Visio Networking Icons Stencil - Cisco CVD and Custom Icons — WIRES AND WI.FI
Stenciltown - Network Stencils v.2.12p
Cisco Networking Center: Cisco Icons ~ Network Diagram Example
Visio Stencils: Basic network diagram – Techbast
Design elements - Internet symbols | Internet symbols - Vector stencils library | Local area network (LAN). Computer and Network Examples | Internet Symbols