Can be part of a NIC or an independent unit such as is attached to a vampire tap into an Ethernet thicknet backbone. NIC - Network Interface Card. Node - a host. Packet - the smallest indivisible collection of data and control information necessary to communicate between two hosts. Parity - an extra bit prepended to each byte for error detection purposes.
Parity can only detect errors in which a single bit is changed.
Patch Panel - Crossconnect point for data connection from hub ports to station cable or phone block. The station cable or phone block cable is punched down on the back on the patch panel, and patch cords are used to connect the patch panel ports to hub ports. PDM - Phase Division Multiplexing. PM - Phase Modulation. A topology where only one node is attached to each end of a segment, with no nodes in the middle.