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Which record is the first record created for a zone on a DNS Server?
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∙ 12y ago
Start of Authority (SOA) is the first record in the zone file. It contains the name of the primary DNS Server, which must correspond to an Name Server (NS) record in the file, the administrator's e-mail address and the length of time records can be cached before going back to the authoritative DNS server.
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∙ 12y ago
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What DNS resource record type identifies the resource authoritative name server?
SOA Resource Records Every zone contains a Start of Authority (SOA) resource record at the beginning of the zone. SOA resource records include the following fields: * The Owner , TTL , Class , and Type fields, as described in "Resource Record Format" earlier in this chapter. * The authoritative server field shows the primary DNS server authoritative for the zone. * The responsible person field shows the e-mail address of the administrator responsible for the zone. It uses a period (.) instead of an at symbol (@). * The serial number field shows how many times the zone has been updated. When a zone's secondary server contacts the master server for that zone to determine whether it needs to initiate a zone transfer, the zone's secondary server compares its own serial number with that of the master. If the serial number of the master is higher, the secondary server initiates a zone transfer. * The refresh field shows how often the secondary server for the zone checks to see whether the zone has been changed. * The retry field shows how long after sending a zone transfer request the secondary server for the zone waits for a response from the master server before retrying. * The expire field shows how long after the previous zone transfer the secondary server for the zone continues to respond to queries for the zone before discarding its own zone as invalid. * The minimum TTL field applies to all the resource records in the zone whenever a time to live value is not specified in a resource record. Whenever a resolver queries the server, the server sends back resource records along with the minimum time to live. Negative responses are cached for the minimum TTL of the SOA resource record of the authoritative zone.
What is soa in active directory?
SOA Resource Records Every zone contains a Start of Authority (SOA) resource record at the beginning of the zone. SOA resource records include the following fields: * The Owner , TTL , Class , and Type fields, as described in "Resource Record Format" earlier in this chapter. * The authoritative server field shows the primary DNS server authoritative for the zone. * The responsible person field shows the e-mail address of the administrator responsible for the zone. It uses a period (.) instead of an at symbol (@). * The serial number field shows how many times the zone has been updated. When a zone's secondary server contacts the master server for that zone to determine whether it needs to initiate a zone transfer, the zone's secondary server compares its own serial number with that of the master. If the serial number of the master is higher, the secondary server initiates a zone transfer. * The refresh field shows how often the secondary server for the zone checks to see whether the zone has been changed. * The retry field shows how long after sending a zone transfer request the secondary server for the zone waits for a response from the master server before retrying. * The expire field shows how long after the previous zone transfer the secondary server for the zone continues to respond to queries for the zone before discarding its own zone as invalid. * The minimum TTL field applies to all the resource records in the zone whenever a time to live value is not specified in a resource record. Whenever a resolver queries the server, the server sends back resource records along with the minimum time to live. Negative responses are cached for the minimum TTL of the SOA resource record of the authoritative zone.
What is the DNS server in which changes are made for a particular zone and then propagated to other DNS servers?
The prefered DNS server for the site is the server which sends the dns zone updates to all the other servers in the site. The primary DNS zone is created on the server and it has the authority to send changes in zone to other servers
What is stubzone?
Stub zones are copies of a zone that contain only the resource records that are necessary to identify the authoritative DNS server for that zone. A stub zone contains a subset of zone data consisting of a SOA, NS, and A record, also known as a glue record. A stub zone is like a bookmark that simply points to the DNS server that is authoritative for that zone. Stub zones can be used where root hints point to an internal DNS server rather than to the root servers on the Internet. For security purposes, the DNS server is designed only to resolve certain zones. Thaslim thaslimca007@gmail.com
What is secondary zone in active directory?
Secondary zone When a zone that this DNS server hosts is a secondary zone, this DNS server is a secondary source for information about this zone. The zone at this server must be obtained from another remote DNS server computer that also hosts the zone. This DNS server must have network access to the remote DNS server that supplies this server with updated information about the zone. Because a secondary zone is merely a copy of a primary zone that is hosted on another server, it cannot be stored in AD DS.
DNS record types describe the most important ones?
Type of Record What it doesA (Host) Classic resource record. Maps hostname to IP(ipv4) PTR Maps IP to hostname (Reverse of A (Host) AAAA Maps hostname to ip (ipv6) Cname Canonical name, in plain English an alias.such asWeb Server,FTP Server, Chat Server NS Identifies DNS name servers. Important for forwarders MX Mail servers, particularly for other domains.MX records required to deliver internet email. _SRV Required for Active Directory. Whole family ofunderscore service,records, for example, gc = global catalog.SOA Make a point of finding the Start of Authority (SOA) tab at the DNS Server. For more knowledge Srv records :- A SRV or Service Record is a category of data in the DNS specifying information on available services. When looking up for a service, you must first lookup the SRV Record for the service to see which server actually handles it. Then it looks up the Address Record for the server to connect to its IP Address. Authoritative Name Server [NS] Record :-A Zone should contain one NS Record for each of its own DNS servers (primary and secondary). This mostly is used for Zone Transfer purposes (notify). These NS Records have the same name as the Zone in which they are located. SOA :-This record is used while syncronising data between multiple computers.A given zone must have precisely one SOA record which contains Name of Primary DNS Server,Mailbox of the Responsible Person,Serial Number: Used by Secondary DNS Servers to check if the Zone has changed. If the Serial Number is higher than what the Secondary Server has, a Zone Transfer will be initiated,Refresh Interval: How often Secondary DNS Servers should check if changes are made to the zone,Retry Interval: How often Secondary DNS Server should retry checking, if changes are made - if the first refresh fails,Expire Interval: How long the Zone will be valid after a refresh. Secondary Servers will discard the Zone if no refresh could be made within this interval.Minimum (Default) TTL: Used as the default TTL for new Records created within the zone. Also used by other DNS Server to cache negative responses (such as Record does not exist, etc.).regards krushna_sa@yahoo.com
What is SOA records?
