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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 on theme: "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."— Presentation transcript:

1 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

2 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

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

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

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

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

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

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

9 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

10 Representing bits and bytes (Corrected) ASCII characters: 0100 0001 ‘A’ 0000 1101 ‘\r’ CR (Carriage return) 0000 1010 ‘\n’ LF (Line feed, New line) SE-2811 Dr.Yoder 10

11 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

12 BinaryHexadecimal 00000 00011 00102 00113 01004 01015 01106 01117 SE-2811 Dr.Yoder 12 BinaryHexadecimal 10008 10019 1010A 1011B 1100C 1101D 1110E 1111F

13 BinaryOctal 0000 0011 0102 0113 1004 1015 1106 1117 SE-2811 Dr.Yoder 13 BinaryOctal unused 8 9

14 SE-2811 Dr. Josiah Yoder 14

15 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

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