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Usually you have your primary and your secondary. That's just incase you cant get through to one, you have the second as a backup.

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Q: Why should we have more than one DNS?
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What is Client-side DNS?

Client-side DNS is a system on most modern operating systems that allows a user or administrator to specify that a certain DNS entry will correspond to a particular IP address. In most cases (that is to say, "by default") a client-side entry will be used if it exists. So, if you entered into a hosts file a domain name, and an IP address, the user using any network software would be directed to the IP address you specified, rather than the one specified by external DNS records. (In other words, you can make a domain point wherever you wanted for that machine.)This is useful when you want to use things like virtual hosts in a local web server. You can enter any name you'd like (normally with an unused top level domain extension) and have it point back at that machine (127.0.0.1 is the loopback IP.) In a network environment, you might choose to do this so you can use friendly names, rather than remembering the specific IP address, but in most of those cases a local DNS server is used, rather than client-side DNS, now.


What is the difference between recursive and non recursive program?

A recursive system is one in which the output is dependent on one or more of its past outputs while a non recursive system is one in which the output is independent of any past outputs.e.g feedforward system having no feedback is a non recursive system.


Which type of circuit the parallel circuit are use?

they are used for more power than a series circuit so you should use this one.


Why program consists more than one object file in c?

why does a program consists of more than one object file in c++


What is the correct JavaScript syntax to insert a comment that has more than one line?

The proper syntax to insert a multi-line comment into JavaScript is to surround the comment with /* and */ function useless() { /* This function doesn't do anything We should come back to it. Soon. */ }

Related questions

What can one do to resolve a dns?

One looking to resolve their DNS issues should enable reverse look-ups on their DNS server. Next, one should check for duplicate records on their DNS server. Finally, one should compare the records on their DNS server and make the necessary changes.


How can I speed up my Internet browsing by changing DNS settings?

One can increase the speed of internet browsing by changing their DNS server address. A list of DNS servers can be found on the Comcast website. Changing the DNS address to a more reliable one should increase the browsing speed of the computer.


Where can one get information on a Comcast DNS server?

One can get more information on a Comcast DNS server from the following sources: What's My DNS, Comcast, DNS Knowledge, ZDNet, DSL Reports, Port Forward, Open DNS, Mac Medics, to name a few.


A DNS server that's primary for one DNS database zone also can be secondary for one or more other dns database zones?

Often, DNS servers that are authoritative, or primary, for specific zones also function as slave, or secondary, DNS servers for other nearby zones. This permits hosts in one zone to gain access to DNS data from those other zones.


What is the difference between an open DNS and a closed DNS?

There is one major difference between an open DNS and a closed DNS. Open DNSs allow multiple users to connect easily while closed ones do not allow more users.


How can dns services help my company?

DNS services can help you business by allowing people to get to your website by using a different name of your choosing. The more DNS names you have, the easier it is for someone to remember one of them.


Where can one find information DNS load balancing?

DNS load balancing is defined to be spreading the load of people on a certain website accross multiple survers if one does not suffice. One can find more information about DNS load balancing on sites like Zytrax and Splux.


What is a unique name that identifies one or more IP addresses?

DNS provides mapping of ip addresses to name. DNS is short from of Domain name system . DNS provides name to Ip address and that name is called as URL.


How can one change dns settings?

Check on the discussions I posted a link to an article that details how to change the DNS in XP, vista and 7


Can some one give me the fastest dns server numbers?

preferred dns: 68.87.64.146 alternate dns: 208.67.222.222 or 208.67.220.220


How can one determine a primary DNS?

A DNS can be determined by opening the command prompt on the start menu, type "cmd" and press enter in the black window, type in "ipconfig/all", scroll down the information displayed until DNS server is visible, the first address is the primary DNS. DNS stands for Domain Name Server Commands should be typed without the quotation marks.


IF you go to more than one prom should you get more than one dress?

only if you are a girl