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Mohamed G. Gouda					CS 356
Spring 2019						Exercise 5
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Six messages (M1 to M6) need to be exchanged in order to resolve the
host name of the web server (www.products.ab.com) into an IP address.
Describe message M4.

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Solution:
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Message M4 can be described as follows:

	(from com server to local DNS server)
	(IP address of www.products.ab.com?)
	(IP address of ab.com server)

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