WClasses

CS 456 - Computer Networks

An introduction to network architectures and protocols, placing emphasis on protocols used in the Internet. Specific topics include application layer protocols, network programming, transport protocols, routing, multicast, data link layer issues, multimedia networking, network security, and network management.

Prerequisites

CS350 or SE350; Computer Science students only.

Corequisites

None

Antirequisites

CS436, ECE358, ECE416

Offerings

Spring 2026 [1265]

Section	Class	Enrolled
LEC 001	3694	0 / 70
LEC 002	3809	0 / 70
TST 101	4004	0 / 140

Winter 2026 [1261]

Section	Class	Enrolled	Time	Days
LEC 001	5802	68 / 70	14:30 - 15:50	M,W
LEC 002	6100	58 / 70	10:00 - 11:20	M,W
TST 101	6340	126 / 140	16:00 - 18:00	F

Fall 2025 [1259]

Section	Class	Enrolled	Time	Days
LEC 001	6338	60 / 70	14:30 - 15:50	M,W
LEC 002	6530	65 / 70	10:00 - 11:20	M,W
TST 101	7163	125 / 140	19:00 - 20:50	Th

Spring 2025 [1255]

Section	Class	Enrolled	Time	Days
LEC 001	3775	63 / 63	14:30 - 15:50	T,Th
LEC 002	3899	63 / 63	16:00 - 17:20	T,Th
TST 101	4112	126 / 140

Winter 2025 [1251]

Section	Class	Enrolled	Time	Days
LEC 001	5883	63 / 75	10:00 - 11:20	M,W
LEC 002	6192	72 / 75	11:30 - 12:50	M,W
LEC 003	8794	70 / 75	14:30 - 15:50	M,W
TST 101	6479	205 / 225

Fall 2024 [1249]

Section	Class	Enrolled	Time	Days
LEC 001	6304	67 / 70	16:00 - 17:20	M,W
LEC 002	6511	69 / 70	11:30 - 12:50	M,W
TST 101	9036	136 / 140	19:00 - 20:50	Th

Spring 2024 [1245]

Section	Class	Enrolled	Time	Days
LEC 001	3813	66 / 70	08:30 - 09:50	T,Th
LEC 002	3943	70 / 70	10:00 - 11:20	T,Th
TST 101	4194	136 / 140

Winter 2024 [1241]

Section	Class	Enrolled	Time	Days
LEC 001	5906	69 / 70	11:30 - 12:50	M,W
LEC 002	6240	69 / 70	14:30 - 15:50	M,W
LEC 003	8795	68 / 70	10:00 - 11:20	M,W
TST 101	6555	206 / 210	18:30 - 20:00	F

Fall 2023 [1239]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	6188	67 / 70	10:00 - 11:20	T,Th
LEC 002	6402	71 / 70	13:00 - 14:20	T,Th

Spring 2023 [1235]

Section	Class	Enrolled	Time	Days
LEC 001	3935	76 / 85	10:00 - 11:20	T,Th
LEC 002	4074	80 / 85	11:30 - 12:50	T,Th
TST 101	5267	156 / 170	16:30 - 18:00	F

Winter 2023 [1231]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	6034	69 / 70	11:30 - 12:50	M,W	MC 4045	Noura Limam
LEC 002	6410	50 / 70	14:30 - 15:50	M,W	MC 2038	Noura Limam
TST 101	6819	119 / 140	19:00 - 20:50	Th

Fall 2022 [1229]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	7293	63 / 70	11:30 - 12:50	T,Th	MC 2038	Samer Al Kiswany
LEC 002	7512	58 / 70	13:00 - 14:20	T,Th	MC 2038	Samer Al Kiswany
LEC 003	11332	3 / 1
TST 101	7737	121 / 140	16:30 - 18:00	F

Spring 2022 [1225]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	3716	72 / 80	13:00 - 14:20	T,Th	PHY 145	Mohammad Salahuddin
LEC 002	3873	72 / 80	11:30 - 12:50	T,Th	PHY 145	Mohammad Salahuddin

