DNS Server File Explain Records

DNS ( Domain Name System ) stands for Domain Name System. The main function of DNS is to translate domain names into IP Addresses Whether you’re accessing a website or sending e-mail, your computer uses a DNS server to look up the domain name you’re trying to access website try with an example

What mean Type

• A = associates a name with an IP address
• CNAME = Aliases one name to another name
• NS = mean Name server Name
• SOA = Start of Authority record defining the key characteristics of file zone
• MX = Mail server exchanger
• TXT = text string set
• SRV = specifies the location service
• PTR = PTR records are used for the Reverse DNS (Domain Name System)
• Serial = serial is start any number if the records are upgraded serial number is change

What mean TTL (Time to Live)

Time to live (TTL) or hop limit is a mechanism that limits the lifespan or lifetime of data in a … A TTL value of 86400 would mean that if a DNS record was changed on the authoritative nameserver. Shorter TTLs can cause heavier loads on an authoritative name server, but can be useful when changing the address of critical services like a web server or Mx records and therefore are often lowered by the DNS administrator prior to a service being moved, in order to reduce possible disruptions.

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