DNS MCQ Quiz in मराठी - Objective Question with Answer for DNS - मोफत PDF डाउनलोड करा

DNS: (Domain Name System)

• The Domain Name System is a hierarchical and decentralized naming system for computers, services, or other resources connected to the Internet or a private network.
• DNS protocol is used for Domain names to IP Address mapping.

HTTP: (Hypertext Transfer Protocol)

• It is an application-layer protocol for transmitting hypermedia documents, such as HTML.
• It was designed for communication between web browsers and web servers, but it can also be used for other purposes

SMTP: (Simple Mail Transfer Protocol)

• SMTP is used when email is delivered from an email client, such as Outlook Express, to an email server or when email is delivered from one email server to another.
• SMTP uses port 25.

POP (Post Office Protocol)

• POP is a type of computer networking and Internet standard protocol that extracts and retrieves email from a remote mail server for access by the host machine.

FTP (File Transfer Protocol)

• FTP stands for file transfer protocol. It is provided by TCP/IP for copying a file from one host to another. FTP can transfer a file through one of the following three modes: stream mode, block mode and compressed mode. Stream mode is the default mode.
• FTP uses two TCP connections one for data and another for control.

Therefore option 2, 3, and 4 does not match.

Domain Name System (DNS)

• The Domain Name System (DNS) is a hierarchical and decentralized naming system for computers, services, or other resources connected to the Internet or a private network.
• It associates various information with domain names assigned to each of the participating entities.
•  It translates more readily memorized domain names to the numerical IP addresses needed for locating and identifying computer services and devices with the underlying network protocols.

Domain Name:

A domain name is a label that identifies a network domain: a distinct group of computers under a central administration or authority

Company managing the reservation of domain names is domain name registrar

A domain name registry is a database of all domain names and the associated registrant information in the top-level domains of the Domain Name System (DNS)

Domain registration is the process of acquiring a domain name from a domain name registrar

Concept:

A valid email address consists of an email prefix and an email domain, both in acceptable formats. The prefix appears to the left of the @ symbol. The domain appears to the right of the @ symbol. For example, in the address [email protected], "name" is the email prefix, and "website.com" is the email domain

The three parts of an Email Address are:

• Username - The first part of an email address is the username.
• @ Symbol -  An “at,” or “@,” symbol is the second part of an email address.
• Domain - The last part of an email address is the domain, which can be broken down into two portions: the mail server and the top-level domain.

Hence Option 2 is correct