Winter 2022 [1221]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	5898	55 / 90	11:30 - 12:50	M,W	MC 4020	Noura Limam
LEC 002	6322	52 / 90	14:30 - 15:50	M,W	MC 4045	Noura Limam
TST 101	9483	107 / 180	16:30 - 18:00	F		Noura Limam

Fall 2021 [1219]

Section	Class	Enrolled	Time	Days	Location	Instructor
DIS 101	6995	25 / 40	11:30 - 12:50	T	MC 2035	Noura Limam
LEC 001	6286	25 / 40				Noura Limam
LEC 002	6594	85 / 120				Noura Limam

Spring 2021 [1215]

Section	Class	Enrolled	Instructor
LEC 041	3459	76 / 80	Noura Limam
LEC 042	3563	70 / 80	Noura Limam
LEC 043	5384	60 / 80	Zille Huma Kamal
TST 141	3564	206 / 240

Winter 2021 [1211]

Section	Class	Enrolled	Instructor
LEC 041	5949	75 / 80	Noura Limam
LEC 042	6373	70 / 80	Noura Limam
TST 141	6431	145 / 160

Fall 2020 [1209]

Section	Class	Enrolled	Instructor
LEC 041	6182	78 / 90	Bernard Wong
LEC 042	6490	69 / 90	Bernard Wong
TST 141	6491	147 / 180

Spring 2020 [1205]

Section	Class	Enrolled	Time	Instructor
LEC 001	3746	83 / 85		Zille Huma Kamal
LEC 002	3903	84 / 85		Zille Huma Kamal
TST 101	3904	167 / 170	18:26 - 18:26

Winter 2020 [1201]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	5796	86 / 88	11:30 - 12:50	M,W	DWE 2527	Zille Huma Kamal
LEC 002	6226	85 / 88	14:30 - 15:50	M,W	MC 1056	Zille Huma Kamal
LEC 003	9456	0 / 1
TST 101	6290	171 / 176	16:30 - 18:00	F

Fall 2019 [1199]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	6002	98 / 100	10:00 - 11:20	M,W	PHY 145	Lesley Ann Istead
LEC 002	6323	93 / 96	16:00 - 17:20	M,W	MC 2017	Lesley Ann Istead
LEC 003	9757	7 / 1
TST 101	6324	191 / 196

Spring 2019 [1195]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	3757	86 / 90	13:00 - 14:20	T,Th	RCH 211	Mohammad Salahuddin
LEC 002	3917	89 / 90	16:00 - 17:20	T,Th	RCH 211	Mohammad Salahuddin
LEC 003	5614	1 / 1
TST 101	3918	175 / 180

Winter 2019 [1191]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	5671	78 / 80	14:30 - 15:50	M,W	E2 1736	Noura Limam
LEC 002	6119	79 / 80	11:30 - 12:50	M,W	MC 1056	Noura Limam
LEC 003	9426	3 / 3
TST 101	6192	157 / 160	16:30 - 18:00	F

Fall 2018 [1189]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	5850	83 / 85	13:00 - 14:20	M,W	E2 1736	Kamal Zille Huma
LEC 002	6182	83 / 85	08:30 - 09:50	M,W	E2 1736	Kamal Zille Huma
LEC 003	9651	4 / 1
TST 101	6183	166 / 170	16:30 - 18:00	F

Spring 2018 [1185]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	3647	86 / 90	16:00 - 17:20	T,Th	RCH 110	Mohammad Ali Salahuddin
LEC 002	3814	87 / 90	13:00 - 14:20	T,Th	MC 1085	Mohammad Ali Salahuddin
TST 101	3815	173 / 180	16:30 - 18:00	F

