Which three are true about MPLS

第1题：

Which three statements about NetFlow are true？（）

• A、NetFlow records unidirectional IP traffic flow.
• B、NetFlow records MPLS frame flow.
• C、NetFlow expert is only over TCP.
• D、NetFlow records is only over UDP.
• E、NetFlow records subinterface information of traffic flow.

第2题：

Which two QoS classification and marking statements are true？（）

• A、 In a Frame Relay network， delay sensitive traffic is tagged with the discard eligible （DE） bit.
• B、 In an MPLS network， the three most significant bits of the DSCP or the IP precedence of the IP packet are copied into the MPLS EXP field
• C、 In an MPLS network， the MPLS EXP bits are used to identify up to 16 CoS values.
• D、 The differentiated services code point （DSCP） field consists of the first three bits of the IP precedence field in the header of an IP packet.
• E、 The 802.10 standard uses a three bitfield referred to as the user priority bits （PRI） to mark packets as belonging to a specific CoS.

第3题：

第4题：

Which statement about MPLS traffic engineering policy-based tunnel selection （PBTS） is not true？（）

• A、The tunnel that is not configured with the policy-class command acts as the default
• B、EXP selection is between multiple tunnels to the same destination
• C、There is no requirement for IGP extensions
• D、Tunnels are configured using the policy-class command and carry multiple EXP values
• E、It supports VRF traffic， IP-to-MPLS switching， and MPLS-to-MPLS switching

第5题：

Which three statements are true about terms in a policy?（）

• A、The order of the terms in a policy is irrelevant
• B、The action is specified in a then statement
• C、Ters are optional in a policy
• D、The match condition can be identified with a from statement
• E、Every policy must contain at least one term

第6题：

Which two QoS classification and marking statements are true？ （）

• A、 In a Frame Relay network， delay sensitive traffic is tagged with the discard eligible （DE） bit.
• B、 In an MPLS network， the three most significant bits of the DSCP or the IP precedence of the IP packet are copied into the MPLS EXP field.
• C、 In an MPLS network， the MPLS EXP bits are used to identify up to 16 CoS values.
• D、 The differentiated services code point （DSCP） field consists of the first three bits of the IP precedence field in the header of an IP packet.
• E、 The 802.1Q standard uses a three bit field referred to as the user priority bits （PRI） to mark packets as belonging to a specific CoS.

第7题：

Which statement about ATM AAL5 over MPLS is true？（）

• A、It supports ATM signaling.
• B、It supports traffic shaping of packets in MPLS to the ATM path.
• C、It supports ATM switched virtual circuits
• D、It supports fragmentation and reassembly.
• E、It supports AAL5 SDU switching

第8题：

第9题：

Which three functions can CCC be used for？（）

• A、To interconnect VLANS
• B、To interconnect ATM VCs
• C、To interconnect MPLS LSPs
• D、To interconnect MPLS VPNs

第10题：

Which three characteristics are true about voice traffic in the campus network？ （）

• A、TCP retransmits
• B、benign
• C、greedy
• D、drop sensitive
• E、smooth
• F、delay insensitive