1. ECE 374: Computer Networks & Internet Introduction Spring 2015 Prof. Michael Zink

2. 2 ECE Department Overview  Logistics  Course Requirements  Reading Material  Course Organization  Web Site  Course Overview

3. 3 ECE Department Logistics  Schedule: Monday, Wednesday, Friday 12:20AM – 1:10PM  Elab 303  Office hours: Thursday 4:00PM – 5:00PM, Knowles Engineering Building 209F, Phone: 5-4465, zink@ecs.umass.eduzink@ecs.umass.edu  TAs: Ye Xu, KEB 310Divyashri Bhat, KEB XXX Office hours: Office hours: Monday’s 4PM – 6PMWednesday’s 3PM – 5PM yxu@ecs.umass.edudivyashri.bhat@gmail.com yxu@ecs.umass.edu

4. 4 ECE Department Course Requirements  E&C-ENG 122 (or CMPSCI 121) &  E&C-ENG 242 (or CMPSCI 187)

5. 5 ECE Department Reading Material  Text: Computer Networking: A Top Down Approach Featuring the Internet, J. Kurose & K. Ross, Addison Wesley, 6th ed., 2012  Class notes

6. 6 ECE Department Web Page  Course web page: http://www.ecs.umass.edu/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!!

7. 7 ECE Department Course Info  Workload: * 25% each if you don’t take final. ** This can be taken as an alternative to the final. CourseworkAmount% Grade Written homework525% Lab assignments525% 1 st Midterm15% * 2 nd Midterm15% * Final20% Extra Credit220% **

8. 8 ECE Department Course Info  ASK QUESTIONS!!!! Let us be interactive! Chime in if you have something interesting to add.  Incomplete policy  Academic honesty

9. 9 ECE Department Exams  Midterm 1: Monday, February 25th, 7-9pm (planned)  Midterm 2: Tuesday, April 8th, 7-9pm (planned)  Final: TBD

10. 10 ECE Department Course Overview Part 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

11. 11 ECE Department A top-down Approach Networking 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

12. 12 ECE Department Course Overview Part 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

13. 13 ECE Department Course Overview Part 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

14. 14 ECE Department Course Overview Part 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

15. 15 ECE Department Course Overview Part 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)

16. 16 ECE Department Course Overview Part 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

17. 17 ECE Department Course Overview Part 7: Multimedia Networking (5 classes, text: Ch. 7)  applications, streaming audio and video  best effort  protocols for real-time interactive applications  multiple classes of service  streaming and content distribution in today's Internet

18. 18 ECE Department Course Overview Part 8: 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