Essay On DNS

A hierarchical system of servers and services specifically designed to translate IP addresses into domain names (forward lookups) as well as the reverse (reverse lookups) is called:

Domain structure – the Domain Structures allows the users or the program to interpret different information. For example take the address: http://www.netflix.com/

2. What does the /etc/resolv.conf file do? What do the nameserver lines in this file do?

Host companies and Internet Service Providers interact with the Central Registry to get updated DNS information.

Root Server: these are a fixed set of name servers that manage the list of authoritative name servers for every domain, usually contracted to provide the service by ICANN. A full list of root servers can be found at http://root-servers.org/.

The IP address is given a unique identification it is one of kind IP address, so it can be trace for any internet activity and find the exact location of website. Domain names are used because it is easier to remember the name rather than the entire website address. All computers on the net have what area unit termed net Protocol addresses ordinarily called associate degree scientific discipline address to be ready to communicate across the network. These addresses, that area unit assigned to all or any computers on a network, area unit created of numerals separated by a dot that don't seem to be essentially simple for North American country to recollect. Therefore, whereas computers simply use these scientific discipline addresses to attach and communicate with one another, it's somewhat more difficult for North American country. It's with keeping such in mind that, net designers and controllers have return up with a translation system that identifies additional simply remembered characters with every and each scientific discipline address. With DNS we need to have the integrated namespace so following DNS use is proposed: an internal DNS namespace, used only on your own network; internal DNS to communicate with external DNS forwarding; and an external DNS namespace to communicate with external

DNS stands for ‘Domain Name System’. It is an internet service that works like a

click Operations Master to view the server holding the domain naming master role in the Forest.

12. Which Web page appears when you key a URL containing the server’s IP address instead of a name? Why?

DNS- DNS stands for domain name server and is a network of servers that keep track of Internet Domain Names. Its main job is to authenticate and find domains. It translates IP Addresses into numbers, for example, 172.194.40.143 translates into

The zone is the administrative division that DNS servers use to separate domains. The first step in implementing the DNS namespace you designed is to create a zone representing your root domain.

Subdomain- With DNS naming terminology, this term refers to a part of a host name (or domain name). That smaller part can be the part that a company registers through IANA or some authorized agency to identify all hosts inside that company.

| When you create a domain within a zone, you specify the name for the new domain relative to the zone name. For example, to create the qa.contoso.com domain in the contoso.com zone, you would specify only the qa name in the New DNS Domain dialog box.

The Internet is, quite literally, a network of networks. It is comprised of ten thousands of interconnected networks spanning the globe. The computers that form the Internet range from huge mainframes in research establishments to modest PCs in people's homes and offices. Despite the recent hype, the Internet is not a new phenomenon. Its roots lie in a collection of computers that were linked together in the 1970s to form the US Department of Defense's communications systems. Fearing the consequences of nuclear attack, there was no central computer holding vast amounts of data, rather the information was dispersed across thousands of machines. A set of rules, of protocols, known as TCP/IP was

The Domain Name System is most often described as the Internet’s phone book or address book. All of us Internet users use it on daily basis without even realizing it. Its basic task is to convert human-readable website name like coursera.org into its computer-readable numerical IP address like 107.21.240.231.Since such strings of numbers are difficult for humans to memorize, DNS allows you to assign a domain name, such as facebook.com to you IP address. So, the domain name is simply an address on the Internet. It has to be unique just like physical address or phone number.