I got this practice exam from SYBEX 6th ed.
5. 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
-- my answer here is "C" because the question is what is the purpose of the STP and not purpose of switch in a LAN right.. In the book the right answer is "E" i dont know if there's only a typo. Please correct me if im wrong..