Pouzite zdroje:
 * http://docs.python.org/
 * http://en.wikipedia.org/wiki/Berkeley_Packet_Filter
 * Manualove stranky: bpf -- Berkeley Packet Filter
 * HOWTO: Using the BPF device under FreeBSD: http://canmore.annwfn.net/freebsd/bpf.html
 
 * RFC792
 * http://en.wikipedia.org/wiki/Ethernet
 * http://en.wikipedia.org/wiki/Address_Resolution_Protocol
 * http://en.wikipedia.org/wiki/IPv4
 * http://en.wikipedia.org/wiki/Dynamic_Host_Configuration_Protocol
 * http://en.wikipedia.org/wiki/User_Datagram_Protocol
 * http://en.wikipedia.org/wiki/Internet_Control_Message_Protocol