單項選擇題

Which statement about SNMP is true？（）

A.SNMP version 2 uses a proxy agent to forward GetNext message to SNMP version 3.
B.SNMP version 2 supports message integrity to ensure that a packet has not been tampered with
C.Proxy agents were used only in SNMP version 1.
D.SNMP version 3 supports encryption and SNMP version 2 support authentication.
E.GetBulk messages are converted to GetNext messages by the proxy agent and are then forwarded to the SNMP version 1 agent.

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多項選擇題

In relation to MPLS Multicast VPN， which three statements about multicast distribution （MDT） groups aretrue？（）

A.Default MDT groups are used for PIM control traffic， low-bandwidth sources， and flooding of sparse mode traffic.
B.MDTs are built in customer networks
C.Data MDT groups are used for high-bandwidth sources to reduce replication to uninterested PEs.
D.MDTs are built in provider networks
E.The number of MDTs depends on PIM modes of MDT groups.

單項選擇題

Which type of AAL does ATM utilize to deliver CBR traffic？（）

A.AAL2
B.AAL 4
C.AL 5
D.AAL 1
E.AAL 3

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Which statement about SNMP is true？（）

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In relation to MPLS Multicast VPN， which three statements about multicast distribution （MDT） groups aretrue？ （）

Which type of AAL does ATM utilize to deliver CBR traffic？（）

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Which statement about SNMP is true？（）

In relation to MPLS Multicast VPN， which three statements about multicast distribution （MDT） groups aretrue？（）