U-W

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UBR

Unspecified Bit Rate

Under-provisioning

Having more allocated traffic than available bandwidth.

Under-subscribing

Having more bandwidth than allocated traffic. (Telco)

UNI

User Network Interface

VSAT

Very Small Aperture Terminal (Satellite Communications)

VBR

Variable Bit Rate

VLAN

Virtual Local Area Network

VPLS

Virtual Private LAN Service

VPN

Virtual Private Network

VPWS

Virtual Private Wire Service

VRF802.1Q/p Layer-2

VLAN and Quality of Service (QoS) protocol

WDM

Wavelength Division Multiplexing

WFWQ

Weighted Fair Weight Queuing

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