单项选择题
You are the Cisco Network Designer in Cisco.com. Which statement is correct regarding NBARand 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.
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Usersofasite-to-siteVPNarereportingperformanceproblems.TheVPNconnectionemploysIPSecandGREandtraversesseveralEthernetsegments.TheVPNpacketsarebeing fragmentedastheytraversethelinks.Whatwouldbetwomethodstoovercomethisproblem？（）
A. Employ path MTU discovery.
B. Set the MTU higher than 1500 bytes.
C. Turn off pre-fragmentation for IPSec.
D. Set the MTU value to 1400 bytes. -
单项选择题
YouaretheCiscoNetworkDesignerinCisco.com.Whichofthesestatementsistrueofclientlessend-userdevices？（）
A. They do not receive unique IP addresses.
B. RADIUS or LDAP is required.
C. They are assigned addresses from the internal DHCP pool.
D. Their traffic appears to originate from the originating host network. -
多项选择题
WhataretwodesignguidelinesforVoIPnetworks？（）
A. Delay should be no more than 10 ms.
B. Loss should be no more than 1 percent.
C. Jitter should be less then 40 ms.
D. Managed bandwidth is strongly recommended for voice control traffic.
