COMPUTER NETWORKS AND COMMUNICATIONS
LAN WAN AND THE INTERNET
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Remember the website address for every website we wanted to visit
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Nothing, the DNS doesn’t do anything
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Ring up a company to ask for directions to the website
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Remember the IP address for every website we wanted to visit
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Detailed explanation-1: -If the DNS server doesn’t have the IP address, it will return the authoritative name server or TLD name server. The requester will continue this iterative process until it finds an answer or times out.
Detailed explanation-2: -The DNS server returns the IP address, and the browser connects to the webpage that then appears on your screen. End users are unaware of the background tasks required to make the system work. If the DNS server is unavailable, the browser has no way of acquiring the website’s IP address, so it returns an error.
Detailed explanation-3: -If the local DNS server does not have the host name in its database, it will pass the host name to the ISP’s server to find the name using root nameservers on the internet.
Detailed explanation-4: -To check the host name on the operating system, in a command prompt, type: hostname. Verify the computer name information: Right-click My Computer. Check the host name configured on the DNS server. Run the following command: Check that the host is responding.