Test for Chapter 1 , 2 and 3 activated

Test 3 is enabled. Test 1 and 2 re-enabled (do not get used to it).
Please read chapter 4 (VTP). Chapters 2,3 and 4 are related. Don't read chapter 4 without reading 2 and 3.

If you have time, lab 4.1 from the cisco.netacad.net. Do not download the pdf. Instead open the *.pkt file offered in the link. That will open your Packet Tracer 5.1 (that should have been installed).

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