叠加overlay

A .  The L2 multicast frames are encapsulated in an OTV packet using the configured control-group multicast address for transport B .  The L2 multicast frames are dropped because multicast cannot be carried across the overlay  C .  The L2 multicast frames are encapsulated in an OTV packet using the configured data-group multicast address for transport D .  The L2 multicast frames are forwarded natively across the overlay based on their multicast ID

A . 正确 B . 错误

A . 正确 B . 错误

A .  Join interface is a Layer 3 entity， and with the Cisco NX-OS release 6.0， it can only be defined as a physical interface， physical subinterface， Layer 3 port channel， or Layer 3 port channel subinterface. B .  A single join interface can be defined and associated with a given OTV overlay. C .  Multiple overlays can also share the same join interface. D .  Join interface can be a loopback interface. E .  The join interface is a Layer 3 entity that can be defined as a physical interface but not as a logical one.

A . 可以减少CE的数量 B . 对PE设备的功能、性能要求降低了 C . 营运商没有必要知道VPN客户的理由信息 D . 可以保证客户节点间最优的路由，并无需全连接（full-mesh）的虚电路

A . CE-router B . PE-router C . P-router D . 没有路由协议邻居

A .  The AED is responsible for sending all unicast traffic in a site， while either node in a site can transmit multicast and broadcast. B .  The AED is responsible for load balancing all traffic for all VLANs across the transport network. C .  The AED is responsible for handling all unicast， broadcast， and multicast traffic for a given VLAN within a site. D .  The AED is responsible for MAC address dispute contention for a given VLAN.

A . 仅（1） B . （1）（2） C . （1）（2）（3） D . 仅（4）

A . S12500-F B . S9800 C . S6800 D . S12500

A . S12500-F B . S9800 C . S6800 D . S12500

A . MOC B . MTC C . 漫游移动 D . MOI

A . Overlay tunnels can only be configured between border routers capable of supporting IPv4 and IPv6. B . An manual overlay tunnel supports point - to - multipo int tunnels capable of carrying IPv6 and Connectionless Network Service (CLNS) packets. C . Overlay tunneling encapsulates IPv6 packets in IPv4 packets for delivery across an IPv4 infrastructure. D . Overlay tunnels can be configured between border route rs or between a border router and a host capable of supporting IPv4 and IPv6. E . Cisco IOS supports manual, generic routing encapsulation (GRE), IPv4 - compatible, 6to4, and Intra - Site Automatic Tunnel Addressing Protocol (ISATAP) overlay tunneling mechan isms. F . Cisco IOS supports manual, generic routing encapsulation (GRE), IPv6 - compatible, 4to6, and Multiprotocol Label Switching (MPLS) overlay tunneling mechanisms.

A．UDP B．TCP/IP C．PPP D．GFP

A．服务发现 B．地址通告和映射 C．隧道管理 D．数据转发

A．Overlay方案 B．Underlay方案 C．两种都不需要 D．两种都需要

A．硬件厂商 B．软件厂商 C．国际标准 D．企业标准

是 否

A．VLAN B．NVGRE C．MPLSL2VPN D．VXLAN

是 否