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Top 100+ Domain Name System(dns) Interview Questions And Answers - May 29, 2020

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Top 100+ Domain Name System(dns) Interview Questions And Answers

Question 1. What Is Dns?

Answer :

Domain Name System is a provider that may be established on any home windows server running gadget to clear up the Name to IPAddress and vice-versa. TCP/IP networks, such as the Internet, use DNS to discover computers and offerings thru person-pleasant names.

Question 2. What Is Ddns?

Answer :

Dynamic DNS or DDNS is a method of updating, in real time, a Domain Name System to point to a converting IP deal with on the Internet. This is used to offer a chronic domain name for a resource that may exchange region on the community.

Networking Interview Questions
Question 3. What Are The Resource Records In Dns?

Answer :

A (Address) Maps a number call to an IP cope with. When a computer has more than one adapter playing cards and IP addresses, it should have multiple address information.
CNAME (Canonical Name) Sets an alias for a number call. For example, the usage of this document, zeta.Tvpress.Com could have an alias as www.Tvpress.Com.
MX (Mail Exchange) Specifies a mail change server for the domain, which allows mail to be introduced to the proper mail servers within the domain.
NS (Name Server) Specifies a name server for the area, which permits DNS lookups within numerous zones. Each primary and secondary name server should be declared through this report.
PTR (Pointer) Creates a pointer that maps an IP address to a host call for reverse lookups.
SOA (Start of Authority) Declares the host this is the maximum authoritative for the zone and, as such, is the exceptional source of DNS facts for the region. Each area record ought to have an SOA record (that's created automatically when you add a region).

Question 4. What Are A Forward And Reverse Lookup?

Answer :

Forward Lookup: When a call question is send to the DNS server towards to IP address, it's far usually stated a forward lookup.
Reverse Lookup: DNS also offers a opposite lookup technique, enabling clients to apply a recognized IP cope with at some point of a name query and look up a pc name based on its deal with.

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Question five. What Is Primary Zone?

Answer :

This is the study and writable replica of a area report in the DNS namespace. This is number one source for information about the sector and it stores the grasp replica of sector records in a neighborhood record or in AD DS. Dy default the primary area report is known as as zone_name.Dns in %windirp.CSystem32DNS folder on the server.

System Administration Interview Questions
Question 6. What Id Secondary Zone?

Answer :

This is the examine most effective reproduction of a zone report inside the DNS namespace. This is secondary source for data about the region and it get the updated data from the grasp replica of primary quarter. The network get entry to must be to be had to connect with number one server. As secondary area is simply a duplicate of a number one quarter that is hosted on any other server, it cannot be saved in AD DS.

Question 7. What Is Stub Zone?

Answer :

A stub region is a read handiest copy of a area that carries only the ones resource data which can be necessary to become aware of the authoritative DNS servers for that unique quarter. A stub sector is practically used to resolve names among separate DNS namespaces. This form of quarter is usually created when a company merger or accumulate and DNS servers for two separate DNS namespaces remedy names for clients in both namespaces.
A stub zone contains:

The start of authority (SOA) useful resource record, call server (NS) aid records, and the glue A useful resource records for the delegated quarter.
The IP address of 1 or greater master servers that may be used to replace the stub zone.
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Question eight. What Is Caching Only Server?

Answer :

Caching-most effective servers are those DNS servers that most effective perform call resolution queries, cache the solutions, and return the consequences to the patron. Once the question is stored in cache, next time the question in resolved domestically from cached rather than going to the real website.

Question 9. What Is Aging And Scavenging?

Answer :

DNS servers going for walks Windows Server help growing older and scavenging features. These functions are furnished as a mechanism to perform cleanup and elimination of stale useful resource records from the server and area. This function eliminates the dynamically created records while they're stamped as stale.
By default, the ageing and scavenging mechanism for the DNS Server carrier is disabled.
Scavenging and getting old have to be enabled each on the DNS server and at the region

Exchange Server 2010 Interview Questions
Question 10. What Is Srv Record In Dns?

