i am back again to ask for new questions

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in time i am concerned with my damn hard thesis , some bad questions arose in my brain

1- first

as i know google is in america yeah. so www.google.com is managed from there


also there exist www.google.de and www. google.com.tr

so , if google is managed from america , how can .de and .com.tr be exist?

2-second one is about DNS

for example while i connect to "www.hotmail.com" the mechanism is that i am able to enter
these words not numbers is DNS
but DNS is on TCP also UDP( both connection-oriented and connectionless)

while i want to reach a site , isn't enough the dns server only in the network of the site i connect to? i mean

IS IT A MUST THAT THE DNS SERVER exist in both client and server side?


3- third one is also related to DNS

think you have a web site and your public ip address of web server was 88.111.22.34 and you decided
to change your ISP for some specific reasons

and clients were connecting to your site before ,
but your ip address would change because of moving to another ISP
so , is this about DNS ?

i think even without DNS , they could not connect to 88.111.22.34 anymore(because it changed so what is the thing
DNS made here?

 

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1 - Google - Load Balancing

2 - The question makes no sense

3 - How DNS works

Ordinarily I would tell you to buy a book, but you don't seem to want to listen to that so don't bother - just go to Google and type your queries in.

 

A domain name such as google.com DOESN'T have to be hosted in America - can be hosted in UK or anywhere else. My business has a .co.uk and .com domain name - both are hosted and managed from the UK.

As for Google - the .com will be those that reside in America. The others - .de - will be for those who reside in Germany. I would imagine that the Servers reside in the domain name's country. This most likely aids in preventing traffic from crossing the atlantic etc i.e. someone in Germany can access the .de quicker then the .com as that web server is most likely in America. Also by google hosting in different countries it means that it can apply that country's laws to that particular version of Google - for instance they could filter out the Swastika from image searches within Germany's google.

DNS is a massive subject and I'd suggest you Google "How DNS Works". But the only thing DNS related on the client side is the DNS Resolver Cache (stores previous DNS request for a limited amount of time) and the DNS settings of the client. DNS is part of the TCP/IP suite of protocals and DNS requests are sent using UDP. DNS does not use TCP - TCP is part of the TCP/IP Suite...don't confuse the suite with one protocol or vice versa!

You need to study the Network+ as that course/cert deals with EVERYTHING you've posted on this forum!

 

couldn't buy a book but reading network+ documents on the net man also about dns!

second question again step by step

1- you are a client
2- and you wish connecting to www.hotmail.com
3- to write as www.hotmail.com , there must be a converter named dns
4- but this dns server must exists in my network or in the network of www.hotmail.com ?
5- or both side ?

 

hotmail.com is in a network , isn't it ? so dns server must be there only or both side (there and my network)?

 

Yep the DNS servers for hotmail.com are:

NS2.MSFT.NET
NS4.MSFT.NET
NS1.MSFT.NET
NS5.MSFT.NET
NS3.MSFT.NET

Your ISPs network will have dns server too that'll most likely contain the resolved name of hotmail.com - so a DNS request from you for Hotmail.com will never likely get to the hotmail nameservers as you're ISPs nameserver would have resolved it for others!

So DNS servers are at your side and Hotmails side...hopefully you'll understand that!

 

i think i understood the google part , but how can this be managed? google in many countries

also you may think cisco.com and cisco.com.tr

 

sorry but in order to have a "dns request" , should a dns server be in my network?
or is it enough that i am a client ?

 

cisco.com and cisco.com.tr are all probably hosted on the same set of servers. What happens is that Cisco has a set of websites created in its primary language which is English in this case. Then they have the content of those sites translated into various languages including one for the .com.tr site. Then it's just a matter of uploading that content to the appropriate web server(s). You'll notice in your web browser's address field that the URL for cisco.com.tr is actually:

http://www.cisco.com/web/TR/index.html

The translated sites for cisco.com apparently exist as subsites of the top-level portal site for cisco, which is common. I'm writing yet another Microsoft Office SharePoint Server book and SharePoint has an entire translation/workflow process that allows original content to be translated and published to the web this way. While Cisco is probably not using SharePoint for this purpose, they are likely using a similar process for website translation and publication to the web.

 

tripwire's sentences are complicated , man!

and here the bottom part



this picture shows my dns server i connected , maybe it is in my ISP!

i thought weird things

first

if i want to form a website(web server) , do i have to build a dns server in my network to enter
URL as characters ?


second

in which circumstances should i need a dns server in my network without using ISP's dns server?


third

if i use ISP's dns server , should i have mine in my network?

 

So you're doing a masters thesis and need more people to do your research for you..... Well, I refuse. Do your own research, do your own learning. You seem to be a master manipulator, but you're not going to manipulate me into doing your work for you.

 

sorry i try but i can't understand!

to ffreeloader and others : men , i search all time while im on my computer !

 

Kobem - I don't think you're cut out for this (IT). I'd look for an alternate career! I hear that Property is a booming industry in Turkey.

 

Kobem,

If you can't understand stuff that millions of high school students understand, you have no business in a master's degree program. If anyone passes you, they are doing you no favors. You will not succeed outside of school because you cannot even understand the fundamentals.