Laboratory for Communications Engineering Engineering Department, University Of Cambridge Wired vs Wireless vs Surface Physical MediumWired networkWireless network Networked Surface BandwidthHighLimited High (though not quite as good as a shielded wire) Multi-Access Dedicated Connections Possible Intrinsically Shared Medium Dedicated Connections Possible MobilityTethered3D-Free Surface-based 2D-Free Power Can easily be provided Hard to provide Can be provided, with safety concerns