Knowledge focus: Ping does not make sense because this is mainly the top ten in the external network address when Ping appear. Because when the gateway setting error, Ping packets sent by the gateway can not be forwarded. Therefore, the gateway to check the machine settings and the remote gateway is configured correctly. ..
Ping does not make sense for a top ten reasons
This occurred mainly in the Ping appear when the external network address. Because when the gateway setting error, Ping packets sent by the gateway can not be forwarded. Therefore, the gateway to check the machine settings and the remote gateway is configured correctly.
Generally,
nba shoes, only the exclusion of the above reasons, to be able to under the
Second, Destination Host Unreachable
appear Looks like with the If the Ping command packets sent through the router and reach the target by the routing table the route, but for other reasons (such as firewalls,
nike hyperdunk shoes, etc.) lead to up to, then that is in the routing information did not reach the goal, then there will be
occurs mainly in the following several reasons: to use DHCP to automatically assign IP address of the network, is likely to be DHCP server error or does not work,
lebron iii, so the client can not communicate properly with DHCP and obtain the correct IP address, DHCP server, this can only repair; another subnet mask may be set incorrectly, which only can be modified to correct.
three, Unknown host
the prompt that does not recognize the host, after the problem occurs on the target host is not necessarily the problem? Of course not! Because we use the Ping command to connect to target host name, the main responsible for the use of DNS names into IP addresses. For example = 32 time = 59ms TTL = 54 So when we see this prompt, you should check the DNS settings are correct, DNS is working properly.
when the network connection failure occurs, many administrators will be the first to use Ping to find the root of the problem. But many who find Ping unreasonable, then determine the network has failed. It is not only to judge by appearances, is likely to hide the truth. Then we use the Ping command in the process, in the end pay attention to what the problem? Or please come with me.
one, Request Timed Out
When Ping the specified object, there Of course this case, it is possible that the network fails,
zoom lebron shoes, but can not we be able to determine the network will not work. Because it is also possible that other causes.
host is not online
If the person off, disable the card or disconnect the network cable, then no matter how you operate, the information will not be connected to return. To know the simplest is often the most easily overlooked.
firewall is blocking
When you install a firewall, as firewalls work, in general can automatically block the Ping command from the network, which allowed loss of response. To install a firewall, can not access the shared files will result in failure. Therefore,
lebron shoes, the inspection should turn off the firewall to let the other side, and then use the Ping command to test.
IP security policy restrictions
For many experienced administrators,
nba basketball shoes, they have added the server IP security strategy, to filter ICMP packets, the Ping command unable to respond, which returns
gateway set wrong
Threaded Mode