DNS Server is Down

If DNS Down so we can Change the Hostname to IP address.

Dns full fourm is Domain Name Service

DNS Protocol - 53

It resolved Host name to IP address

1. Verify that the server computer has a valid functioning network connection. First, check that related Server hardware (cables and network adapters) are working properly at the client using basic network and hardware troubleshooting steps.

If the server hardware appears to be prepared and functioning properly, check that it has network connectivity by pinging other computers or routers (such as its default gateway) that are used and available on the same network as the affected DNS servers.

2. If the DNS client can ping the DNS server computer, verify that the DNS server is started and able to listen to and respond to client requests. Try using the nslookup command to test whether the server can respond to DNS clients.

Even it is ok do the following

Open the DNS console.


From the View menu, click Advanced.


In the console tree, click Reverse Lookup Zones.

Where?


DNS/applicable DNS server/Reverse Lookup Zones


In the details pane, verify that the following reverse lookup zones are present:


0.in-addr.arpa


127.in-addr.arpa


255.in-addr.arpa

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DNS Means Domain Name Service
DNS Server down means server is not available at that pont of time, there will be a lot of causes for that. DNS Server converts human fiendly loguage in to ip addresses when user browses. Otherwice user has to use ip address of perticuler server for browsing.