Ping — speed of connection and by the work-load of ductings along the whole length from a client to the server.
Complete absence of ICMP-replys can also mean that a remote site (or some from intermediate routers) blocks ICMP Echo-reply or ICMP Echo-request ignores.
Program of ping is one of the fixed diagnostic assets in the networks of Tcp/ip and included in supplying with all modern network operating systems. Functionality of ping is also realized in some built-in WASP of routers, access to the results of implementation of ping for such devices on protocol of SNMP is determined RFC 2925 (Definitions of Managed Objects for Remote Ping, Traceroute, and Lookup Operations).
Because the program utillizes ICMP and creates raw-pacets, for its implementation rights for a superuser are needed in the unix-системах. That ordinary users could utillize ping on /bin/ping SUID put beaten in rights for access.
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Regular expression
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In computing, regular expressions provide a concise and flexible means for identifying text of interest, such as particular characters, words, or patterns of characters. Regular expressions are written in a formal language that can be interpreted by a regular expression processor, a program that either serves as a parser generator or examines text and ...
