Foracceptablevoicecalls，thepacketerrorrateshouldbenohig……

多项选择题Whichtwoofthesearerecommendedpracticeswithtrunks？（）

A.use ISL encapsulation
B.use 802.1q encapsulation
C.set ISL to desirable and auto with encapsulation negotiate to support ILS protocol negotiation
D.use VTP server mode to support dynamic propagation of VLAN information across the network
E.set DTP to desirable and desirable with encapsulation negotiate to support DTP protocol negotiation

多项选择题Whichtwodesignconcernsmustbeaddressedwhendesigningamulticastimplementation？（）

A.only the low-order 23 bits of the MAC address are used to map IP addresses
B.only the low-order 24 bits of the MAC address are used to map IP addresses
C.only the high-order 23 bits of the MAC address are used to map IP addresses
D.only the low-order 23 bits of the IP address are used to map MAC addresses
E.the 0x01004f MAC address prefix is used for mapping IP addresses to MAC addresses
F.the 0x01005e MAC address prefix is used for mapping IP addresses to MAC addresses

单项选择题Lafeyette Productions is looking for a new ISP that has improved availability, load balancing, and catastrophe protection. Which type of ISP connectivity solution would be best?（）

A. single run
B. multi-homed
C. stub domain EBGP
D. direct BGP peering

单项选择题You are the Cisco Network Designer in Cisco.com. Which statement is correct regarding NBAR and NetFlow?（）

A. NBAR examines data in Layers 1 and 4.
B. NBAR examines data in Layers 3 and 4.
C. NetFlow examines data in Layers 3 and 4.
D. NBAR examines data in Layers 2 through 4.

单项选择题Whichsite-to-siteVPNsolutionallowsCiscorouters，PIXFirewalls，andCiscohardwareclientstoactasremoteVPNclientsinordertoreceivepredefinedsecuritypoliciesandconfigurationparametersfromtheVPNheadendatthecentralsite？（）

A.Easy VPN
B.GRE tunneling
C.Virtual Tunnel Interfaces
D.Dynamic Multipoint VPN
E.Group Encrypted Transport VPN