CS 168 Spring 2026

Instructor: Rishabh Iyer / Lecture: TuTh, 5:00–6:30 PM, Dwinelle 155 [Zoom, Playlist]

Announcements

Midterm Logistics

Feb 24

The midterm is on Friday, March 20, 7–9pm.

Midterm logistics are available on the exam logistics page.

Please fill out this form if you need an alternate exam time, an online exam, or you have DSP accommodations. The form is due Friday, February 27, 11:59pm PT, but will remain open for late requests until Thursday, March 19. We cannot guarantee that late submissions will be accomodated, but we will do our best. For last-minute emergencies, please email [email protected].

Past announcements

Course Calendar

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Wk.	Date	Lecture	Readings	Discussion	Project
1	Tue Jan 20	1. Intro 1: Architecture and Protocols Slides / Recording	Intro	No discussion	Project 1A (Traceroute) (due Fri Jan 30)
	Thu Jan 22	2. Intro 2: Architectural Overview: Bottom-up Slides / Recording	Links , Multiplexing
2	Tue Jan 27	3. Intro 3: Architectural Overview: Top-Down Slides / Recording	Layers , Headers	1. Intro I Worksheet / Solutions / Video / Slides
	Thu Jan 29	4. Intro 4: Architectural Principles Slides / Recording	Architecture , Design
3	Tue Feb 03	5. Routing 1: Principles Slides / Recording	Intro , Model , States	2. Intro II Worksheet / Solutions / Video / Slides	Project 1B (Traceroute) (due Fri Feb 13)
	Thu Feb 05	6. Routing 2: Distance-Vector Slides / Recording	Distance-Vector
4	Tue Feb 10	7. Routing 3: Link-State, Addressing Slides / Video	Link-State , Addressing	3. Routing I Worksheet / Solutions / Video / Slides
	Thu Feb 12	8. Routing 4: Routers Slides / Video	Routers
5	Tue Feb 17	9. Routing 5: BGP I Slides / Recording	Model , Design	4. Routing II Worksheet / Solutions / Video / Slides	Project 2 (Routing) (due Fri Feb 27)
	Thu Feb 19	10. Routing 6: BGP II Slides / Recording	Implementation , IP Header
6	Tue Feb 24	11. Transport 1: TCP I Slides / Recording	Principles	5. BGP Worksheet / Solutions / Video / Slides
	Thu Feb 26	12. Transport 2: TCP II Slides / Recording	Design , Implementation
7	Tue Mar 03	13. Transport 3: Congestion Control I Slides	Principles , Design , Implementation	6. TCP Worksheet / Solutions / Video / Slides
	Thu Mar 05	14. Transport 4: Congestion Control II Slides	Throughput , Issues , Router-Assisted
8	Tue Mar 10	15. Applications 1: DNS Slides	DNS	7. Congestion Control Worksheet / Solutions / Video / Slides
	Thu Mar 12	16. Applications 2: HTTP and CDNs Slides	HTTP
9	Tue Mar 17	17. End-to-End 1: Ethernet, STP Slides	Ethernet , STP	8. DNS, HTTP Worksheet / Solutions / Video / Slides Midterm Minilectures
	Thu Mar 19	18. End-to-End 2: ARP, DHCP, NAT, TLS Slides	NAT , TLS , ARP , DHCP , End-to-End
	Fri Mar 20	Midterm (Fri Mar 20, 7–9pm)
10	Tue Mar 24	No Lecture (Spring Break)		No Discussion (Spring Break)
	Thu Mar 26
11	Tue Mar 31	19. Datacenters 1: Topology Slides	Topology , Congestion	9. ARP, DHCP, NAT Worksheet / Solutions / Video / Slides	Project 3A (Transport) (due Fri Apr 03)
	Thu Apr 02	20. Datacenters 2: Routing Slides	Routing , Addressing , Virtualization
12	Tue Apr 07	21. Datacenters 3: SDN Slides	SDN	10. Datacenters Worksheet / Solutions / Video / Slides Ethernet Slides	Project 3B (Transport) (due Fri Apr 10)
	Thu Apr 09	22. Datacenters 4: Host Networking Slides	Host Networking
13	Tue Apr 14	23. Beyond Client-Server 1: Multicast Slides	Multicast	11. Host Networking and SDN Worksheet / Solutions / Video / Slides
	Thu Apr 16	24. Beyond Client-Server 2: Collectives Slides	Operations , Implementation
14	Tue Apr 21	25. Wireless 1: Wireless Links Slides	Wireless	12. Multicast and Collectives Worksheet / Solutions / Video / Slides
	Thu Apr 23	26. Wireless 2: Cellular Slides	Cellular
15	Tue Apr 28	Buffer		13. Wireless and Cellular Worksheet / Solutions / Video / Slides Final Minilectures
	Thu Apr 30	Buffer
16	Tue May 05	No Lecture (RRR Week)
	Thu May 07
17	Fri May 15	Final Exam (Fri May 15, 11:30am–2:30pm)