更戍法
Which three statements regarding Cisco ASAmulticast routing support are correct？ （） [" ASA supports both stubmulticast routing and PIMmulticast routing. However， you cannot configure bothconcurrently on a single security appliance"," When configured for stubmulticast routing， the ASA can act as the Rendezvous Point （RP）"," If the ASAdetects IGMPversion1 routers， the ASAwill automatically switch to IGMP version 1 operations."," The ASA supports both PIM-SM and bi-directional PIM"," Enabling multicast routing globally on the ASA automatically enables PIM and IGMP on all interfaces"," The ASA can be configured for IGMP snooping toconstrain theflooding of multicast traffic by dynamically configuring themulticast traffic to be forwarded only those interfaces associated with hosts requesting themulticast grou"]
考量PTN汇聚设备主要包括哪几个方面？（） ["交换容量","PW\/LSP终结能力","LSP保护组数量","QoS流和MAC地址容量"]
In Layer 2 topologies， spanning-tree failures can cause loops in the network. These unblocked loops cancause network failures because of excessive traffic. Which two Catalyst 6500 features can be used to limitexcessive traffic during spanning-tree loop conditions？（） ["loop guard","storm control","storm suppression","broadcast suppression","BPDU guard"]
目前典型的课程设计模式有目标模式、过程模式、集体审议模式、（）模式。
网络安全涉及到OSI哪几层？
