Link layer: introduction
Link layer: context datagram transferred by different link protocols over different links: e.g., Ethernet on first link, frame relay on intermediate links, 802.11 on last link
The Basic Types of Bridges
These types of bridges are modern variations of the cable-stayed bridges. In such bridges, the distribution of forces does not depend entirely on the cantilever action of the spar (supporting tower).
Technical note
This reference is intended for preliminary specialty-cable research. Compatibility, link budgets, fire performance, installation methods, test limits and applicable standards must be verified for the specific project.