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domain name system

Linux / Unix: Dig Command Find Out TTL (Time to Live) Value For DNS Records

I would like to see the Time-to-live (TTL) value for a 'AAAA' and A record for domains. How do I see Time-to-live (TTL) for a DNS record under Unix or Linux operating systems using command line options?
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HowTo: Find Out DNS Server IP Address Used By My Router?

My router configured by ISP tech and it is set to get DNS server address automatically from upstream. Is there is a way to find out the IP address of the dns server used by my router which is located at Is there Linux, Unix, Apple OS X, or MS-Windows command that I can use get the same information?
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HowTo: Ping IPv6 Address Using Windows Vista / Xp or Windows Server 2008 / 2003 Server

How do I ping IPv6 enabled address using Windows XP or Vista or Windows ME/Server edition?
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How To Find Out What My DNS Servers Address Is

How do I find out my DNS server addresses under Linux, UNIX, Apple OS X, MS-Windows operating system? What is my dns server IP address under MS-Windows operating systems? Can you specify a list of public DNS server for personal use or game consoles?
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