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How do you explain DNS in interview?


To answer this question, candidates can explain what the DNS abbreviation stands for, and its definition. Candidates can also enhance their response by mentioning the general purpose of DNS. Example: ‘DNS is short for domain name system. DNS translates domain names into IP addresses of websites and computers.

How do you explain what DNS is?

DNS, or the Domain Name System, translates human readable domain names (for example, www.amazon.com) to machine readable IP addresses (for example, 192.0. 2.44).

What are DNS responsibilities?

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.

What are the 3 types of DNS?

There are three main kinds of DNS Servers — primary servers, secondary servers, and caching servers.

What is DNS and DHCP?

Domain Name System (DNS) is an Internet service that translates domain names (e.g., its.umich.edu) into IP addresses. Dynamic Host Configuration Protocol (DHCP) is a protocol for automatically assigning IP addresses and other configurations to devices when they connect to a network.

What is DNS in Active Directory?

Active Directory Domain Services (AD DS) uses Domain Name System (DNS) name resolution services to make it possible for clients to locate domain controllers and for the domain controllers that host the directory service to communicate with each other.

Is DNS a protocol?

The Domain Network System (DNS) protocol helps Internet users and network devices discover websites using human-readable hostnames, instead of numeric IP addresses.

What is the need of DNS explain with the help of an example?

(Domain Name System) The Internet’s system for converting alphabetic names into numeric IP addresses. For example, when a Web address (URL) is typed into a browser, DNS servers return the IP address of the Web server associated with that name.

Why do you need a DNS server?

What is Domain Name System and explain what is DNS cache poisoning?

What is domain name system (DNS) spoofing. Domain Name Server (DNS) spoofing (a.k.a. DNS cache poisoning) is an attack in which altered DNS records are used to redirect online traffic to a fraudulent website that resembles its intended destination.

How many DNS servers are there?

Root name server overview In total, there are 13 main DNS root servers, each of which is named with the letters ‘A’ to ‘M’. They all have a IPv4 address and most have an IPv6 address. Managing the root server is ICANN’s responsibility (Internet Corporation for Assigned Names and Numbers).

Which comes first DNS or DHCP?

For example, after a DHCP server has assigned an IP to a requesting client, it can communicate this information to a DNS server which then automatically updates the DNS information.

What is the difference between DNS and IP address?

A system called the Domain Name System, or DNS, associates names, like www.example.com, with the corresponding addresses. Your computer uses the DNS to look up domain names and get the associated IP address, which is used to connect your computer to the destination on the internet.

What is the difference between DNS and domain?

The main difference between domain and domain name server (DNS) is that the domain could be a piece of string that helps to spot a specific web site while the DNS (Domain Name System) could be a server that translates the domain to the corresponding ip address to supply the specified webpage.

What is the difference between DNS and AD?

While DNS domains and AD DS domains typically have the same name, they are two separate objects with different roles. DNS stores zones and zone data required by AD DS and responds to DNS queries from clients. AD DS stores object names and object records and uses LDAP queries to retrieve or modify data.

What is difference between DNS and domain controller?

A DNS (Domain Name Service) provides name resolution services. It translates friendly URLs into IP addresses that the computer can understand. A domain controller runs active directory on a computer network. It authenticates users and devices and organizes the network.

Which layer is the DNS server?

DNS is an Application-layer protocol. The Application layer is the top-most layer on the TCP/IP Model. Just like every application layer protocol, DNS uses the User Datagram Protocol (UDP) on the Transport layer of the TCP/IP model to transport data.

Where is DNS located?

These servers reside in your ISP’s data centers, and they handle requests as follows: If it has the domain name and IP address in its database, it resolves the name itself. If it doesn’t have the domain name and IP address in its database, it contacts another DNS server on the internet.

Is DNS A directory service?

An example of a directory service is the Domain Name System (DNS), which is provided by DNS servers. A DNS server stores the mappings of computer host names and other forms of domain name to IP addresses.

Why is DNS application layer?

Protocols at the Physical, Data-Link, Network, or Transport layers do not use names. Only applications need to use names, so DNS is an application-layer protocol because it allows the application to translate a name into a network address.

What is first generation DNS?

What is Primary DNS? A primary DNS server is the first point of contact for a browser, application or device that needs to translate a human-readable hostname into an IP address. The primary DNS server contains a DNS record that has the correct IP address for the hostname.

What is a domain in a network?

A domain, in the context of networking, refers to any group of users, workstations, devices, printers, computers and database servers that share different types of data via network resources. There are also many types of subdomains.

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