.
ROADS and CIDR. Terminology: AS, IGP, EGP. Routing protocols: distance
vector versus link state. Examples: RIP, OSPF. AS routing:
I-BGP/E-BGP, metrics. JAC
- The Internet: IPv6.
Concepts. Internet multicast model. Applications. Basic implementation.
Refinements. Congestion control. RJB
- The Internet: network resource management.
Differentiated and Integrated Services. Signaling (RSVP) and
Admission Control, Forwarding and Scheduling, Policing and Shaping.
The future. JAC
- The Internet: multicast and QoS routing.
Other TCP details. Internet multicast model.
Applications. Basic implementation. Refinements. JAC
- The Internet: UDP, TCP
TCP operation, state transitions. Handling loss: acks and retransmissions.
Estimating RTT. Basic congestion control. Improving things: TCP
vegas, SACKs, ECN. [JAC, 2 lectures]
- The Internet: Applications, Multimedia, NFS & HTTP
RTP operation, Playout adaption; RPC & Network File Systems;
HTTP, HTTP 1.1 - making it all work JAC
- ATM case study
Multiplexing and virtual circuits. Signalling. ATM Adaption
Layers. Quality of Service CBR, VBR, ABR. IAP
- Wide Area Networks.
Fibre Technology. Long-haul link design. Dense Wave Division
Multiplexing. Sonet/SDH. MPLS. Packet over SONET. Optical switching. IAP
- Access Networks.
Cable Modems. xDSL. Fixed wireless. Satellite. Firewalls and Network
Address Translation. IAP
- Local Area Networks and System Area Networks.
Fast/Gigabit Ethernet. Optimising latency. Host interface
design. User-space protocol processing. IAP
- Congestion Pricing.
Model and motivation. Practical considerations. The future. DRM
- Additional Topics. To be announced. IAP+
At the end of the course students should be able to
- enumerate and explain the layers of the OSI reference model
- compare and contrast connectionless and connection-oriented
- explain how IP routing works
- describe the components of the Internet resource management system
- describe how and why TCP attempts to handle congestion in the
Srinivsan Keshav. (1997).
An Engineering Approach to Computer Networking.
Addison-Wesley Pub Co; (1st ed.); ISBN: 0201634422
Alternative to Keshav:
Bruce S. Davie & Larry L. Peterson & David Clark (1999).
Computer Networks: A Systems Approach.
Morgan Kaufmann Publishers (2nd ed.); ISBN: 1558605142
W. Richard Stevenes (1994)
TCP/IP Illustrated, Volume 1: The Protocols.
Addison-Wesley Pub Co, (1st ed.); ISBN: 0201633469
Alternative to Stevens:
Douglas Comer (2000).
Internetworking with TCP/IP Vol. I: Principles, Protocols, and Architecture
Prentice Hall (4th ed.); ISBN: 0130183806
Balachander Krishnamurthy & Jennifer Rexford (2001)
Web Protocols and Practice: HTTP/1.1, Networking Protocols, Caching, and Traffic Measurement.
Addison-Wesley Pub Co (1st ed.); ISBN: 0201710889
The past exam questions are also on-line.
Generated at 18:01.29 on 18/9/2000