Which of the following is a layer 2 protocol used to maintain a loop-free network?

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

A. To provide a mechanism for network monitoring in switched environments

B. To prevent routing loops in networks with redundant paths

C. To prevent switching loops in networks with redundant switched paths

D. To manage the VLAN database across multiple switches

E. To create collision domains

Which statement describes a spanning-tree network that has converged?

A. All switch and bridge ports are in the forwarding state.

B. All switch and bridge ports are assigned as either root or designated ports.

C. All switch and bridge ports are in either the forwarding or blocking state.

D. All switch and bridge ports are either blocking or looping.

What does a switch do when a frame is received on an interface and the destination hardware address is unknown or not in the filter table?

A. Forwards the switch to the first available link

B. Drops the frame

C. Floods the network with the frame looking for the device

D. Sends back a message to the originating station asking for a name resolution

In which circumstance are multiple copies of the same unicast frame likely to be transmitted in a switched LAN?

A. During high-traffic periods

B. After broken links are reestablished

C. When upper-layer protocols require high reliability

D. In an improperly implemented redundant topology