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Switches may be preset in the DIRCMD environment variable. Override\r\npreset switches by prefixing any switch with - (hyphen)--for example, /-W.\r\n\r\nC:\\>ping /?\r\n\r\nUsage: ping [-t] [-a] [-n count] [-l size] [-f] [-i TTL] [-v TOS]\r\n [-r count] [-s count] [[-j host-list] | [-k host-list]]\r\n [-w timeout] destination-list\r\n\r\nOptions:\r\n -t Ping the specified host until stopped.\r\n To see statistics and continue - type Control-Break;\r\n To stop - type Control-C.\r\n -a Resolve addresses to hostnames.\r\n -n count Number of echo requests to send.\r\n -l size Send buffer size.\r\n -f Set Don\'t Fragment flag in packet.\r\n -i TTL Time To Live.\r\n -v TOS Type Of Service.\r\n -r count Record route for count hops.\r\n -s count Timestamp for count hops.\r\n -j host-list Loose source route along host-list.\r\n -k host-list Strict source route along host-list.\r\n -w timeout Timeout in milliseconds to wait for each reply.\r\n\r\n/ 后,一般就是选项,\r\n- 后,常会带有数值的参数, |
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