Consult everybody a great god, and architecture in the software on the IIS, 30 computers connect to the server at the same time, sometimes there will be 1 ~ 2 PCS of the randomness of the server, even can not on ping tong Telnet port 80, wait a minute May 20 minutes, is likely to half a day, and good, this is what circumstance, randomness, time and computer are not sure,