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What is true about Quality of Service (QoS) for VPNs?()

发布日期:2020-04-13

What is true about Quality of Service (QoS) for VP...
A

QoS preclassification is only supported on generic routing encapsulation (GRE) and IPsec VPNs

B

QoS preclassification is not required in Layer 2 Tunneling Protocol (L2TP), Layer2 Forwarding (L2F), and Point-to-Point Tunneling Protocol (PPTP) VPNs

C

QoS preclassification is supported on IPsec AH VPNs, but not on IPsec ESP VPNs

D

the QoS-for-VPNs feature (QoS preclassification) is designed for VPN transport interfaces

E

with IPsec tunnel mode, the type of service (ToS) byte value is copied automatically from the original IP header to the tunnel header

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