Answer :

The SRV document is a resource report in DNS that is used to identify or factor to a pc that host specific offerings i.E Active listing.

Question eleven. What Is Forwarding In Dns?

Answer :

A forwarder is a characteristic in DNS server that is used to forward DNS queries for outside DNS names to DNS servers out of doors of that community. We ca configure a DNS server as a forwarder to ahead the call query to different DNS servers in the network after they can't clear up domestically to that DNS server.

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Question 12. What Is Conditional Forwarding In Dns?

Answer :

We can configure the DNS server to forward queries according to precise domain names the usage of conditional forwarders. In this case query is ahead to an IP cope with towards a DNS area name.

Networking Interview Questions
Question 13. What Are Queries Types In Dns?

Answer :

Recursive Query: This name queries are normally made with the aid of a DNS consumer to a DNS server or by using a DNS server this is configured to pass unresolved name queries to another DNS server, in the case of a DNS server configured to use a forwarder.
Iterative Query: An iterative call query is one in which a DNS customer lets in the DNS server to go back the quality answer it may give based on its cache or zone records. If the queried DNS server does now not have an specific match for the queried name, the nice feasible facts it is able to go back is a referral. The DNS patron can then query the DNS server for which it received a referral. It keeps this method till it locates a DNS server that is authoritative for the queried name, or until an error or time-out condition is met.

Question 14. What Are Tools For Troubleshooting Of Dns?

Answer :

DNS Console, NSLOOKUP, DNSCMD, IPCONFIG, DNS Logs.

Question 15. How To Check Dns Health?

Answer :

Using the DCdiag.
I.E. (dcdiag /test:dns /v /e)

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Question sixteen. What Is The Use Of Domain Name System?

Answer :

Domain Name Systems are used to help users in finding the region of the web web page over the net.
It gives a completely unique deal with that is in the shape of strings of numbers and it uniquely identifies an internet page.
The cope with this is getting used called as IP address and IP is the protocol used to transfer the records over the community.
Domain Name systems makes it smooth for the user to recall the name and access the net pages easily.
DNS is an trade manner to provide easy to recollect IP addresses and use them to get entry to the web-services without difficulty.
Question 17. Can You Explain What Are The Main Function Of Domain Names?

Answer :

Domain names provide an smooth manner to recognize and memorize the names the usage of the numerically addressed Internet sources.
It is used to cope with the Internet assets located on net or it presents and abstraction that allows the resources to be moved from one place to another in hierarchy.
It presents a manner to transport the resources in a topological shape and provide the interpretation to be carried out using the IP addresses and domains.
Domain names offer a way to the registrants to refer to the area owners for their registration of the area and feature the possession of it.
Exchange Server 2007 Interview Questions
Question 18. What Are The Factors Involved In Guiding The Panelists Decisions?

Answer :

Panelists are very critical people that take the decision on the cases and on the idea of standards come up with the decision.
The UDRP coverage is being contained and the usage of the realistic examples the disputes can be solved.
The standards required are as follows:

The area is same to another area or it isn't always clean for the trademark option or the carrier mark with which the grievance has been registered.
The respondent of the domain has the rights to have the area name and for that the providing of products and services being supplied to the respondents with the identical call.
The domain turned into registered and utilized in bad faith with the aid of other people or business enterprise or employer.
System Administration Interview Questions
Question 19. Explain What Are The Results Of The Procedures Followed By Udrp?

Answer :

The result of the procedure follows the area name to either transfer or the grievance is being denied.
During the denying of the criticism the respondent is permitted to preserve the domain name and can cancel the domain call.
No economic damage is being accomplished on the idea of area name disputes and no provision of injunctive remedy is being furnished.
Domain call registrars offer a way to put in force the selection in a period of their time with their appeal in the court.
The panel with a purpose to sit down for the choices could be of permitted registrars who will take the selections on the basis of disputes.
Question 20. What Are The Steps Involved In Registering The Domain?

