| Protoent | Defines
the protocol Name-to-Number mapping. The protocol entry is represented
by ($name, $aliases, $proto). |
| hostent | Defines
the Internet host Name-to-Address mapping. The host entry is represented
by ($name, $aliases, $addrtype, $length,
@addrs) where @addrs is a list of raw addresses. |
| netent | Defines
the Network Name-to-Network Number mapping. The net entry is represented
by ($name, $aliases, $addrtype, $net). |
| servent | Maps
service names to port numbers. The service entry is represented
by ($name, $%aliases, $port, $proto). |