Based on whether or not protocols support routing, they can be
categorized as routable or non-routable protocols.
Routable Protocols
Routable protocols support communication between LANs or network
segments that may be spread throughout a building, across a small
geographic area, such as a college campus, or across the globe, such
us the Internet. Routable protocols support the transmission of data
from one network segment to another along any of several paths
connecting the two network segments. Examples of routable protocols
are TCP/IP and IPX/SPX.
Non-Routable Protocols
Non-routable protocols, unlike routable protocols, do not support
the transmission of data from one network segment to another.
Computers that use non-routable protocols can communicate only with
other computers in the same network segment. NetBEUI and Data Link
Control (DLC) are examples of nonroutable protocols.
