Wednesday, March 4th

6.3 Internet Architecture and Packet Switching

Where is this website located? ox.ac.uk
When you connect to ox.ac.uk how does your web page request get there?

This map will show you how that connection is made.

Here is how they do it.

6.4 IP Addressing and Domain Names - IP and DNS video - without DNS you will not be able to acces anything on the Internet.

WhatIP.com - use this site to find out what your IP address is or just Google it - What is my IP Address?

How to find your IP Address on a Mac - what is your IP Address?

Complete 6.4 Questions and ONLY Reflection Question #1

TCP/IP Packet Routing Simulation from Monday - in this exercise you will simulate the sending of data from one person to another across a network. Once you have finished the activity answer the following questions and then show them to your instructor for teacher check.

1. Packet Order. Does it matter whether the packets of a message arrive in order? Explain how this set of protocols handles that.
2. Missing Packets. What should happen if a packet goes missing? Who (which layer) would handle this? What action would they have to take? And what additional information would be needed in the packet in order to handle it?
3. Corrupted Packets. Suppose there’s some kind hardware glitch that corrupts one or more bits in a packet? Can this be detected? What action should be taken in this case? What additional information would be needed to handle this issue?
4. Security/Privacy. As the packets are being transmitted through the network, can people other than the sender and receiver read the messages? What methods can we use to protect the message?

Complete 6.2 Questions and Reflections

Complete 6.3 Questions and Reflections

Begin 5.12 Wrap Up Drills - demonstrate your working app and show your code blocks for teacher check.

Homework

Review IP Addressing