Office Hours

• 3-4:30 Monday
• 10-11:30 Tuesday
• Also by appointment.

Class Notes

• Lecture 1:
  
  • ISO OSI Model: Physical, Link, Network and Transport Layers
  • LAN's v. WAN's
  • Packet v. Connection
• Lecture 2:
  
  • ISO OSI Model: Session, Presentation and Application Layers
  • SDU's and PDU's, Peer-to-peer protocols
  • Drivel about Ethernet physical layer
  • Layer 3, Routing.
• Lecture 3:
  
  • Design criteria for networks
  • Reliable communication using positive acknowledgement
• Lecture 4:
  • Byte sequence number acknowledgements in the TCP protocol
  • The Socket programming abstraction (introduction)
  • Client-Server discipline, well-known-ports (e.g. 25 SMTP)
• Lecture 5:
  • Socket programming in Java
  • Remote Procedure Calls (very lightly)
• Lecture 6-7:
  • Lecture 6: Java programming help in Ungar 426, Prof. Duncan
  • Lecture 7: individual work.
• Lecture 8:
  • Characteristics of a LAN
  • Token ring and CSMA/CD technology
• Lecture 9:
  • Addresses
  • Ethernet; DIX, 802.3, 802.2 SNAP
• Lecture 10:
  • CSMA/CA: 802.11b - Wi-Fi (see additional reading in Syllabus)
• Lecture 11:
  • Bridges: learning bridges, discussion of problems
• Lecture 12:
  • Presentation of Spanning Tree Protocol
• Lecture 13:
  • Discussion of homework assignment
  • VLAN's
• Lecture 14:
  • Network Layer: connection, connectionless
  • Host (DTE-DCE/ES) and network cloud
  • Telephone network, SS7, example of connection network
  • IP example of connectionless noetwork
  • IP addresses, classes and netmask, broadcast addresses
  • ARP and local delivery for IP.
• Lecture 15
  • More discussion of homework assignment (!!!)
  • IP gateways (routers), L3 delivery for IP.
• Lecture 16
  • IPv4, IPv6 and CLNP packet headers
  • Fragmentation
  • Quality of Service (TOS)
  • Time to Live
  • Options, loose and strict source routing
  • ICMP, traceroute
• Lecture 17
  • Connection network layers
  • Virtual circuits
  • X.25 and ATM
  • (Side remarks about DNS for IP)
• Lecture 18
  • Routing: intradomain, interdomain, border gateways.
  • Distance vector and Link State protocols
  • Dijkstra's algorithm.
• Lecture 19
  • LSP dissemination
• Lecture 20
  • Load splitting, modified Dijkstra
  • Routing on a LAN
• Lecture 21
  • Policy Routing; Level 1 partition
  • RIP and OSPF
• Lecture 22
  • Exterior protocols: EGP, BGP
  • Multicasting
  • Presentation of homework.
• Lecture 23
  • Transport Layer: UDP and TCP
  • Ports, connections in TCP
  • Sequence numbers, window, and acknowledgements in TCP
• Lecture 24
  • review homework assignment
  • TCP SYN.
• Lecture 25
  • TCP FIN, 2MSL wait.
  • Interactive data transmission, delayed ack's
• Lecture 26
  • Interactive data transmission, Nagel algorithm
  • Bulk data transmission, slow start, silly window, and window probe
• Lecture 27
  • Classic UDP services (See RFC 3000, Internet Official Protocol Standards [cached])
  • TFTP: Trivial File Transfer Protocol (RFC 1350 [cached], Sorcerer's Apprentice Bug, RFC 1123, p. 34. [cached])
  • DNS: Domain Name Service (RFC 1034 [cached], RFC 1035 [cached])
• Lecture 28
  • Classic UDP services continued
  • BOOTP: Bootstrap Protocol (RFC 951 [cached], RFC 1534 [cached])
  • DHCP: Dynamic Host Configuration Protocol (RFC 2131 [cached], RFC 2132 [cached])
• Lecture 29
  • Security: Threat model and Stance.
  • Introduction to and motivation for firewalls
• Lecture 30
  • Assign term projects
  • Packet filter rules for L3 firewall
• Lecture 31
  • Various questions, discussion
  • NAT
• Lecture 32
  • PIX configuration, XLATE slots, and so on.
• Lecture 33
  • Example security archtecture: CS/Math.
• Lecture 34
  • VPN
• Lecture 35
  • Refer to Authentication Primer for the next few lectures
  • Password authentication
• Lecture 36
  • Challenge/Response authentication
• Lecture 37
  • Zero-knowlege protocol for authentication
• Lecture 38
  • One time passwords.
  • Needham-Schroeder
  • Indirect authentication: Kerberos
• Lecture 39
  • S.B. presents PHP
• Lecture 40
  • N.T. presents Viruses
  • G.B. presents SSL
• Lecture 41
  • D.R. presents stack smashing
• Lecture 42 (extra session)
  • Y.X. presents IPv6
  • U.G. presents DSS

Homework

• Read Beej's Guide to Network Programming
• Read Java socket example
• Read Lecture 7 from a previous java course.
• Review I/O Programming from a previous java course.
• Read handouts given in class (2) concerning socket programming in Java.
• Homework: Write a network tick-tack-toe program. Due 31 January 2003.
• Read Cisco's Ethernet Paper.
• Homework: Write a program to simulate the Spanning Tree Protocol. Due 24 February 2003.
• Homework: Dissect the network traces captured. Due: Friday, March 23.
  • Header Formats: Ethernet, IP, UDP and TCP
  • RFC 792: ICMP formats.
  • RFC 826: ARP formats.
• Homework: Write a TFTP client/server. Have them use UDP at a user-selected listening port. It only needs to read/write netascii mode.
• Term Projects:
  • Smashing the stack
  • Viruses/Worms
    • Morris Worm
    • Melissa
  • IPv6
  • CSS
  • RPC
  • SMB
  • RMI