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| − | + | Any domain name has a DNS zone that consists of the following records: | |
'''A Record'''- specifies IP addresses corresponding to your domain and its subdomains; '''CNAME record''' - specifies redirects from your domain's subdomains to other domains / subdomains; '''MX record''' - specifies the mail server the emails for your domain should be delivered to; '''NS record''' - specifies the domain nameservers; '''SOA Record''' - Start of Authority record. It is the first entry in the zone file; '''PTR Record''' - Reverse pointer record. '''SPF Record'''- Sender Policy Framework (SPF) is an attempt to control forged e-mail. | '''A Record'''- specifies IP addresses corresponding to your domain and its subdomains; '''CNAME record''' - specifies redirects from your domain's subdomains to other domains / subdomains; '''MX record''' - specifies the mail server the emails for your domain should be delivered to; '''NS record''' - specifies the domain nameservers; '''SOA Record''' - Start of Authority record. It is the first entry in the zone file; '''PTR Record''' - Reverse pointer record. '''SPF Record'''- Sender Policy Framework (SPF) is an attempt to control forged e-mail. | ||
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<center>'''NS Record'''</center> | <center>'''NS Record'''</center> | ||
| − | Name server records allow you to identify the authoritative servers for this zone. NS records | + | Name server records allow you to identify the authoritative servers for this zone. Each domain must have NS records as without them, the servers for a domain would be unknown. |
<center>'''SOA Record'''</center> | <center>'''SOA Record'''</center> | ||
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The first entry in each of the zone files is the Start of Authority (SOA) resource record. The SOA record indicates the authoritative name server for this domain. Since the SOA record marks the beginning of a zone, there can be only one for each zone. | The first entry in each of the zone files is the Start of Authority (SOA) resource record. The SOA record indicates the authoritative name server for this domain. Since the SOA record marks the beginning of a zone, there can be only one for each zone. | ||
| − | The SOA record stores information | + | The SOA record stores the following information: |
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| + | the name of the server supplying the data for the zone; | ||
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| + | the zone administrator; | ||
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| + | the current version of the data file; | ||
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| + | the number of seconds a secondary name server should wait before checking for updates; | ||
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| + | the number of seconds a secondary name server should wait before retrying a failed zone transfer, etc. | ||
<center>'''SPF Record'''</center> | <center>'''SPF Record'''</center> | ||
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