COMPUTER SCIENCE AND ENGINEERING
COMPUTER NETWORKING
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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HTTP is a vehicle for accessing WWW
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SMTP is main protocol used in email
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FTP used for transferring files from one host to another
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DNS used by administrator to manage the internet
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Detailed explanation-1: -There are three main kinds of DNS Servers-primary servers, secondary servers, and caching servers.
Detailed explanation-2: -Answer: From the above given options, the one which is true for DNS name resolution is-option d) All of these. The process in which, an unique Internet Protocol address that is in textual form is being translated to an Internet Protocol address is called DNS resolution.
Detailed explanation-3: -A root server (also called a DNS root nameserver) receives a DNS query that includes a domain name (e.g. www.thousandeyes.com), and responds by directing that request to a top-level domain (TLD) nameserver, based on the TLD of that domain such as .com, . net, and . org.
Detailed explanation-4: -The domain name system (i.e., “DNS”) is responsible for translating domain names into a specific IP address so that the initiating client can load the requested Internet resources. The domain name system works much like a phone book where users can search for a requested person and retrieve their phone number.