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An ISP Help Desk Technician Receives A Call From A Customer Who Reports That No One At Their Business Can Reach Any Websites Or Get Their E-mail. After Testing The Communication Line And Finding Everything Fine, The Technician Instructs The Customer?

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Amalia Syeda-Aguirre Profile
The technician should instruct the customer to use 'nslookup' on one of their computers. The customer will need to go to the command prompt and type in nslookup.exe. This tool will then help the customer ascertain the cause of the problem. Nslookup is an administrative tool that troubleshoots DNS servers.

The first time that a query is made for a remote name, the local DNS server will contact the DNS server and bookmark the information. Once the information needed has been found the information can be input directly to get the systems to work. If there is an error screen that states, 'can't find server name for address 127.0.0.1: Timed out', then the DNS server cannot be reached and the DNS server may need to be restarted, or it could be because of connectivity problems. Once this has happened, any subsequent queries will be answered outside of the local server.

Other likely causes of the problem are either that the cables at the business premises are damaged, or that there are some loose connections somewhere within the cabling system.

DNS stands for Domain Name System and is a name that is given to any computer or network of computers connected to the Internet. DMS allows users to assign names to groups of resources, enabling them to use the Internet and keeping contact information no matter which computer in a network is being used. DNS is also used by mail servers and stores the information that enables the computer to accept E-mails.

DNS is an essential part of the Internet and the functionality thereof, and it is also used by anti-virus and commercial software to store updates so that people who have purchased the software can access the updates more easily, without the need to connect to the servers each time they update.

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