NETWORK SECURITY
FIREWALLS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A programming language
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A network security protocol
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A decentralised naming system that associates domain names with IP addresses
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A network interface card
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Detailed explanation-1: -The domain name system (DNS) is a naming database in which internet domain names are located and translated into Internet Protocol (IP) addresses. The domain name system maps the name people use to locate a website to the IP address that a computer uses to locate that website.
Detailed explanation-2: -The DNS is a distributed system, implemented in a hierarchy of many name servers. The decentralized administration is achieved through delegation.
Detailed explanation-3: -Root servers are located all around the world, so the DNS system routes the request to the closest one. Once the request reaches the correct root server, it goes to a top-level domain server (TLD nameserver), which stores information for the second-level domain, which is the words that you type into a search box.