WKS--Well-Known Services

WKS--Well-Known Services

{name} {ttl} addr-class WKS address      protocol services list 
             IN         WKS 192.12.6.16  UDP   (who route
                                               timed domain)
             IN         WKS 192.12.63.16 TCP   (echo telnet
                                               chargen ftp
                                               smtp time
                                               domain bootp
                                               finger sunrpc)

The Well-Known Services record, WKS, describes well-known services supported by a particular protocol at a specified address. The list of services and port numbers comes from the list of services specified in /etc/services. There should be only one WKS record per protocol per address.