Top 30 DNS Interview Questions and Answers

DHCP is a protocol that assigns IP addresses to devices on a network. DNS is a system that translates domain names to IP addresses.

• DHCP assigns IP addresses to devices on a network

• DNS translates domain names to IP addresses

• DHCP reduces the need for m...read more

DNZ records are used to map domain names to IP addresses for external-facing services.

• DNZ stands for DeMilitarized Zone

• DNZ records are used for external-facing services like web servers, email servers, etc.

• They map domain names to IP addresses

• DNZ rec...read more

To find DNS of a website using Linux command

• Use 'nslookup' command followed by the website URL

• Alternatively, use 'dig' command followed by the website URL

• Both commands will display the DNS information of the website

DNS port is a network port used for DNS communication.

• DNS port is usually port 53 for both TCP and UDP protocols.

• It is used for resolving domain names to IP addresses.

• DNS queries and responses are sent over this port.

• Firewalls and routers may block o...read more

DNS translates domain names to IP addresses and vice versa.

• DNS stands for Domain Name System.

• It works by translating domain names to IP addresses and vice versa.

• DNS has several stages including recursive and iterative queries, caching, and authoritat...read more

Entering google.com initiates a series of network requests to retrieve and display the website content in your browser.

• 1. DNS Resolution: The browser queries a DNS server to resolve 'google.com' to an IP address.

• 2. TCP Connection: A TCP connection is...read more

Domain is a group of computers and devices that share a common network identity. DNS is a system that translates domain names to IP addresses.

• Domain is a logical grouping of computers and devices that share a common network identity.

• DNS stands for Do...read more

DNS stands for Domain Name System. It is a hierarchical decentralized naming system for computers, services, or other resources connected to the internet or a private network.

• DNS translates domain names into IP addresses

• DNS records include A, AAAA, C...read more

DNS (Domain Name System) is a protocol used to translate domain names into IP addresses.

• DNS is essential for translating human-readable domain names (like google.com) into machine-readable IP addresses (like 172.217.3.206)

• DNS operates using a client-...read more

AD is Active Directory, a Microsoft service for managing users, computers, and resources. DNS is Domain Name System, a protocol for translating domain names to IP addresses.

• AD is used for centralized authentication and authorization of users and comp...read more

A forward lookup zone is a DNS zone that translates domain names to IP addresses.

• It is used to resolve domain names to their corresponding IP addresses.

• It contains records that map domain names to IP addresses.

• It allows clients to access resources on...read more

To add a system in domain with DNS error, first resolve the DNS issue and then add the system to the domain.

• Check the DNS settings and ensure they are correct

• Verify that the DNS server is running and accessible

• Flush the DNS cache on the system

• If nece...read more

DNS name resolution translates domain names to IP addresses.

• When a user types a domain name in the browser, the DNS resolver sends a query to the DNS server.

• The DNS server looks up the domain name in its database and returns the corresponding IP addr...read more

DHCP is a protocol that assigns IP addresses to devices on a network. DNS is a system that translates domain names to IP addresses.

• DHCP assigns IP addresses to devices on a network

• DNS translates domain names to IP addresses

• DHCP reduces the need for m...read more

DNS (Domain Name System) is a system that translates domain names into IP addresses.

• DNS works by sending requests from a client to a DNS server, which then responds with the corresponding IP address for the requested domain name.

• DNS zone transfer is ...read more

DNZ records are used to map domain names to IP addresses for external-facing services.

• DNZ stands for DeMilitarized Zone

• DNZ records are used for external-facing services like web servers, email servers, etc.

• They map domain names to IP addresses

• DNZ rec...read more

nslookup is a command-line tool used to query DNS servers to obtain domain name or IP address information.

• Used to troubleshoot DNS-related issues

• Can be used to query specific DNS servers

• Provides information such as IP address, domain name, and DNS se...read more

Mapping of IP with DNS involves associating domain names with IP addresses for easier access on the internet.

• DNS (Domain Name System) is a system that translates domain names to IP addresses.

• IP addresses are unique identifiers assigned to devices con...read more

To find DNS of a website using Linux command

• Use 'nslookup' command followed by the website URL

• Alternatively, use 'dig' command followed by the website URL

• Both commands will display the DNS information of the website

DNS types used in routing include A, AAAA, CNAME, and MX records.

• A record: Maps a domain name to an IPv4 address

• AAAA record: Maps a domain name to an IPv6 address

• CNAME record: Maps an alias domain name to the canonical domain name

• MX record: Specifies...read more

WSUS stands for Windows Server Update Services, a tool used by Windows administrators to manage and distribute updates within a network. DNS stands for Domain Name System, a system that translates domain names to IP addresses.

• WSUS is used to centrall...read more

DNS port is a network port used for DNS communication.

• DNS port is usually port 53 for both TCP and UDP protocols.

• It is used for resolving domain names to IP addresses.

• DNS queries and responses are sent over this port.

• Firewalls and routers may block o...read more

DNS is a system that translates domain names to IP addresses. DNS server is a computer that stores DNS records.

• DNS stands for Domain Name System

• DNS server stores DNS records which contain information about domain names and their corresponding IP addr...read more

Route53 is a scalable and highly available DNS service provided by AWS.

• Route53 can be used to register domain names and route internet traffic to resources like EC2 instances, S3 buckets, and load balancers.

• It can also be used for health checks and f...read more

DNS servers translate domain names into IP addresses to enable communication between devices on the internet.

• DNS servers act as a phone book for the internet, translating domain names into IP addresses.

• When a user types a domain name into their brows...read more

DNS translates domain names to IP addresses and vice versa.

• DNS stands for Domain Name System.

• It works by translating domain names to IP addresses and vice versa.

• DNS has several stages including recursive and iterative queries, caching, and authoritat...read more

DNS is a system that translates domain names to IP addresses, while DHCP is a protocol that assigns IP addresses to devices on a network.

• DNS stands for Domain Name System and is used to translate domain names (e.g. www.google.com) to IP addresses (e....read more