Answer :

To check in the domains the registering of the entry into the listing is being positioned where the domain names can be registered consistent with the computer systems.
Domain names are used to offer a manner to get right of entry to the web pages and they stop with .Aero, .Biz, .Com, .Coop, .Info, .Museum, .Call, .Internet, .Org, or .Seasoned.
The domain names can be registered the usage of unique registrars or groups that deal in registration technique.
The domain gets registered through providing the information given inside the registration manner and a record is being maintained for the identical.
The technical statistics being provided to the registrars get saved to a valuable listing called registry.
The registry gives all the data on distinct computers which might be linked to the Internet and accessing the net web page.
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Question 21. What Is The Directory Structure Of The Domain Names?

Answer :

Domain names are used as a networking concept with addressing and application motive.
The domain call is used to represent the Internet Protocol (IP) that offers the resources for the private computer to permit the gaining access to of the net.
Domain names are represented from the subordinate level and additionally called as sub-domains which can be underneath the foundation domain.
There are three levels of domains:
Top degree domains are used at the top of the hierarchy and offer a manner down to the bottom stage within the hierarchy.
This consists of gTLDs are also known as typical pinnacle-degree domains and used for terribly universal domain names like .Com, .Net and .Org.
This includes ccTLD are also called code pinnacle-stage domains and used to offer code domain names.
Question 22. What Is The Role Of Udrp?

Answer :

UDRP stands for Uniform Domain Name Dispute Resolution Policy this is being given with the aid of the Internet Corporation for Assigned Names and Numbers (ICANN).
UDRP affords the guidelines and uses the reviews made with the aid of WIPO. This way the report is being analyzed and certain moves taken on that.
The Report in the WIPO on the Internet Domain Name Process gives the facts of disputes and problems.
UDRP presents a manner to file the problems or conflicts which can come among the logos and the domains.
The reports produced may be identified by the usage of First WIPO Process and it is able to be addressed greater in other exchange port area.
Question 23. Do You Know How Does Udrp Function?

Answer :

A trademark holder is involved in the complete method that gives a domain call registration and works below UDRP machine.
The trendy disputes are recorded and clauses are being made with terms and conditions the usage of the gTLD area name registration.
UDRP allows the court cases to be filed with a decision provider company and specifies the area name for which the question is being raised.
The grounds on which the decision is being provided consist of the domain call to be identical or similar to the names of emblems.
The respondent is being given the threat to guard the case by way of placing the perspectives at the allegations and provides a crew to help the respondent in this count.
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Question 24. What Is The Provision To Change The Registrars After Registering A Domain Name?

Answer :

The provision to check in the area requires sponsorship for the domain name and it calls for a time to check in it.
The transfer of the registration procedure may be completed by way of any registrar and they can offer the sponsorship for the registration.
The registrars of the authorized with the aid of ICANN that is authorized to the register like .Aero, .Biz, .Com, .Coop, .Information, .Museum, .Name, .Net, .Org, or .Seasoned names.
The registrars which might be used to sign up the domains offer the offerings using the resellers program which can offer the help for the registration system.
Registration contract can be accredited with the registrar and it'll be his responsibility to maintain the facts.
FTP Script Interview Questions
Question 25. What Is The Purpose Of Domain Name Space?

Answer :

ICANN additionally called Internet Corporation for Assigned Names and Numbers provide gear to manage the hierarchy.
The control of it includes the top degree domains which can be being advanced or which might be beneath manner.
The structure of it's far designed using the Internet domain name space as it permits the authorization to be executed from the registrars.
The Domain call space is needed to permit the web hosting of the files andeasy control through the portal.
It lets in a hierarchical courting to be maintained and prepared in the zones which might be being served by using the area call servers.
Question 26. What Is The Function Of Wipo To Resolve The Disputes Taking Place?

Answer :

ICANN is the agency that looks into the domain names registration and provides an easy manner to get it executed as properly.
WIPO makes it less difficult for corporations to do the business with none international felony requirements.
It presents the top stage area control like .Com, .Internet and .Org to resolve the dispute that has arise due to a few problems.
It offers a manner to negotiate at the laws which can be on the countrywide and international stage and receives uniformed through a few tactics.
WIPO affords safety to the intellectual assets in international market and offer consultancy to the participants of Internet community.
It affords the prepared and published reports to the network that includes the pointers that offers with the domain name troubles.
Dns Server Interview Questions
Question 27. Explain What Is The Purpose Of Wipo Providing A Resolution Service Provider?

