Zero-Slot LAN:-

A local-area network (LAN) that uses one of the existing serial or parallel ports on the computer rather than a special network interface card plugged in to the computer's expansion bus. Because zero-slot LANs can only transmit as fast as the computer's output port, they are considerably slower than networks that user network-specific hardware and software. The maximum length of each cable segment is also severely limited, so zero-slot LANs can network only two or three computers. The advantage of a zero-slot LAN is its low cost compared with dedicated network systems; however, the prices of newer peer-to-peer networks are beginning to negate this advantage.

Zmodem:-

A popular file transfer protocol available in many off-the-shelf and shareware communications packages, as well as on many bulletin board systems. Zmodem is similar to Xmodem and Ymodem but is designed to handle larger data transfers with fewer errors. Zmodem also includes a feature called checkpoint restart, which allows an interrupted transmission to resume at the point of interruption, rather than starting again at the beginning of the transmission.

Zone:-

On a local-area network (LAN) such as AppleTalk a logical subgroup of users within a larger group of interconnected networks.