RT Journal Article SR Electronic A1 HAMBALÍK, Alexander T1 COMMUNICATION NETWORKS AND COMMUNICATION PROTOCOLS JF Trends in education YR 2011 VO 4 IS 1 SP 280 OP 283 UL https://tvv-journal.upol.cz/en/artkey/tvv-201101-0069.php AB This paper contains information that describes as well as demonstrates processes in networks LAN and WAN at the same time.