Winter 2018 [1181]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	5727	53 / 60	10:00 - 11:20	T,Th	RCH 308	Noura Limam
LEC 002	6194	56 / 60	13:00 - 14:20	T,Th	STC 0050	Noura Limam
LEC 003	9572	2 / 1
TST 101	6284	109 / 120	16:30 - 18:00	F

Fall 2017 [1179]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	5945	77 / 80	16:00 - 17:20	M,W	MC 2038	Sergey Gorbunov
LEC 002	6308	75 / 80	14:30 - 15:50	M,W	MC 2038	Sergey Gorbunov
LEC 003	9396	5 / 1
TST 101	6309	152 / 160	16:30 - 18:00	F

Spring 2017 [1175]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	3648	80 / 85	13:00 - 14:20	T,Th	DWE 2527	Martin Karsten
LEC 002	3825	75 / 85	10:00 - 11:20	T,Th	DWE 2527	Martin Karsten
TST 101	3826	155 / 170	19:00 - 20:50	T

Winter 2017 [1171]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	5458	60 / 60	14:30 - 15:50	T,Th	MC 4041	Noura Limam
LEC 002	5943	60 / 60	11:30 - 12:50	T,Th	MC 4041	Noura Limam
TST 101	6065	120 / 120	16:30 - 18:00	F

Fall 2016 [1169]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	5924	67 / 66	13:00 - 14:20	T,Th	PHY 150	Sara Ayoubi
LEC 002	6306	65 / 67	16:00 - 17:20	T,Th	PAS 1229	Sara Ayoubi
LEC 003	9300	1 / 1
TST 101	6307	132 / 133	16:30 - 18:00	F

Spring 2016 [1165]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	3654	79 / 80	13:00 - 14:20	M,W	MC 2017	Ghada Badawy
LEC 002	3851	78 / 80	11:30 - 12:50	M,W	MC 1085	Ghada Badawy
TST 101	3852	157 / 160	19:00 - 20:50	T		Ghada Badawy

Winter 2016 [1161]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	5998	59 / 60	13:00 - 14:20	W,F	MC 2035	Noura Limam
LEC 002	6536	50 / 60	08:30 - 09:50	W,F	MC 4040	Noura Limam
LEC 003	8813	1 / 1
TST 101	8282	109 / 120	16:30 - 18:00	F

Fall 2015 [1159]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	6191	55 / 60	11:30 - 12:50	M,W	PHY 235	Raouf Boutaba
LEC 002	6607	51 / 60	10:00 - 11:20	M,W	EV2 2002	Raouf Boutaba
LEC 003	8872	4 / 1
TST 101	6608	106 / 120	16:30 - 18:00	F

Spring 2015 [1155]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	3725	60 / 60	10:00 - 11:20	T,Th	PHY 313	Martin Karsten
LEC 002	3932	58 / 60	16:00 - 17:20	T,Th	RCH 308	Martin Karsten
TST 101	3933	118 / 120	19:00 - 20:50	T

Winter 2015 [1151]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	5786	58 / 60	11:30 - 12:50	T,Th	MC 4041	Raouf Boutaba
LEC 002	7737	53 / 60	08:30 - 09:50	T,Th	MC 4041	Raouf Boutaba

Fall 2014 [1149]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	5858	54 / 60	08:30 - 09:50	T,Th	RCH 207	Noura Limam
LEC 002	6331	60 / 60	10:00 - 11:20	T,Th	RCH 207	Noura Limam
LEC 003	8721	1 / 1
TST 101	6332	114 / 120	16:30 - 18:00	F

Spring 2014 [1145]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	3635	58 / 60	11:30 - 12:50	M,W	MC 2038	Mohamed Faten Zhani
LEC 002	3865	59 / 60	16:00 - 17:20	M,W	RCH 306	Mohamed Faten Zhani
TST 101	3866	117 / 120	18:30 - 20:00	F		Mohamed Faten Zhani

Winter 2014 [1141]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	5598	69 / 75	16:30 - 17:50	M,W	MC 2035	Raouf Boutaba
LEC 002	8632	2 / 1

