Please answer these multiple choices

19. Which is true: 1) TMN is subset of FCAPS 2) No function is matched berween FAB and FCAPS 3) No function is matched between OAMP and FCAPS 4) No function is matched between FAB and OAMP 5) Functions are same among models for managing networks Ans. 20. To prevent security breach by an insider the best approach is to 1) create a separate secure management network 2) do criminal background check on all employees dealing with network management 3) use of tamper- proof security audit trials 4) managing roles of users 5) assign root privileges only to managens Ans. 21. SNMP is: 1) application layer protocol 2) not a NMS 3) same as SMTP 4) transport protocol 5) 1 and 2 Ans. 22. What is the purpose of Spanning Tree Protocol in a switched LAN? 1) to provide a mechanism for paths 3) to prevent switching loops in networks with redundant switched paths 4) to manage the VLAN database across multiple switches 5) to create collision domains Ans. 23. Which statement describes a spanning-tree network that has converged? 1) All switch and bridge ports are in the forwarding state. 2) All switch and bridge ports are assigned either root or designated ports. 3) All switch and bridge ports are in either the forwarding or blocking state. 4) All switch and bridge ports are either blocking or looping. 5) None above. Ans