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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MD5 (Message-Digest algorithm 5) was developed by Professor Ronald L. Rivest and is a widely used cryptographic hash function with a 128-bit hash value. As an Internet standard MD5 has been employed in a wide variety of security applications, and is also commonly used to check the integrity of files. An MD5 hash is typically expressed as a 32-character hexadecimal number.
