附：ping命令帮助说明

　　c:\documents and settings\administrator>ping /

　　usage: ping [-t] [-a] [-n count] [-l size] [-f] [-i ttl] [-v tos]

　　[-r count] [-s count] [[-j host-list] | [-k host-list]]

　　[-w timeout] [-r] [-s srcaddr] [-4] [-6] target_name

　　options:

　　-t ping the specified host until stopped.

　　to see statistics and continue - type control-break;

　　to stop - type control-c.

　　-a resolve addresses to hostnames.

　　-n count number of echo requests to send.

　　-l size send buffer size.

　　-f set don''''t fragment flag in packet (ipv4-only).

　　-i ttl time to live.

　　-v tos type of service (ipv4-only).

　　-r count record route for count hops (ipv4-only).

　　-s count timestamp for count hops (ipv4-only).

　　-j host-list loose source route along host-list (ipv4-only).

　　-k host-list strict source route along host-list (ipv4-only).

　　-w timeout timeout in milliseconds to wait for each reply.

　　-r trace round-trip path (ipv6-only).

　　-s srcaddr source address to use (ipv6-only).

　　-4 force using ipv4.

　　-6 force using ipv6.

　　c:\documents and settings\administrator>