Interview Questions.

Q1. What Commands Do We Use For Dns?

We use the subsequent instructions for DNS:

Nslookup (and all interactive mode commands)

Ipconfig /fulshdns

Ipconfig /registerdns

Q2. What Is The Default Time Setting In Primary Zone To Refresh, Retry, Expire Intervals For Secondary Zone?

The default settings are

To Refresh c program languageperiod 10 mins

To Retry interval, 15 minutes

To Expire after 1 day

Q3. What Is The Purpose Of Forward Lookup?

Forward lookup resolves the Hostnames (Friendly Name) to IP addresses.

Q4. What Tabs Are There On Properties Of Domain?

Domain residences include the following tabs:

General

Start of Authority (SOA)

Named servers

WINS

Zone transfers

Q5. What Is Name Resolution?

The manner of translating the call into some object or records that the call represents is called name decision. A smartphone book forms a namespace in which the names of telephone subscribers may be resolved to the telephone numbers.

Q6. What Is A Forwarder?

(Open DNS console ==> Right click on Domain name ==> Click on forwarder tab)

A forwarder is server, which has more get right of entry to than the existing DNS server. May be our gift DNS server is placed in internal community and it cannot clear up the Internet names. Maybe it is behind a firewall or maybe it's miles the usage of a proxy server or NAT server to get to the Internet. Then this server forwards the query to some other DNS server that could resolve the Internet names.

Command activate commands:

Type Nslookup to get into the Nslookup mode.

Type set kind=SOA then press input type area call

Type set kind=NS then press input; and kind domain call.

Type set kind=ALL then press input.

Note: To pop out from Nslookup mode type go out.

Q7. What Is The Structure Of Dns?

The shape of DNS starts offevolved with root domain. Then it (root area) braches to TOP degree domain names, then second degree domains, and so on to the character host names.

 Root Domain –> Top stage Domains–> Second level Domains–> So on so forth up to person host systems

Q8. Where To Create The Primary, Secondary, Active Directory Integrated Zones?

If you want to create an Active Directory integrated area, the server ought to be Domain Controller.

If you want to create the Primary DNS, you can create on Domain Controller or Member server. But if create on member you couldn't get 4 alternatives below the domain which can be supposed for Active directory.

You can create Secondary quarter on a Member Server or on a Domain Controller. There isn't any difference among them.

Q9. What Is Dns?

DNS stands for Domain Name System. It is a hierarchical machine for figuring out hosts on the Internet or on a personal, corporate TCP/IP internetwork. It resolves the IP addresses to host names (or pleasant net names) and Host names to IP addresses.

Q10. Suppose Under The Forward Lookup Zone _msdcs, _tcp, _upd, _sites Are Not There (or You Have Deleted Unexpectedly). How To Get Them Back?

To get them lower back, truly simply forestall and start the netlogon service.

Type the following instructions to stop and begin the net logon carrier:

Net stop netlogon

Net start netlogon

Whenever you create a root zone (i.E., “.”) in a DNS server, the forwards, and root tips tabs can be disabled on that DNS server.

Q11. How To Get Dynamic Update Option?

Right Click on any zone –>houses –>on General tab u gets

Allow Dynamic Updates? [_Yes/No/Secure Updates]

Note: Put continually Dynamic Updates “YES”

Note: If it's far Active Directory Integrated zone you'll get above 3 alternatives.

But if it is Primary or Secondary region you'll get best “YES/NO” (You gained’t get comfy updates)

Q12. How To Install Dns?

We can installation DNS in 3 one-of-a-kind ways:

While putting in Operating System: While putting in Operating System, It asks at Network Settings whether you want Typical settings or Custom Settings. Select Custom Settings–>Select Network Services–>click on on Details–>Select DNS–>ok

While installing via Active Directory (DCPROMO): (During installation it asks for CD)

Independently: Programs –>Settings –>Control Panel –Add/Remove Programs –>Add/Remove Windows Components –>Select the Network Services–>Click on properties –>Select DNS –>OK (During the installation it asks for CD)

Q13. What Is Caching Only Dns Server?

Just install the DNS carrier into your home windows 2000 server. Then it is called caching only DNS server, as it starts running to your clients to resolve the Internet names to IP address.

When you're installing DNS provider at that point it is preconfigured with root DNS servers IP addresses.

If every person wants to clear up the statistics that belong to your area then you definitely need to configure your DNS server as it should be.

Q14. How To Open Dns?

Start–>Programs–>Administrative Tools–>DNS

Or

Start–>Run–>dnsmgmt.Msc

Or

Start–>Run –>cmd –>dnsmgmt.Msc

Q15. What Is The Difference Between Primary Zone And Secondary Zone?