Fall 2013 [1139]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	5514	61 / 65	11:30 - 12:50	T,Th	RCH 211	Raouf Boutaba
LEC 002	7409	54 / 65	14:30 - 15:50	T,Th	OPT 347	Raouf Boutaba
LEC 003	8390	1 / 1
TST 101	7410	115 / 130	16:30 - 18:00	F

Spring 2013 [1135]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	3465	54 / 60	11:30 - 12:50	T,Th	MC 4041	Martin Karsten
LEC 002	5330	49 / 60	13:00 - 14:20	T,Th	MC 4041	Martin Karsten
TST 101	5331	103 / 120	18:30 - 20:00	F

Winter 2013 [1131]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	5355	76 / 80	09:30 - 10:20	M,W,F	MC 1056	Noura Limam
LEC 002	8290	1 / 1
LEC 003	8362	1 / 1

Fall 2012 [1129]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	5453	82 / 80	08:30 - 09:50	T,Th	MC 2034	Raouf Boutaba

Spring 2012 [1125]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	3515	78 / 78	11:30 - 12:50	T,Th	MC 2038	Noura Limam

Winter 2012 [1121]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	5138	68 / 70	08:30 - 09:20	M,W,F	MC 2038	Noura Limam
LEC 002	8187	1 / 1

Fall 2011 [1119]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	5284	63 / 70	08:30 - 09:50	T,Th	MC 2035	Earl Albert Oliver

Spring 2011 [1115]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	3409	51 / 50	16:00 - 17:20	T,Th	MC 4063	Raouf Boutaba
LEC 002	4372	50 / 50	17:30 - 18:50	T,Th	MC 4063	Raouf Boutaba

Winter 2011 [1111]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	5095	40 / 60	11:30 - 12:50	T,Th	MC 4060	Raouf Boutaba

Fall 2010 [1109]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	5331	38 / 40	16:00 - 17:20	T,Th	MC 4042	Raouf Boutaba
LEC 002	7154	43 / 40	11:30 - 12:50	T,Th	RCH 204	Raouf Boutaba
LEC 003	8045	2 / 1

Spring 2010 [1105]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	4936	50 / 60	11:30 - 12:20	M,W,F	MC 4060	Eren Gurses

Winter 2010 [1101]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	5063	54 / 60	11:30 - 12:50	T,Th	MC 4059	Urs Hengartner

Fall 2009 [1099]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	5072	65 / 65	16:00 - 17:20	T,Th	MC 2017	Alejandro Lopez-Ortiz

Spring 2009 [1095]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	3295	47 / 50	10:00 - 11:20	T,Th	MC 4040	Srinivasan Keshav

Winter 2009 [1091]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	4296	29 / 50	11:30 - 12:50	T,Th	MC 4042	Martin Karsten
LEC 002	4297	19 / 50	14:30 - 15:50	T,Th	MC 2065	Martin Karsten

Fall 2008 [1089]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	3967	68 / 80	16:00 - 17:20	T,Th	MC 2038	Raouf Boutaba

Spring 2008 [1085]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	2746	60 / 60	11:30 - 12:50	T,Th	MC 4060	Reid Charles Kerr
LEC 002	4083	0 / 50

Winter 2008 [1081]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	3461	29 / 50	11:30 - 12:50	T,Th	DWE 3518	Timothy Brecht
LEC 002	3462	24 / 50	14:30 - 15:50	T,Th	MC 4060	Timothy Brecht

Fall 2007 [1079]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	3693	82 / 90	11:30 - 12:50	T,Th	MC 2034	Raouf Boutaba

Spring 2007 [1075]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	2366	49 / 50	11:30 - 12:50	T,Th	MC 4040	Martin Karsten
LEC 002	2389	29 / 50	14:30 - 15:50	T,Th	MC 4042	Martin Karsten