Answer :

WIPO's resolution service provides relatively certified organization of groups and calls for the administrative tactics.
This entails the credibility of the WIPO to offer quicker resolution of the troubles that is being presented.
The dispute decision is being given at an awful lot quicker pace inside the courts and it lets in the area to file the case this is made with the web manner.
WIPO reduces the price this is lower than the normal litigation and it affords help to clear up certain disputes.
Filing of the requirements is needed to help lessen the expenses and provide resolutions for the domain names that involve a unmarried panelist with very much less fee.
Exchange Server 2010 Interview Questions
Question 28. What Is The Role Of Icann In Domain Names?

Answer :

ICANN is a non-profit organization that has the obligations to manipulate all of the technical features.
It manages the technical functions and includes the overall control of the Internet Domain Name System.
It has registrars accredited with the ICANN and all of them comply with a uniform dispute decision coverage in case  companies fight for identical registered name.
The disputes are being handled with the aid of ICANN and it additionally gives the resources to check in the domain and proceed with all of the prison method.
ICANN provides protection and offers with the instances that come as a dispute in the courtroom for prison purposes.
Question 29. Can You Explain What Are The Factors Involved In Guiding The Panelists Decisions?

Answer :

Panelists are very critical humans that take the decision on the cases and on the premise of standards come up with the decision.
The UDRP policy is being contained and the usage of the sensible examples the disputes can be solved.
The criteria required are as follows:
The area is equal to some other area or it isn't clean for the trademark alternative or the carrier mark with which the complaint has been registered.
The respondent of the area has the rights to have the area call and for that the imparting of products and offerings being supplied to the respondents with the equal call.
The area was registered and utilized in awful religion by way of other humans or agency or corporation.
Windows Server Dns Interview Questions
Question 30. What Are The Reasons Of Having Disputes?

Answer :

The motives of getting disputes are as follows:

No proper settlement to proceed with the situations and because of the growing community of internet an increasing number of people are looking to compete with each other.
No settlement is being given to the companies for letting them check in the domains to apply the names which might be complex.
It lets in clean registration of the enterprise but later have practical difficulties to hold on with it due to the name rights, and so forth.
The growing business price is likewise one of the motives of disputes for the domain names that is being at the internet.
More and greater cybersquatting taking place that is bringing more disputes among the cybersquatters and groups those have their name registered.
Question 31. Do You Know How Does Wipo Ensure That There Is No Conflict Of Interest?

Answer :

WIPO offer a way to deal with the dispute by way of supplying a dispute method and administrating it for any changes.
The communication is being achieved between the distinct events and it maintains numerous situations that provide the resolutions of disputes going on.
An appointment of the professional is being reviewed in which the problem is being resolved by means of taking a selection by means of the expert.
It includes the unbiased individuals that decides the cases for each of the individuals and considers the level of dispute.
Panelists are used to confirm the WIPO dispute manner so that certain actions can be taken at the a part of the disputes.
Question 32. What Are The Rules For Registration Of .Biz, .Com, .Information, .Call, .Net And .Org Names?

Answer :

The domains can be registered without any limit and offer open cozy channel to record the names for registration.
The domains that are shown differently used for extraordinary domain names and industries that involves the net infrastructure.
The activities for the registration being performed on the basis of domain names that needs to be taken as an example .Org.
There are one-of-a-kind domain names with exclusive purposes like .Org is used for non-business organizations and .Biz for enterprise functions.
After area registration some legal forms want to be crammed to check in the domain with the registrar after checking the supply.
Question 33. What Is Authoritative Name Server?

Answer :

An authoritative call server is a call server that gives answers which have been configured via an authentic supply, as an example, the domain administrator or through dynamic DNS strategies, in assessment to answers that were acquired thru a regular DNS question to another name server. An authoritative-simplest name server handiest returns solutions to queries approximately domain names that have been particularly configured via the administrator.

