Simply put, TTL's full time to Live means the survival cycle.
The following are reference materials.
Ping is a very commonly used gadget, which is mainly used to determine network connectivity issues. After using the ping command, common error messages are usually divided into three types:
1. Unknown host: The error message of an unknown host means that the name of the remote host cannot be converted into an IP address by the domain name server (DNS).
The cause of the failure may be a faulty domain name server, or its name is incorrect, or the communication line between the network administrator's system and the remote host is faulty. fly
2. Noanswer: No response to this failure indicates that the local system has a route to the central host, but it cannot receive any letters it sends to the central host.
interest. The cause of the failure may be one of the following: the central host is not working; the local or central host network configuration is incorrect: the local or central router does not; 1:::
The communication line is faulty; the central host has routing problems. 1
3. Request timbd out: The connection between the workstation and the central host timed out, and all packets were lost of the reason: It may be that the connection to the router appears
The problem, or the router cannot pass, it may be that the central host has been shut down or crashed.
How to use the ping command to find the reason why you can't access the Internet?
1. The syntax format of the Ping command:
It is necessary to first introduce the specific syntax format of the Ping command to those who do not understand the Ping command: ping destination address [parameter 1J [parameter 2]...
The destination address refers to the IP address or domain name of the computer being tested. The main parameters are:
a: Resolve the host address.
n: Data: The number of test packets issued, the default value is 4.
l: Value: the size of the sent buffer.
t: Continue to execute the Ping command until the user presses Ctrl/C to finish.
For other parameters about hng, you can view it by running the Ping or Ping-? command at the MS-DOS prompt.
2. Application skills of hng command:
When using Ping::[: to check the TCP/IP protocol on the network server and any client, just ping on any other computer in the network.
The IP address of the computer is enough. For example, you need to check the TCP/IP protocol 2 on the network file server 192.192.225.225 HPQW [: Is it normal? As long as it is in
Type Ping 192.192.225.225 in the "Run" subitem under the Start menu. If HPQW's TCP/IP protocol: [: Normal, it will use DOS
The screen displays the following information:
Pinging 192．192．225．225 with 32 byteS of dara：
Reply from 192.192.225, 225: bytes=32 time=lms TTL 2128
Reply from 192．192，225．225：bytes=32 time<1mS TTL=128
Reply from 192．192．225．225：byteS'32 timeReply from 192．192．225．225：byteS‘32 timePing StatiStiCe for 192．192．225．225：
PacketS: Sent 24, ReceiVed 24, LOSt 20 (0% lOSS)
Approximate round trip timeS in milli-secondS：
Minimum=Oms，Maximum=1mS，Average=OmS
The above returns 4 test packets, where bytes=32 means that the packet size sent in the test is 32 bytes, "me<10ms means that it is with the other host.
The time spent on a round trip is less than 10 milliseconds. TTL=128 means that the TTL (Time to Live) value used by the current test is 128 (system default value).
If there is a problem with the network, the response failure information shown below is returned:
Pinging 192．192，225．225 with 32 bytes of data
RequeSt timed out．
RequeSt timed out．
RequeSt timed OUt．
RequeSt timed out．
Ping StatiStiCe for 192．192．225，225：
PacketS: Sent=4, ReceiVed 20, LOSt ＼ 2 4 (100% lOSS)
Minimum‘0ms，Maximum=OmS，Average'0mS
Network failure: When a second situation occurs, it is recommended to start from the above aspects: First, see if the computer being tested has TCP/IP protocol installed:
The second is to check whether the network card of the tested computer is installed correctly and whether it is connected: the third is to check whether the TCP/IP protocol of the tested computer is connected with the network F
Effective binding (the specific method is to check it by selecting "Start one settings, one control panel, one network"): If the above steps have not been checked yet
If you find the crux of the problem, it is recommended to reinstall and set up a 'factory TCP/' protocol. If it is a problem with the TCP/IP protocol, it can definitely be completely solved at this time.
According to the above method, we can also use the Ping command to check the working status of TCP/IP on any customer computer. For example, we need to check the Internet
The following are reference materials.
