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General Question in DNS with squid

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hi ,

this is a general networking question about DNS ,

my question is as shown :

now assume im a pc have ip , gateway , DNS configured on my lan card ,

now assume i requested Google.com ,
as i learned in networking  ==>  Google.com is send to my dns server  so
that DNS server  resolve it  to ip 
after it is resolved i will go to dst ip of google with dst port 80 , assume
it is "80" http :) 

assume there was transparent squid between google.com and internet , it mean
i will go to that squid cache and be served .



but my question again , why squid  can resolve DNS queries ??????

as i understand it is not a squid  work  to resolve names to ips ,   it is
work of DNS servers ,

so why in squid we  have dns configs ??

is it mandatory to put DNS in some occasions ??? wish to know them if  there
were 

note i use WCCP with Tptoxy  .

regards








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Mr.Ahmad
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