CSE473S: Introduction to Computer Networks (Spring 2023)

Course Description:
This course provides a broad overview of computer networking. Topics include Internet: core and edge, history, application layer protocols, Hyper Text Transfer Protocol (HTTP), File Transfer Protocol (FTP), Simple Mail Transfer Protocol (SMTP), Domain Name System (DNS), peer-to-peer (P2P), transport layer design issues, transport layer protocols, Transmission Control Protocol (TCP), User Datagram Protocol (UDP), TCP congestion control, network layer, Internet Protocol version 4 (IPv4), Internet Control Message Protocol (ICMP), Internet Protocol version 6 (IPv6), routing algorithms, routing protocols, Open Shortest Path First (OSPF), Routing Information Protocol (RIP), Border Gateway Protocol (BGP), datalink layer and local area networks carrier sense multiple access with collision detection (CSMA/CD), Ethernet, virtual local area networks (VLANs), Point-to-Point Protocol (PPP), Multi-Protocol Label Switching (MPLS), wireless and mobile networks, code division multiple access (CDMA), IEEE 802.11 (WiFi), multimedia networking, security in computer networks, and cryptography.

Prerequisite: CSE 131 (Computer Science I) or permission of the instructor (Note: CSE 241 as indicated in the course catalog is not required.)

Textbook: J. F. Kurose and K. W. Ross, "Computer Networks: A Top-Down Approach," 8th Edition, Pearson, 2021, ISBN: 9780136681557

Instructor: Prof. Raj Jain, jain@wustl.edu, Office: McKelvey 2038, Office Hours: By appointment

Location: The class meets Mondays and Wednesdays from 1:00 PM to 2:20 PM.

Teaching Assistants Office Hours: TBD

Instruction Type: Online Hybrid Course (OLH).
The class has been flipped and so you need to watch the video before the class. The class time is used to answer questions logged on the question form or any other questions on the topic. All Q&A sessions will be held via zoom. See Canvas for the Zoom link. All exams will be in person. See modules below in the tentative schedule for links to videos.

All question about the homeworks and exams grading should be directed to TAs.

Audio/Video recordings of lectures from the previous offering of this course are available online: Spring 2022, Spring 2021, Spring 2020, Spring 2019, Fall 2016, Fall 2011, Fall 2010, Fall 2009, Fall 2005.

Tentative Schedule (Subject to Change)

ClassDayDateQ&A TopicChapter
1Wednesday1/18/2023Course Overview
2Monday1/23/2023Computer Networks and the Internet (Part 1)1
3Wednesday1/25/2023Computer Networks and the Internet (Part 2)1
4Monday1/30/2023Application Layer (Part 1): HTTP2
5Wednesday2/01/2023Application Layer (Part 2): SMTP, DNS, P2P2
6Monday2/06/2023Transport Layer (Part 1): Design Issues3
7Wednesday2/08/2023Transport Layer (Part 2): UDP, Flow Control3
8Monday2/13/2023Transport Layer (Part 3): TCP, TCP Congestion Control3
The Network Layer: Data Plane (Part 1: Network Layer Basics)4
9Wednesday2/15/2023Network Layer Data Plane (Part 2: IP Datagram, NAT, UPNP, DHCP)4
10Monday2/20/2023Exam 1 review
11Wednesday2/22/2023Exam 14
12Monday2/27/2023Network Layer Data Plane (Part 3: SDN)4
The Network Layer: Control Plane (Part 1: Dijkstra's, Bellman-Ford Algorithms)5
13Wednesday3/01/2023The Network Layer: Control Plane (Part 2: OSPF and BGP, SDN Controller )5
14Monday3/06/2023The Link Layer and LANs (Part 1): Functions6
15Wednesday3/08/2023The Link Layer and LANs (Part 2): CRC6
Monday3/13/2023Spring Break - No class
Wednesday3/15/2023Spring Break - No class
16Monday3/20/2023The Link Layer and LANs (Part 3): Multiple Access, Ethernet, VLANs, MPLS, Data Centers6
17Wednesday3/22/2023Wireless and Mobile Networks (Part 1): Wireless Characteristics, LANs and PANs7
18Monday3/27/2023Exam 2 Review
19Wednesday3/29/2023Exam 2
20Monday4/03/2023Wireless and Mobile Networks (Part 2): Mobility Management7
21Wednesday04/5/2023Wireless and Mobile Networks (Part 3)7
22Monday4/10/2023Security in Computer Networks (Part 1): Cryptography8
23Wednesday4/12/2023Security in Computer Networks (Part 2)8
24Monday4/17/2023Security in Computer Networks (Part 3)8
25Wednesday4/19/2023Security in Computer Networks (Part 4)8
26Monday4/24/2023Exam 3 Review
27Wednesday4/26/2023Exam 3

Exams (Best 2 of 3)60%(30% Each)
Class participation05%
Video Reviews10%

Complete List of Audio and Video Recording of Lectures by Raj Jain
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