About Narayana Charan Expertise I can answer questions for Windows 98,2000,XP,2000 Server,2003 Server, Exchange 2003, Exchange 2007, DNS Servers, IIS, DHCP and WINS. Apart from these i have good knowledge in Windows 2003 Active Directory Management, Sites and Services, Recovery Solutions, Anti virus issues, Backup related, Trust Relation Ships, Permissions and security related, FMSO Roles, Global Catalog Server related, Preparation of AD for Exchange Installation, Domain and Forest management, Infrastructure Management, Outlook and Questions related to Routing and Connection issues etc. you can feel free ask me in these areas at any time. I hope i can perform better solve your problems.
Experience I have a total of 5 years of Experience in this area.
Question what is DNS stub done??what is use of that??how it works??
Answer Dear Ram,
how are you doing? Stub Zone. It contains only some records. Records like SOA,SRV, NS, MX etc. Primary zone means it contains all the records with read and write permissions. Secondary zone means, it is a backup of primary zone and is with read-only permissions. And these two zones contains all the records which are basically present in a typical DNS server. But stub zone is different from these two types. It is also read-only zone with only important record types. I am going to describe you about stub zone here.
A stub zone is a read-only copy of a zone, which obtains its resource records from other name servers. It contains copies of only three types of resource records:
1. SOA record for the zone.
2. Name server (NS) records for all name servers authoritative for the zone.
3. Host (A) records for all name servers authoritative for the zone.
These resource records are necessary to identify the authoritative DNS server for the zone. A stub zone is used to streamline name resolution, especially in a split namespace scenario.
A DNS server that is hosting a stub zone is configured with the IP address of the authoritative server from which it loads. DNS servers can use stub zones for both iterative and recursive queries. When a DNS server hosting a stub zone receives a recursive query for a computer name in the zone to which the stub zone refers, the DNS server uses the IP address to query the authoritative server, or, if the query is iterative, returns a referral to the DNS servers listed in the stub zone. A stub zone reduces the amount of DNS traffic on the network and makes DNS more efficient especially over slow WAN links.
I hope this is informative for you. I would like to thank you for asking me this question.
