CS2910 Week 1, Class 1 Today Introductions Class/Lab Layout Safety Review - Note about Lab Safety Review Announce Prof. Michael Vieau’s S-341 6p Thurs.

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Presentation transcript:

CS2910 Week 1, Class 1 Today Introductions Class/Lab Layout Safety Review - Note about Lab Safety Review Announce Prof. Michael Vieau’s S-341 6p Thurs Wk 2 Assignment for tomorrow Networking a Game Network Layers and Packet Headers Demonstration of Wireshark Survey Lab 1 – Examining a Packet’s Network Layers Muddiest Point SE-2811 Slide design: Dr. Mark L. Hornick Content: Dr. Hornick Errors: Dr. Yoder 1

Introductions Find someone you don’t know and learn Their name One interesting thing they did this summer Be prepared to tell this to the rest of the class Just 3 minutes… make sure you both get a turn! SE-2811 Dr.Yoder 2

Networking a game See handout SE-2811 Dr.Yoder 3

Network Layers Internet protocol stack SE-2811 Dr.Yoder 4 Physical Link Network Transport Application

Nested Packets SE-2811 Dr.Yoder 5 Ethernet Header Ethernet Payload

Nested Packets SE-2811 Dr.Yoder 6 Ethernet Header IP Header IP Payload

Nested Packets SE-2811 Dr.Yoder 7 Ethernet Header IP Header TCP Header TCP Payload

Nested Packets SE-2811 Dr.Yoder 8 Ethernet Header IP Header TCP Header HTTP Header HTTP Payload

Nested Packets SE-2811 Dr.Yoder 9 Ethernet Header Ethernet Payload Ethernet Header IP Header IP Payload Ethernet Header IP Header TCP Header TCP Payload Ethernet Header IP Header TCP Header HTTP Header HTTP Payload

Representing bits and bytes (Corrected) ASCII characters: ‘A’ ‘\r’ CR (Carriage return) ‘\n’ LF (Line feed, New line) SE-2811 Dr.Yoder 10

Exercise 1: How many values can you represent with 1 bit? 2? 3? 4? 5? 6? 7? 8? 9? 10? Exercise 2: How many bits can you represent with a single decimal digit (0-9)? Exercise 3: How to represent ASCII ‘A’, CR, and LF in hexadecimal? SE-2811 Dr.Yoder 11

BinaryHexadecimal SE-2811 Dr.Yoder 12 BinaryHexadecimal A 1011B 1100C 1101D 1110E 1111F

BinaryOctal SE-2811 Dr.Yoder 13 BinaryOctal unused 8 9

SE-2811 Dr. Josiah Yoder 14

Acknowledgement This course is based on the text Computer Networking: A Top Down Approach 6 th edition Jim Kurose, Keith Ross Addison-Wesley March 2012 SE-2811 Dr. Josiah Yoder 15