>> hhh:ppp host hhh port ppp >> hhh: host hhh port default-service >> hhh host hhh port default-service >> [hhh]:ppp host hhh port ppp >> [hhh]: host hhh port default-service >> [hhh] host hhh port default-service >> #[hhh:ppp] >> #[hhh:] >> hhh:1pp unknown: warning: garbage after numerical service in hhh:1pp >> [hh.] unknown: warning: valid hostname or network address required in [hh.] >> hh. unknown: warning: valid hostname or network address required in hh. >> 999 unknown: warning: valid hostname or network address required in 999 >> [::1] host ::1 port default-service >> [ipv6:::1] host ::1 port default-service >> [ipv6:127.0.0.1] unknown: warning: malformed IPv6 address in [ipv6:127.0.0.1] >> [ipv6:example.com] unknown: warning: malformed IPv6 address in [ipv6:example.com]