Ask for some simple and practical ways to use ping

1 When you can't access the Internet, you can choose to ping your own IP, if it is through, it means that the network card is fine; Ping the external network, if it is not connected, it means that there is a problem between the NIC and the external network, please check

2 There are many reasons for slow Internet access, but the main reason in China is that the gateway of the two telecom operators is too small, to put it bluntly, if you use the network of telecommunications, the Internet must be slow, and vice versa; You can ping ** to see if the IP is **, which is determined according to the time value of the reversal

3 From the value returned, the number of bytes is 32 (the smallest value used for the test network, if this number is the largest, it will occupy your own bandwidth, if the opponent's machine is almost there, you can ping the opponent's machine to death, because it is garbage data and has no practical use) The response time is less than 10 milliseconds (a value for testing the network connection speed) The system returns a value of 254 (most of this thing is a value for a system).

Hehe, I want to write less, but I'm afraid you won't understand, so I wrote so much before I knew it, I hope it will help you.

What are you trying to do? Want to ping a denial-of-service attack? Stop that thought.

The word ping is often heard, and it is used to check whether a computer is a command on the Internet. Run cmd to enter the command prompt state, and after the prompt, enter the IP address or computer name of a certain computer. For example:

Ping or ping lenovo, press enter to get a response from the other computer, if the request time is out, it means that the other computer is not turned on or has a fire wall installed.

The ping command is a program used to test the network connection, and its corresponding file name is ". Depending on the purpose of the test, this command can carry different parameters.

The number of bytes sent is too large. The default value is 64 bytes and the maximum value is 8192 bytes.

ping -c 1 -s 65535

Hehe, do you want to do it? Want to ping o'death?

The command was not used wrong. It's because the envelope is too big. The network card can't stand it.

-s count timestamp for count hops.

Specify the count timestamp for the specified number of hops.

This parameter is similar to -r, except that it does not record the route through which the packet is returned, and only records a maximum of 4 routes.

j host-list loose source route along host-list.

Packets are routed using the list of computers specified by computer-list. The maximum number of contiguous computers that can be separated by an intermediate gateway (routing sparse sources) is 9.

k host-list strict source route along host-list.

Packets are routed using the list of computers specified by computer-list. Contiguous computers cannot be separated by an intermediate gateway (routing strict source) The maximum number of IPs allowed is 9.

w timeout timeout in milliseconds to wait for each reply.

Specifies the timeout interval in milliseconds.

There is no other trick to this parameter.

Other tips of ping command: In general, you can also ping the other party to let the other party return the TTL value to you, roughly determine whether the system type of the target host is Windows series or Unix Linux series, under normal circumstances, the TTL value returned by the Windows series system is between 100-130, and the TTL value returned by the Unix Linux series system is between 240-255. Of course, the value of TTL can be modified in the other host, and the Windows series system can be achieved by modifying the following key value of the registry

defaultttl"=dword:000000ff

255---ff

A complete list of how to use the ping command.

When you ping a domain name for the first time, after the computer issues a command, the router will automatically check whether the DNS you set exists, and then send the corresponding data packet, and when your DNS is the same as the DNS in the router, the router will omit this step and send the data packet directly. Of course, this will not be the case when you visit again, and this is when the speed is real.

This is not the case with a ping IP because it does not go through DNS.

The above is just my personal opinion.

I use a router to surf the Internet,And then manually changed the DNS server of my machine,DNS server is the default of Netcom,The web page can be accessed normally,But when the ping command is executed, it will be stuck and the result will be returned,Then ping the same address is normal,If you change the address ping or the first time it will be stuck,The back will be normal (this causes every time you access a ** when you get stuck for the first time,Re-access is normal),If you ping directly This phenomenon does not exist with IP.

echo?off:loopping???

echo?Your trembling network has been skinned back to at"%time%"?echo?

Ping before burning the hole?fail?at?

time%"goto?:looppause