A start of authority (SOA) record is information stored in a domain name system (DNS) zone about that zone and about other DNS records. A DNS zone is the part of a domain for which an individual DNS server is responsible. Each zone contains a single SOA record. SOA records are defined in IETF RFC 1035, Domain Names - Implementation and Specification. The SOA record stores information about the name of the server that supplied the data for the zone; the administrator of the zone; the current version of the data file; the number of seconds a secondary name server should wait before checking for updates; the number of seconds a secondary name server should wait before retrying a failed zone transfer; the maximum number of seconds that a secondary name server can use data before it must either be refreshed or expire; and a default number of seconds for the time-to-live file on resource records.
What is a SOA record?
A start of authority (SOA) record is information stored in a domain name system (DNS) zone about that zone and about other DNS records. A DNS zone is the part of a domain for which an individual DNS server is responsible. Each zone contains a single SOA record. SOA records are defined in IETF RFC 1035, What_is_SOA_records- Implementation and Specification.Read more: What_is_SOA_recordsAnil Bankey
What will transfer all records within a zone from a primary server to a secondary server?
zone transfer
What is the difference between an SOA and a NS record in DNS?
SOA 6 RFC 1035 Start of Authority. Defines the zone name, an e-mail contact and various time and refresh values applicable to the zone. NS 2 RFC 1035 Name Server. Defines the authoritative name server(s) for the domain (defined by the SOA record) or the subdomain.
What are the types of DNS zones in windows server 2003?
Primary zoneWhen a zone that this DNS server hosts is a primary zone, the DNS server is the primary source for information about this zone, and it stores the master copy of zone data in a local file or in AD DS. When the zone is stored in a file, by default the primary zone file is named zone_name.dns and it is located in the %windir%\System32\Dns folder on the server.Secondary zoneWhen a zone that this DNS server hosts is a secondary zone, this DNS server is a secondary source for information about this zone. The zone at this server must be obtained from another remote DNS server computer that also hosts the zone. This DNS server must have network access to the remote DNS server that supplies this server with updated information about the zone. Because a secondary zone is merely a copy of a primary zone that is hosted on another server, it cannot be stored in AD DS.Stub zoneWhen a zone that this DNS server hosts is a stub zone, this DNS server is a source only for information about the authoritative name servers for this zone. The zone at this server must be obtained from another DNS server that hosts the zone. This DNS server must have network access to the remote DNS server to copy the authoritative name server information about the zone.You can use stub zones to:Keep delegated zone information current. By updating a stub zone for one of its child zones regularly, the DNS server that hosts both the parent zone and the stub zone will maintain a current list of authoritative DNS servers for the child zone.Improve name resolution. Stub zones enable a DNS server to perform recursion using the stub zone's list of name servers, without having to query the Internet or an internal root server for the DNS namespace.Simplify DNS administration. By using stub zones throughout your DNS infrastructure, you can distribute a list of the authoritative DNS servers for a zone without using secondary zones. However, stub zones do not serve the same purpose as secondary zones, and they are not an alternative for enhancing redundancy and load sharing.There are two lists of DNS servers involved in the loading and maintenance of a stub zone:The list of master servers from which the DNS server loads and updates a stub zone. A master server may be a primary or secondary DNS server for the zone. In both cases, it will have a complete list of the DNS servers for the zone.The list of the authoritative DNS servers for a zone. This list is contained in the stub zone using name server (NS) resource records.When a DNS server loads a stub zone, such as abc.xyz.com, it queries the master servers, which can be in different locations, for the necessary resource records of the authoritative servers for the zone abc.xyz.com. The list of master servers may contain a single server or multiple servers, and it can be changed anytime.
What is a C name record in DNS?
Sometimes it is useful to be able to access a server (or any host) by using a name other than its DNS host name. For example, you have an Application Server whose DNS configuration is as follows: Host Name Domain Name --------- ------------- myserver mydomain.com You have also setup your server as a WWW server so Internet or Intranet browsers can access Web pages from it. You want people to access your Web server by specifying www.mydomain.com as its name instead of myserver.mydomain.com. To accomplish this, an alias (or canonical name) record needs to be added to your DNS server. The DNS server should already have the following record under the mydomain.com zone (IPAddress should be the IP address of your server): Myserver A <IPAddress> The following record should be added to the mydomain.com zone: www CNAME myserver.mydomain.com When a DNS server looks up a name and finds a "CNAME" record, it replaces the name with the canonical name, and looks up the new name, in this case, www.mydomain.com.
