Ccna certification Practice Tests

A.  IEEE 802.1w

B. PVST+

C. CST

D. RSTP

 122.  Which protocol is a Cisco proprietary enhancement for 802.1W that allows separate 

spanning-tree instances for each VLAN?

A.  Rapid PVST+

B. PVST+

C. CST

D. RSTP+

 123.  Which statement is correct about the Common Spanning Tree (CST)?

A.  CST elects a root bridge for each VLAN.

B.  CST elects a single root bridge for the entire physical network.

C.  CST has an immediate convergence because it elects a single root bridge.

D.  CST is best implemented for really large networks because it scales efficiently.

 124.  Which statement is correct about RSTP?

A.  RSTP allows for multiple root bridges.

B.  RSTP is backward compatible with STP.