1. What is the purpose of tier-1 and tier-2 ISPs? What is the purpose of access ISPs?2. What is… 1 answer below »

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1. What is the purpose of tier-1 and tier-2 ISPs? What is the purpose of access ISPs?2. What is DNS?3. (a) What bit pattern is represented by 3.6.9 in dotted decimal notation? (b) Express the bit pattern 0001010100011100 using dotted decimal notation.5. Name three types of servers found on the Internet and tell what each does.

 
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