Ping is a very commonly used gadget, which is mainly used to determine network connectivity issues. After using the ping command, common error messages are usually divided into three types:
1. Unknown host: The error message of an unknown host means that the name of the remote host cannot be converted into an IP address by the domain name server (DNS).
The cause of the failure may be a faulty domain name server, or its name is incorrect, or the communication line between the network administrator's system and the remote host is faulty. fly
2. Noanswer: No response to this failure indicates that the local system has a route to the central host, but it cannot receive any letters it sends to the central host.
interest. The cause of the failure may be one of the following: the central host is not working; the local or central host network configuration is incorrect: the local or central router does not; 1:::
The communication line is faulty; the central host has routing problems. 1
3. Request timbd out: The connection between the workstation and the central host timed out, and all packets were lost of the reason: It may be that the connection to the router appears
The problem, or the router cannot pass, it may be that the central host has been shut down or crashed.
How to use the ping command to find the reason why you can't access the Internet?
1. The syntax format of the Ping command:
It is necessary to first introduce the specific syntax format of the Ping command to those who do not understand the Ping command: ping destination address [parameter 1J [parameter 2]...
The destination address refers to the IP address or domain name of the computer being tested. The main parameters are:
a: Resolve the host address.
n: Data: The number of test packets issued, the default value is 4.
l: Value: the size of the sent buffer.
t: Continue to execute the Ping command until the user presses Ctrl/C to finish.
For other parameters about hng, you can view it by running the Ping or Ping-? command at the MS-DOS prompt.
2. Application skills of hng command:
When using Ping::[: to check the TCP/IP protocol on the network server and any client, just ping on any other computer in the network.
The IP address of the computer is enough. For example, you need to check the TCP/IP protocol 2 on the network file server 192.192.225.225 HPQW [: Is it normal? As long as it is in
Type Ping 192.192.225.225 in the "Run" subitem under the Start menu. If HPQW's TCP/IP protocol: [: Normal, it will use DOS
The screen displays the following information:
Pinging 192．192．225．225 with 32 byteS of dara：
Reply from 192.192.225, 225: bytes=32 time=lms TTL 2128
Reply from 192．192，225．225：bytes=32 time<1mS TTL=128
Reply from 192．192．225．225：byteS'32 timeReply from 192．192．225．225：byteS‘32 timePing StatiStiCe for 192．192．225．225：
PacketS: Sent 24, ReceiVed 24, LOSt 20 (0% lOSS)
Approximate round trip timeS in milli-secondS：
Minimum=Oms，Maximum=1mS，Average=OmS
The above returns 4 test packets, where bytes=32 means that the packet size sent in the test is 32 bytes, "me<10ms means that it is with the other host.
The time spent on a round trip is less than 10 milliseconds. TTL=128 means that the TTL (Time to Live) value used by the current test is 128 (system default value).
If there is a problem with the network, the response failure information shown below is returned:
Pinging 192．192，225．225 with 32 bytes of data
RequeSt timed out．
RequeSt timed out．
RequeSt timed OUt．
RequeSt timed out．
Ping StatiStiCe for 192．192．225，225：
PacketS: Sent=4, ReceiVed 20, LOSt ＼ 2 4 (100% lOSS)
Minimum‘0ms，Maximum=OmS，Average'0mS
Network failure: When a second situation occurs, it is recommended to start from the above aspects: First, see if the computer being tested has TCP/IP protocol installed:
The second is to check whether the network card of the tested computer is installed correctly and whether it is connected: the third is to check whether the TCP/IP protocol of the tested computer is connected with the network F
Effective binding (the specific method is to check it by selecting "Start one settings, one control panel, one network"): If the above steps have not been checked yet
If you find the crux of the problem, it is recommended to reinstall and set up a 'factory TCP/' protocol. If it is a problem with the TCP/IP protocol, it can definitely be completely solved at this time.
According to the above method, we can also use the Ping command to check the working status of TCP/IP on any customer computer. For example, we need to check the Internet
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