Primary zone has study and write permissions, while Secondary area has examine handiest permission.

Secondary zone is used for Backup and Load balancing.

Q16. What Is Ptr Record?

PTR record is created in Reverse research quarter. It is the file to primary database for opposite research region purposes (to transform from IP cope with to host names). Each host document in ahead research should have an associated pointer report in reverse research region.

Generally first you will create a Forward lookup sector. Then go for Reverse lookup region. Now we need to create related pointer information for host statistics in ahead lookup region. If you are growing a bunch record in forward research zone after developing reverse research area then here we need no longer to create a pointer document by coming to reverse lookup zone. When creating new host, click on on the take a look at container of create associated pointer document. Then it robotically creates associated pointer report in opposite research region.

Q17. What Type Of Records Do We Find In Dns Database?

The maximum trendy statistics located in DNS database are

Host Record (A report)

Mail Exchange Record (MX document)

Canonical name or CNAME report (CNAME)

Q18. What Is Dynamic Updates In Dns?

Generally we need to create a bunch record for newly joined laptop (either patron or Member server or Domain controller). If you permit dynamic Update alternative, then DNS itself creates related host record for newly joined computer systems.

Q19. What Is The Purpose Of Reverse Lookup Zone?

Reverse lookup resolves the IP addresses to Host names.

Q20. What Is Recursive Query?

Your DNS server requests the basis degree DNS server for specific IP address. Now DNS server says I don’t recognise but I can give the deal with other character who can help you in finding IP deal with.

Q21. When Developing Naming Strategy, Which Dns Server Should We Use?

Microsoft suggests that we use Windows 2000 DNS server. If you need to get a hundred% capability you need to use 2000 DNS server. But you may also use BIND (Berkeley internet name area) DNS servers, but if you need you use with Windows 2000 you must have at the least Bind model 4.9.@(Previous versions don’t support SRV records)

Q22. What Tabs Are There On Properties Of Sever?

Server homes incorporate the subsequent tabs:

Interface

Forwarders

Advanced

Root pointers

Logging

Monitoring

Q23. Suppose The Secondary Zone Is Expired; Now How To Solve The Problem?

First go to number one area check primary area is working or not.

IF primary zone is working then go to secondary quarter, Right click on sector name select the “Transfer from Master” then it robotically contacts the primary DNS, if any updates are there then it takes the updates from the Primary.

Q24. Is There Any Possibility To Have Two Primary Dns Zones?

No, we cannot have  primary DNS zones. Why because if u have  number one DNS zones a few clients contacts first one, some customers contacts second one according to their configuration in TCP/IP houses. Then you will get problems. Actually Primary DNS sector approach Single master. I.E., grasp is most effective one this is simplest one primary DNS area. But you may have as many as Secondary zones.

To overcome from above problem (i.E., unmarried master trouble) in Windows 2000 we've got Active Directory Integrated zones, which are multi masters.

Q25. How To Check Whether Dns Is Working Or Not?

In order to test whether a DNS is working or no longer, type the command “nslookup” in command set off. It will deliver the DNS server call and its IP cope with.

Q26. What Is An Iterative Query?

The query that has been sent to the DNS server from a Client is called iterative query.

(i. E., iterative query is nothing but gives the solution for my query, don’t ask to touch that man or woman or this person or don’t say something else. Simply just answer to my query. That’s all)

Q27. How To Pause The Zone?

Click on the Pause button.

Click on General tab

Go to residences of a quarter

Note: When you put in a Windows 2000 DNS server, you without delay get all of the data of root DNS servers. So every home windows 2000 DNS server established on Internet has pre configured with the address of root DNS servers. So each single DNS server within the Internet can get root servers.

Q28. How To Know Whether The Recent Changes In Primary Zone Are Updated To Secondary Zone Or Not?

Compare the Serial Number on Start of Authority tab in both secondary on primary DNS area houses.

If each are identical then current updates are made to secondary sector.

If not (i.E., secondary is much less then primary) click on “Transfer from Master”

Q29. What Is A Zone?

Also referred to as a sector of authority, region is a subset of the Domain Name System (DNS) namespace this is controlled by a name server. A database of facts is called a region.

Q30. How To Configure The Dns?

Open the DNS Console. Then you may locate there

DNS

Server name

Forward Lookup Zone

Reverse Lookup Zone

Note: If you've got decided on create robotically zones during the setup, then it creates the basis region and domain region below forward research sector. If no zones are there beneath ahead research quarter first create root region then create domain quarter.