1>> hhh:ppp 2host hhh port ppp 3>> hhh: 4host hhh port default-service 5>> hhh 6host hhh port default-service 7>> [hhh]:ppp 8host hhh port ppp 9>> [hhh]: 10host hhh port default-service 11>> [hhh] 12host hhh port default-service 13>> #[hhh:ppp] 14>> #[hhh:] 15>> hhh:1pp 16unknown: warning: garbage after numerical service in hhh:1pp 17>> [hh.] 18unknown: warning: valid hostname or network address required in [hh.] 19>> hh. 20unknown: warning: valid hostname or network address required in hh. 21>> 999 22unknown: warning: valid hostname or network address required in 999 23>> [::1] 24host ::1 port default-service 25>> [ipv6:::1] 26host ::1 port default-service 27>> [ipv6:127.0.0.1] 28unknown: warning: malformed IPv6 address in [ipv6:127.0.0.1] 29>> [ipv6:example.com] 30unknown: warning: malformed IPv6 address in [ipv6:example.com] 31