Which one of the following protocols allows the information about the configuration of a new VLAN to be distributed across entire switched network?

B
B 解析：Explanation:Sybex CCNA Study Guide 4th Edition states on page 359:"The basic goals of VLAN Trunking Protocol (VTP) are to manage all configured VLANs across a switched internetwork and to maintain consistency throughout that network. VTP allows an administrator to add, delete, and rename VLANs-information that is then propagated to all other switches in the VTP domain."Incorrect Answers:A. STP is the Spanning Tree Protocol, used to prevent bridging loops in a LAN.C. EIGRP is a routing protocol used to exchange routing information, not VLAN information.D. SNMP is the Simple Network Management Protocol, used to provide information to remote network management stations.E. CDP is the Cisco Discovery Protocol, which is used to exchange information between Cisco devices. It can only be used between Cisco routers and switches.