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12th Standard English Medium Computer Applications Subject DNS (Domain Name System) Book Back 3 Mark Questions with Solution updated Book back Questions

Published on: 13/05/2022

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Std: 12th Standard - Computer Applications

chapter: - Book back Questions

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Questions:

Generic 3

5 x 3 = 15

Write a note on domain name.

What are the differences between Absolute URL and Relative URL?

Differentiate Domain name and URL

Differentiate IPv4 and IPv6.

Write a note on DNS.

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Answers Key:

Generic 3

5 x 3 = 15

(i) Domain name is the sequence of labels. In domain name the sequence of labels are separated by dot(.).
(ii) The domain name is always read from the lower level to higher level i.e., from the leaf node to root node.
(iii) The domain name which is obtained by reading the labels from bottom to top, separating each label by dot(.)

SI.No.	Absolute URL	Relative URL
1.	Absolute URL is the complete address of a document on the Internet.	Relative URL is the partial address of a document on the Internet.
2.	Absolute URL contains all the information that are required to find the files on the Internet.	Relative URL contains only file name or file name with folder name.
3.	If any of the four parts is missing, then the browser will not be able to link to the specific file. So, all the four parts are very important in absolute URL.	We can use this type of URL when the file is on the same server related to current document.

URL	Domain Name
(i) It is sequence of labels. Sequence of labels are separated by dot(.)	(i) URL is the address of a document on the Internet
(ii) Domain name is always read from the lower level to higher level (ie) From leaf node to root node.	(ii) URL is made up of four parts - protocols, hostname, folder name and file name.
(iii) Since the root node always represented NULL string, all the domain name ending with dot.	(iii) Each part has its own specific functions.Depending on the applications, additional information can be added to the URL.

No.	IPv4	IPv6
1.	IPv4 address is a 32 bit unique address given to a computer system.	IPv6 address is a 128 bit unique address given to a computer system.
2.	There are two ways to represent the IP address: Binary notation, Dotted-decimal notation.	It follows Hexadecimal number notation.
3.	The number of address that can be formed is 2³².	The number of addresses formed in IPv6 is 2¹²⁸

(i) Domain Name System (DNS) maintains all the directory of domain names and help us to access the websites using the domain names.
(ii) It translates the domain name into IP address.
(iii) The foure important components of the Domain Name System are Namespace, Name Server, Zone and Resolver.