ECE 374:Computer Networks & Internet

IntroductionSpring 2012

Prof. Michael Zink

2ECE Department

Overview Logistics Course Requirements Reading Material Course Organization Web Site A few remarks on systems Systems Engineering INCOSE

3ECE Department

Logistics

Schedule: Monday, Wednesday, Friday 12:20AM – 1:10PM

Elab 323 Office hours: Thursday 4:00PM – 5:00PM, Good?

Knowles Engineering Building 113B, Phone: 5-4465, zink@ecs.umass.edu

4ECE Department

Course Requirements E&C-ENG 122 (or CMPSCI 121) & E&C-ENG 242 (or CMPSCI 187)

5ECE Department

Reading Material

Text: Computer Networking: A Top Down Approach Featuring the Internet, J. Kurose & K. Ross, Addison Wesley, 6th ed., 2012

Class notes

6ECE Department

Web Page Course web page:

http://server.casa.umass.edu/~zink/ECE374/

Write this information down!!!

All information for this course is posted on this side:• Schedule• Office hours• Class notes• Assignments• .. no hand outs in class!!

7ECE Department

Course Info Workload:

* 25% each if you don’t take final!Coursework Amount % GradeWritten homework 5 25%Lab assignments 5 25%1st Midterm 15%*

2nd Midterm 15%*

Final 20%Extra Credit 10%

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Course Info ASK QUESTIONS!!!!

• Let us be interactive!• Chime in if you have something interesting to add.

Incomplete policy Academic honesty

9ECE Department

Exams Midterm 1: Monday, March 4th, 7-9pm (planned) Midterm 2: Friday, April 16th, 7-9pm (planned)

Final: TBD

10ECE Department

Course OverviewPart 1: Introduction (3 classes, text: Chapter 1) what is the Internet, What is a protocol? network edge, network core, network access physical media delay, loss, throughput in packet-switched

networks protocol layers, service models Internet backbones, NAPs and ISPs brief history of networking, Internet

11ECE Department

A top-down ApproachNetworking will be covered

top-down: end-system: applications,

end-end transport network core: routing,

hooking nets together link-level protocols: e.g.,

Ethernet other stuff: security,

mobility, management

12ECE Department

Course OverviewPart 2: Application Layer (4 classes, text: Ch. 2) principles of application-layer protocols World Wide Web: HTTP file transfer: FTP electronic mail in the Internet the Internet's directory service: DNS P2P: Skype socket programming

13ECE Department

Course OverviewPart 3: Transport Layer (6 classes, text Ch. 3) Transport-layer services and principles Multiplexing and demultiplexing applications Connectionless transport: UDP Principles of reliable of data transfer TCP case study Principles of congestion control TCP congestion control

14ECE Department

Course OverviewPart 4: Network Layer (5 classes, text: Ch. 4) introduction and network service model what’s inside a router? routing principles (algorithms) hierarchical routing IP: the Internet Protocol Internet routing: RIP, OSPF, BGP

15ECE Department

Course OverviewPart 4: Network Layer (5 classes, text: Ch. 4) introduction and network service model what’s inside a router? routing principles (algorithms) hierarchical routing IP: the Internet Protocol Internet routing: RIP, OSPF, BGP

16ECE Department

Course OverviewPart 5: Link Layer, LANs (4 classes, text: Ch. 5) introduction, services error detection, correction multiple access protocols, LANs LAN addresses, ARP Ethernet network as a link layer: MPLS a day in the life of a web request (synthesis)

17ECE Department

Course OverviewPart 6: Wireless and Mobile Networks (3 classes, Ch

6) wireless link characteristics the wireless link:

802.11 cellular Internet access mobility principles

mobility in practice: mobile IP mobility in cellular networks

18ECE Department

Course OverviewPart 7: Network Security (3 classes, text: Ch. 7) what is network security? principles of cryptography authentication: Who are you? integrity key distribution, certification firewalls attacks, countermeasures case studies: secure e-mail, SSL, IPsec, 802.11