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transmission over the Internet. Both TCP and UDP are transport layer protocol. TCP 
performs proper error detection and error recovery, and thus is reliable. UDP on the 
other hand is not reliable. They both run on top of the IP (Internet Protocol), a 
network layer protocol. 
WAN: 
Wide Area Network. A network that connects computers located in 
geographically separate areas (e.g. different buildings, cities, countries). The Internet 
is a wide area network. 
Web-based management Graphical User Interface (GUI): 
Many devices support a 
graphical user interface that is based on the web browser. This means the user can use 
the familiar Netscape or Microsoft Internet Explorer to Control/configure or monitor 
the device being managed.