COMPUTER SCIENCE AND ENGINEERING
COMPUTER NETWORKING
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
translate a domain name into the correct IP address
|
|
|
translate an IP address into a domain name
|
|
|
Gives names to websites which aren’t named
|
|
|
Leaves websites alone
|
Detailed explanation-1: -DNS servers translate requests for names into IP addresses, controlling which server an end user will reach when they type a domain name into their web browser. These requests are called queries.
Detailed explanation-2: -DNS PTR Record The Pointer or PTR record specifies the domain name associated with a specific IP address. It’s the opposite of an A record, and it’s used in reverse DNS lookup. A reverse DNS lookup is a process that starts with the IP address and returns with the associated domain name.
Detailed explanation-3: -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.
Detailed explanation-4: -If the name gets resolved by the DNS query then the browser will now have the IP address and use it to initiate a connection with the web server at that IP address.
Detailed explanation-5: -DNS keeps the record of all domain names and the associated IP addresses. When you type in a URL in your browser, DNS resolves the domain name into an IP address. In other words, DNS is a service that maps domain names to corresponding IP addresses.