NETWORK SYSTEMS
System Design & Integration
  Point to Point Design
  Star Design
  Ring Design
  Network Bus Design
Cabling & Infrastructure

Also utilized by data communications it is supported by the IEEE 802.5 standard. All nodes share a common line. Transmition occurs in both directions. When one node transmits, all othe node recieve the transmission at the same time. Most popular systems include:

Ethernet
MAP
Token Bus