Under Windows Ping instructions, I have been familiar with it, but people who can play ping to the greatest, but I don't say that I can let Ping play the biggest function, I am only used frequently. Ping this tool, also summarizes some little experience, now share it with you.
Now I will refer to the auxiliary instructions for the Ping instruction to tell you how I use ping, and ping can only use the TCP / IP Communication protocol.
Ping [-t] [-a] [-n count] [-l length] [-f] [-i ttl] [-V TOS] [-r count] [-s count] [[-j computer-list ] | [-k computer-list] [-w timeout] destination-list
Options:
-t ping the specified host uncle stopped.to see statistics and continue - Type Control-Break; to Stop - Type Control-C.
Keep Ping Local Host until you press Control-C.
This feature? What special skills can be used in conjunction with other parameters, will be mentioned below.
-a resolve addresss to hostnames.
Analyze computer NetBIOS name.
Example: C: \> ping -a 192.168.1.21
Pinging Iceblood.yofor.com [192.168.1.21] with 32 bytes of data:
Reply from 192.168.1.21: Bytes = 32 TIME <10MS TTL = 254
Reply from 192.168.1.21: Bytes = 32 TIME <10MS TTL = 254
Reply from 192.168.1.21: Bytes = 32 TIME <10MS TTL = 254
Reply from 192.168.1.21: Bytes = 32 TIME <10MS TTL = 254
Ping Statistics for 192.168.1.21:
Packets: SENT = 4, Received = 4, Lost = 0 (0% Loss), Approximate Round Trip Times in Milli-Seconds:
Minimum = 0ms, maximum = 0ms, Average = 0ms
From the above, you can know the computer NetBIOS named Iceblood.Yofor.com with IP 192.168.1.21.
--N Count Number of echo requests to send.
Send count of the ECHO packet specified by COUNT.
By default, only four packets are usually sent. You can define the number of sent by this command. It is very helpful to measure the network speed. For example, I want to test the average time of the return of 50 packets, how much time is How much is the fastest time, the slowest time can pass the following? Know:
C: \> ping -n 50 202.103.96.68
Pinging 202.103.96.68 with 32 bytes of data:
Reply from 202.103.96.68: Bytes = 32 TIME = 50ms TTL = 241
Reply from 202.103.96.68: Bytes = 32 TIME = 50ms TTL = 241
Reply from 202.103.96.68: Bytes = 32 Time = 50ms TTL = 241REQUEST TIMED OUT.
..................
Reply from 202.103.96.68: Bytes = 32 TIME = 50ms TTL = 241
Reply from 202.103.96.68: Bytes = 32 TIME = 50ms TTL = 241
Ping statistics for 202.103.96.68:
Packets: SENT = 50, Received = 48, Lost = 2 (4% Loss), Approximate Round Trip Times in Milli-Seconds:
Minimum = 40ms, maximum = 51ms, Average = 46ms
From the above, I can know that in the process of sending 50 packets to 202.103.96.68, it returns 48, two of which are lost due to unknown reasons, the 48 packets return speed is the fastest 40MS, the slowest 51MS, the average speed is 46ms.
-l size send buffer size.
Define the ECHO packet size.
In the default situation? The packet size sent by Windows is 32Byt, we can also define its size, but there is a size limit, that is, the maximum can only send 65500BYT, maybe someone will ask why it is limited to 65500Byt, Because the system of the Windows series has a security vulnerability (perhaps other systems) is that when the data package sent by the other party is greater than or equal to 65532, the other party is very likely to be machine, so Microsoft has solved this security vulnerability. Limits ping packet size. Although Microsoft has made this limit, this parameter is still very powerful after the parameters, such as we can implement an aggressive instruction by mating -t parameters: (The following introduction is dangerous, only In the test, do not apply to someone in the computer, no? Concert
C: \> ping -l 65500 -t 192.168.1.21
Pinging 192.168.1.21 with 65500 BYTES of DATA:
Reply from 192.168.1.21: Bytes = 65500 Time <10ms TTL = 254
Reply from 192.168.1.21: Bytes = 65500 Time <10ms TTL = 254
..................
This will send a size of 65500BYT to 192.168.1.21, if you have only one computer, but if you have a lot of computers, you can make the other party completely paralyzed, I used to do it. In this trial, when I use more than 10 computer PING PING PING a WIN2000PRO system, less than 5 minutes, the network has been completely paralyzed, the network is seriously blocked, the HTTP and FTP services are completely stopped, thereby visible that the power is not small .
-f set don't fragment flag in packet.
Send a "Do not segment" flag in the packet.
In the general packet you send, you will be sent to the other party via routing segmentation, plus the route will not reside again.
-i TTL TIME TO LIVE.
Specifies the time to stay in the system in the other party.
This parameter also helps you check the network operation.
-V TOS TYPE OF Service.
Set the Service Type field to the value specified by TOS.
-r Count Record Route for Count HOPS.
Record the routing of the packet in the Record Routing field. In general, the packet you sent is to the other party through a route, but what is the route? With this parameter, you can set the number of routes that you want to detect, but the limit is 9, that is, you can only track 9 routes. If you want to detect more, you can implement it through other commands, I will Explain to everyone in future articles. The following is an example:
C: \> ping -n 1 -r 9 202.96.105.101 (send a packet, record up to 9 routing)
Pinging 202.96.105.101 with 32 bytes of data:
Reply from 202.96.105.101: bytes = 32 TIME = 10ms TTL = 249
Route: 202.107.208.187 ->
202.107.210.214 ->
61.153.112.70 ->
61.153.112.89 ->
202.96.105.149 ->
202.96.105.97 ->
202.96.105.101 ->
202.96.105.150 ->
61.153.112.90
Ping statistics for 202.96.105.101:
Packets: SENT = 1, Received = 1, Lost = 0 (0% LOSS),
Approximate Round Trip Times in Milli-Seconds:
Minimum = 10ms, maximum = 10ms, Average = 10ms
From above I can know that from my computer to 202.96.105.101, I passed 202.107.214, 61.2.107.210, 6153.112.89, 202.96.105.149, 202.96.105.97 These routes.
-s Count Timestamp for Count HOPS.
Specifies the timestamp of the number of points specified by count.
This parameter and -R are similar, but this parameter does not record the route passed by the packet, and only 4 is recorded.
-j host-list loose source route along host-list.
Routing the packet using the computer list specified using computer-list. The continuous computer can be intermediate-off network? Separate (routing sparse source) IP allowed to 9.
-k Host-List strict source route along host-list.
Routing the packet using the computer list specified using computer-list. The continuous computer cannot be subject to the middle network? Separate (routing grid source) IP allowed to be 9.
-w Timeout Timeout in MilliseConds to wait for each reply.
Specifies a timeshoot, unit is millisecond.
This parameter? What other techniques are available.
Other techniques for the Ping Directive: In general, the other party can return to your TTL value size, rough judgment target host's system type is the Windows series or the Unix / Linux series, in general, WINDOWS series? The returned TTL value is between 100-130, and the TTL value returned by the UNIX / Linux series is between 240-255, and of course the value of TTL can be modified in the other's host, the WINDOWS series? Can pass Modify note? Table The following key value is implemented:
[HKEY_LOCAL_MACHINE \System \CurrentControlset \Services\tcpip \parameters]
"Defaultttl" = dword: 000000FF255 --- FF
128 --- 80
64 ---- 40
32 ---- 20
Ok, the ping command is basically completely explained, and there are -J, -K parameters I have not explained in detail, because some reasons also include the information I have collected too much? Have a detailed introduction, Please forgive me, if you have a friend who knows more than me, and other skills, you can tell me, and thank you here.
