A. for multiple ISDN connectionsB. for modem concentrat……

单项选择题Which of these statements best describes VPLS?（）

A. Neither broadcast nor multicast traffic is ever flooded in VPLS.
B. Multicast traffic is flooded but broadcast traffic is not flooded in VPLS.
C. VPLS emulates an Ethernet switch, with eachEMS being analogous to a VLAN.
D. Because U-PE devices act as IEEE 802.1 devices, the VPLS core must use STP.
E. When the provider experiences an outage, IP re-routing restores PW connectivity and MAC relearning is needed.

多项选择题Which two benefits does VoFR provide?（）

A. bandwidth efficiency
B. cell-switching
C. congestion notification
D. heterogeneous network

单项选择题A Fibre Channel fabric (or Fibre Channel switched fabric, FC-SW) is a switched fabric of Fibre Channel devices enabled by a Fibre Channel switch. Fabrics are normally subdivided by Fibre Channel zoning.Each fabric has a name server and provides other services. Higher redundancy over FC-AL, P2P.Which path selection protocol is used by Fibre Channel fabrics?（）

A.OSPF
B.RIP
C.FSPF
D.VSANs

单项选择题The network administrator would like to generate synthetic traffic using the Service Assurance Agent contained in Cisco IOS. Which CiscoWorks network management application will be used to report the latency and availability for configured traffic operations on an end-to-end and hop-byhop (router-to-router) basis?（）

A. nGenius Real-Time Monitor
B. CiscoView
C. Device Fault Manager
D. Internetwork Performance Monitor

单项选择题You are the Cisco Network Designer in Cisco.com. In your company site, a NAS is both physically and logically in the traffic path. The NAS identifies clients solely based on their MAC addresses. In which access mode has this NAS been configured to operate?（）

A. Layer 2 mode
B. Layer 2 Edge mode
C. Layer 3 mode
D. Layer 3 In-Band mode