248 APPENDIX E: GLOSSARY
Virtual LAN (VLAN) A Virtual LAN is a collection of network nodes that share the same 
collision domain regardless of their physical location or connection 
point in the network. A VLAN serves as a logical workgroup with no 
physical barriers, and allows users to share information and resources as 
though located on the same LAN. 
XModem A protocol used to transfer files between devices. Data is grouped in 
128-byte blocks and error-corrected.