DHCP Interview Questions
Question 34. What Is The Nature Of Domain Name Disputes?

Answer :

Domain call disputes allow the customers to find the computer systems and those in an clean way.
Domain call has significance that has received enterprise needs and identifiers to perceive the commercial enterprise and goal best the organizations current.
These disputes are covered with the aid of highbrow property rights that include the guidelines and policies to tackle the disputes.
The disputes rises because of the cybersquatting this affords a manner to pre-emptive the registration method for the trademarks by means of 0.33 parties and as a site names.
Domain names are registered and centered for the advantage of different individual or organisation. It is being accomplished with the aid of the cybersquatters.
Domain names are being registered with the identical domain names by means of most important cybersquatters and put up for the auctions to illegally use the call of the character or the organization to gain themselves.
Question 35. Tell Me What Are The Ways To Administer The Cases Under Udrp?

Answer :

UDRP is used to settle the disputes by means of offering the domain call carrier provider and it presents facilities for top stage domain names.
The top stage domains like .Com, .Net, and .Org are the established domains that encompass regulations much like the URDRP.
WIPO offers a way to remedy the services for the u . S . Code top stage domain names and it really works underneath the precept of UDRP.
WIPO domain call system affords a way to address the disputes this is being raised by using the protection identifiers apart from the trademarks.
It presents the geographical indicators and monitors the overall activities like personal names, exchange names or acronyms of international intergovernmental groups.
Question 36. What Are The Rules Of Registration For The Domains Like .Uk, .In, Etc.?

Answer :

To check in the domain name it's far required to recognize the ccTLDs which can be related to the geographic region.
There are guidelines and policies which can be registered for the domain names and looking for the area call takes place that are reserved for the nations.
The checking want to, be achieved for the registration process from the registrar that gives ccTLD registration services.
ICANN calls for the registration offerings inside the ccTLDs provide the registration and its offerings.
It gives the database this is exact to the managers and that includes the complete database.
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Question 37. What Is The Main Purpose Of A Dns Server?

Answer :

DNS servers are used to solve FQDN hostnames into IP addresses and vice versa.

Question 38. What Is A Forward Lookup?

Answer :

Resolving Host Names to IP Addresses.

Question 39. How Do I Set Up Dns For A Child Domain?

Answer :

To installation DNS for a kid area, create a delegation file at the determine DNS server for the kid DNS server. Create a secondary quarter on the kid DNS server that transfers the discern area from the discern DNS server.
Note Windows Server 2003 has additional varieties of zones, together with Stub Zones and woodland-degree incorporated Active Directory zones, that is a higher healthy in your surroundings. Set the child area controller to point to itself first. As soon as an additional area controller is available, set the kid area controller to point to this domain controller within the infant area as its secondary.

Question 40. What Should I Do If The Domain Controller Points To Itself For Dns, But The Srv Records Still Do Not Appear In The Zone?

Answer :

Check for a disjointed namespace, after which run Netdiag.Exe /restore.
You should install Support Tools from the Windows 2000 Server or Windows Server 2003 CD-ROM to run Netdiag.Exe.

Exchange Server 2007 Interview Questions
Question forty one. What Is The Main Purpose Of Srv Records?

Answer :

SRV records are utilized in locating hosts that provide certain network offerings.

Question forty two. Before Installing Your First Domain Controller In The Network, You Installed A Dns Server And Created A Zone, Naming It As You Would Name Your Ad Domain. However, After The Installation Of The Domain Controller, You Are Unable To Locate Infrastructure Srv Records Anywhere In The Zone. What Is The Most Likely Cause Of This Failure?

Answer :

The quarter you created was now not configured to allow dynamic updates. The neighborhood interface on the DNS server turned into not configured to allow dynamic updates.

Activity Based Costing Interview Questions
Question forty three. How Do I Clear The Dns Cache On The Dns Server?

Answer :

Go to cmd prompt and type ipconfig /flushdns .

Question forty four. Soa Records Must Be Included In Every Zone. What Are They Used For?

