Computer Networking
When setting up Frame Relay for point-to-point subinterfaces, which of the following must not be configured?

An IP address on the physical interface
The subinterface type as point-to-point
The local DLCI on each subinterface
PAP
The Frame Relay encapsulation on the physical interface

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Computer Networking
What is the purpose of Spanning Tree Protocol in a switched LAN?

To manage the VLAN database across multiple switches
To prevent routing loops in networks with redundant paths
To prevent switching loops in networks with redundant switched paths
To provide a mechanism for network monitoring in switched environments
To create collision domains

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