During a virtual technical event, a Drexel student located in Philadelphia is in

Question

During a virtual technical event, a Drexel student located in Philadelphia is introduced to another student at a small, unknown college in Switzerland. The Drexel student decides to learn more about the college in Switzer land by going to their website from their laptop. Since this website is rarely visited the DNS query to locate it’s IP address generates an iterative query across the Internet. What item below describes some of the queries that were involved with providing the students laptop the IP address of the college’s website?

A.A local DNS server queries a DNS root server followed by a TLD DNS server.

Explanation / Answer

A. A local DNS Server queries a DNS root server followed by a tld server

is the answer of this question .

DNS :it stand for domain name system this system maps names of websites to their IP address .like students of a school / college have unique identity numbers or roll numbers . same way websites have unique address that is called as IP address.so whenever we search for any website say chegg.com so server will look up and will search this by using its IP address .

same way according to question drexel student who is located in philadelphia searched for college website of another student who is in switzerland then server started looking up for college website's IP address.

then comes to another word DNS LOOKUP ,which means a test by which conversion of name into ip address take place at back end side (server side).

for example college website name was www.switzerlandcollege.com . so as drexel entered it in search bar then dns look up tool collected that name and then finded in dns records which was its IP address and then return it to the Drexel.

so firstly local DNS server (on dexter's side) firstly worked as stated above then signals/query reached to DNS root server .

DNS root server: it is that server which is connected to all other DNS servers located at different areas .in other words its like a manager who controls and pass information among other employees of the company.

after that comes TLD DNS server ,TLD stands for TOP level domain which is used to find highest level domain names in the root zones of dns of internet.

for example when dexter searched for www.switzerlandcollege.com then it may be possible that similer names website might exit with little difference . so there TLD DNS server helps to find the most perfect one and return it to the user's screen (here :dexter's screen).

in short :

DNS root server

Convert domain name into IP address

then IP address is searched

hence option A is ANSWER .

Step wise short summary Step -1 Step-2 Step-3 DNS Server

DNS root server

TLD DNS srever

Convert domain name into IP address

then IP address is searched

it is like manager which has record of all local DNS srevers it handel request of DNS srever and help in finding exact address (IP address). It helps in finding the most appropriate and correct address of given domain name .and eliminate confusion.

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