Domain name servers

The domain name service is provided by a network of connected, independently operated domain name servers. A domain name server is a database containing information (IP address, name, etc.) about hosts, domains, and networks under the authority of the server. This is ctilled the domain zone. 

Domain name servers can communicate with each other by passing information retrieved from their databases. If a host wishes to resolve a name, it sends a query to the nearest domtiin name server, which will provide the answer by using its local database, called a cache. However, if necessary, it forwards the query to other servers. The Internet domain name service system is the largest distributed database in the world. 

Corporate zone This is the business area such as email servers, domain name servers (DNS), etc. On account of connectivity (Fig. XI/4.1.3-1) to the external zone it has a lot of risks and less priority (however, much higher than the external zone). 

DNS (domain name system or server) domain name... 

A, B, C, D. A proper IP address and subnet mask are essential for any sort of network communication. However, to reach the Internet, a default gateway, which is the IP address of the router your machine uses to access the Internet, must be configured. You also need the Domain Name System (DNS) server, so you can type www.yahoo.com instead of having to remember the numeric IP address. 

Domain Name System (DNS) DNS allows TCP/IP-capable users anywhere in the world to find resources in other companies or countries by using their domain name. Each domain is an independent namespace for a particular organization, and DNS servers manage requests for information about the IP addresses of particular DNS entries. DNS is used to manage all names on the Internet. 

Although the domain name system (DNS) is technically not part of the TCP/ IP protocol, it is nearly essential for Internet operation. For example, one could connect to http //207.171.181.16/, but nearly all Internet users prefer http // www.amazon.com. DNS translates from name to number using a database distributed throughout the Internet. The translation starts at the root DNS servers, which know where to find. go,. eddo,. czar, etc. Servers databases contain long lists of subdomains—there are tens of millions in the. com database—that point to the name servers for individual domains. For example, DNS tells us that one of the servers that knows about the hosts in amazon.com is at IP address 207.171.167.7. 

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