Winter 2007 [1071]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	3403	38 / 50	08:30 - 09:50	M,W	MC 4042	Srinivasan Keshav
LEC 002	3404	51 / 50	14:30 - 15:50	M,W	MC 4042	Srinivasan Keshav

Fall 2006 [1069]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	3602	27 / 50	08:30 - 09:50	T,Th	MC 4063	Ian Goldberg
LEC 002	5019	35 / 50	14:30 - 15:50	T,Th	MC 2038	Ian Goldberg

Spring 2006 [1065]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	2402	44 / 50	10:00 - 11:20	T,Th	RCH 306	Martin Karsten
LEC 002	2432	47 / 50	13:00 - 14:20	T,Th	MC 4042	Martin Karsten

Winter 2006 [1061]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	3294	47 / 50	08:30 - 09:50	M,W,M,C		Urs Hengartner
LEC 002	3295	48 / 50	14:30 - 15:50	M,W,M,C		Urs Hengartner

Fall 2005 [1059]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	3639	56 / 50	16:00 - 17:20	T,Th,M,C		Srinivasan Keshav

Spring 2005 [1055]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	2444	48 / 50	10:00 - 11:20	T,Th,R,C,H		Martin Karsten
LEC 002	2946	47 / 50	13:00 - 14:20	T,Th,M,C		Martin Karsten

Winter 2005 [1051]

Section	Class	Enrolled	Time	Days	Instructor
LEC 001	3248	57 / 50	08:30 - 09:50	M,W,M,C	Raouf Boutaba
LEC 002	3249	54 / 50	14:30 - 15:50	M,W,M,C	Raouf Boutaba
LEC 003	5192	53 / 50	16:30 - 17:50	M,W,M,C	Raouf Boutaba

Fall 2004 [1049]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	3657	58 / 50	16:00 - 17:20	T,Th,M,C		Raouf Boutaba

Spring 2004 [1045]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	2895	57 / 50	19:00 - 20:20	M,W,M,C		Bart Courtney Domzy

Winter 2004 [1041]

Section	Class	Enrolled	Time	Days	Instructor
LEC 001	3104	50 / 50	08:30 - 09:50	M,W,M,C	Srinivasan Keshav
LEC 002	3105	52 / 50	14:30 - 15:50	M,W,M,C	Srinivasan Keshav
LEC 003	4939	60 / 60	17:30 - 18:50	M,W,M,C	Bart Courtney Domzy

Fall 2003 [1039]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	4738	47 / 50	16:00 - 17:20	T,Th,M,C		Alejandro Lopez-Ortiz

Winter 2003 [1031]

Section	Class	Enrolled	Time	Days	Instructor
LEC 001	3713	60 / 60	08:30 - 09:50	M,W,M,C	Raouf Boutaba
LEC 002	3714	60 / 60	14:30 - 15:50	M,W,M,C	Raouf Boutaba
LEC 003	3943	57 / 60	16:00 - 17:20	M,W,M,C	Alejandro Lopez-Ortiz

Fall 2002 [1029]

Section	Class	Enrolled	Time	Days	Location	Instructor
LAB 101	5423	2 / 1
LEC 001	5422	2 / 1

Spring 2002 [1025]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	3131	1 / 0

Winter 2002 [1021]

Section	Class	Enrolled	Time	Days	Instructor
LEC 001	2387	48 / 60	08:30 - 09:50	M,W,M,C	Raouf Boutaba
LEC 002	2388	52 / 60	14:30 - 15:50	M,W,M,C	Raouf Boutaba
LEC 003	4542	40 / 60	16:00 - 17:20	M,W,M,C	Raouf Boutaba

Fall 2001 [1019]

Section	Class	Enrolled	Time	Days	Location	Instructor
LEC 001	5100	1 / 1

UW Flow Ratings

Liked: 68.42%

68.42%

Easy: 73.33%

73.33%

Useful: 81.84 %

81.84%

CS 456 leads to

CS 459 - Privacy, Cryptography, Network and Data Security