NComputing PC Expanion L120 - Manual (Page 93)

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Log on
In general computer usage, logon is the procedure used to get access to
an operating system or application, usually in a remote computer.
Almost always a logon requires that the user has (1) a user ID and (2) a
password. Often, the user ID must conform to a limited length such as
eight characters and the password must contain at least one digit and
not match a natural language word.
MAC Address
In a local area network (LAN) or other network, the MAC (Media Access
Control) address is your computer's unique hardware number. (On an
Ethernet LAN, it's the same as your Ethernet address.) When you're
connected to the Internet from your computer (or host as the Internet
protocol thinks of it), a correspondence table relates your IP address to
your computer's physical (MAC) address on the LAN. The MAC address is
used by the Media Access Control sublayer of the Data-Link Layer (DLC)
of telecommunication protocols. There is a different MAC sublayer for
each physical device type. The other sublayer level in the DLC layer is the
Logical Link Control sublayer.
NIC (Network Interface Card)
A network interface card (NIC) is a computer circuit board or card that is
installed on a computer so that it can be connected to a network.
Router
In packet-switched networks such as the Internet, a router is a device
or, in some cases, software in a computer, that determines the next
network point to which a packet should be forwarded toward its
destination. The router is connected to at least two networks and
decides which way to send each information packet based on its
current understanding of the state of the networks it is connected to.