Answer :

SOA facts contain a TTL cost, utilized by default in all useful resource records within the region. SOA facts include the email deal with of the individual that is chargeable for keeping the area. SOA data include the modern serial variety of the area, that is utilized in quarter transfers.
By default, if the name isn't always determined in the cache or local hosts record, what is the first step the patron takes to resolve the FQDN name into an IP deal with? Performs a recursive seek thru the primary DNS server based totally at the network interface configuration.

Question forty five. What Is Wins Server? Where We Use Wins Server? Difference Between Dns And Wins?

Answer :

WINS is home windows net call carrier used to remedy the NetBIOS(computer call)call to IP cope with.This is proprietary for Windows.You can use in LAN.DNS is a Domain Naming System, which resolves Host names to IP addresses. It uses fully qualified domain names. DNS is an Internet trendy used to remedy host names.

Question forty six. What Is Forwarder?

Answer :

When one DNS server can not obtain the query it may be forwarded to every other DNS once configured as forwarder.

Question 47. What Is Secondary Dns Server?

Answer :

It is backup for number one DNS where it keeps a study most effective replica of DNS database.

Question 48. How To Enable Dynamic Updates In Dns?

Answer :

Start>Program>Admin gear> DNS >Zone properties.

Question forty nine. What Are The Properties Of Dns Server?

Answer :

INTERFACES, FORWARDERS, ADVANCED, ROUTINGS, SECURITY, MONITORING, LOGGING, DEBUG LOGGING.

Question 50. Properties Of A Zone?

Answer :

General, SOA, NAMESERVER, WINS, Security, and ZONE Transfer.

Question 51. What Is Scavenging?

Answer :

Finding and deleting undesirable facts.

Question fifty two. What Are Srv Records?

Answer :

SRV are the provider statistics, there are 6 carrier information. They are beneficial for finding the offerings.

Question fifty three. What Are The Types Of Srv Records?

Answer :

MSDCS:Contains DCs statistics.

TCP:Contains Global Catalog, Kerberos & LDAP facts.

UDP:Contains Sites statistics.

Sites:Contains Sites information.

Domain DNS Zone:Conations domain?S DNS unique facts.

Forest DNS region:Contains Forest?S Specific Information.

Question fifty four. Where Does A Host File Reside?

Answer :

c:windowssystem32driversetc.

Question fifty five. What Is Primary, Secondary, Stub Zone?

Answer :

Primary Zone: - region that is stored as normal textual content document with filename (.Dns) in DBS folder. Maintains a read, write replica of region database.
Secondary Zone: - continues a read simplest replica of sector database on another DNS server. Provides fault tolerance and load balancing by using acting as backup server to primary server.
Stub region: - contains a duplicate of call server and SOA information used for reducing the DNS seek orders. Provides fault tolerance and load balancing.

Question fifty six. How Do You Manually Create Srv Records In Dns?

Answer :

This is on windows server go to run ---> dnsmgmt.Msc rightclick at the area you need to add srv record to and pick "different new record" and pick out carrier vicinity(srv).

Question 57. What Is The Port No Of Dns?

Answer :

The port wide variety of DNS is 53.

Question fifty eight. Soa Records Must Be Included In Every Zone. What Are They Used For ?

Answer :

SOA records incorporate a TTL fee, used by default in all useful resource information within the quarter. SOA facts comprise the email cope with of the person that is responsible for maintaining the quarter. SOA facts include the contemporary serial range of the zone, that is used in sector transfers.

Question fifty nine. By Default, If The Name Is Not Found In The Cache Or Local Hosts File, What Is The First Step The Client Takes To Resolve The Fqdn Name Into An Ip Address?

Answer :

Performs a recursive seek through the number one DNS server primarily based on the network interface configuration.

Question 60. Which Of The Following Conditions Must Be Satisfied To Configure Dynamic Dns Updates For Legacy Clients?

Answer :

The sector to be used for dynamic updates should be configured to permit dynamic updates. The DHCP server need to help, and be configured to permit, dynamic updates for legacy customers.




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