Which statement is correct regarding NBAR and NetFlow？（）

单项选择题When BGP tuning is used, how is packet flow into the e-commerce module controlled?（）

A. by tracking the status of objects along the path to the e-commerce module
B. by detecting undesirable conditions along the path to the e-commerce module
C. by using the MED to communicate the site preferences for traffic to multiple ISPs
D. by communicating the available prefixes, routing policies, and preferences of each site to its ISP
E. by moving the SLB to a position where selected traffic to and from the servers does not go through the SLB

单项选择题Whichofthesestatementsistrueofclientlessend-userdevices？（）

A.They do not receive unique IP addresses
B.RADIUS or LDAP is required in order to assign IP addresses
C.They are assigned addresses from the internal DHCP pool
D.Their traffic appears to originate from the originating host network

单项选择题To securely transport EIGRP traffic, a network administrator will build VPNs between sites. What is the best method to accomplish the transport of EIGRP traffic?（）

A. IPSec in tunnel mode
B. IPSec in transport mode
C. GRE with IPSec in transport mode
D. GRE with IPSec in tunnel mode

单项选择题Foracceptablevoicecalls，thepacketerrorrateshouldbenohigherthanwhatvalue？（）

A.0.1%
B.1%
C.2.5%
D.25%

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