A service provider is using QoS to manage customer traffic over the MPLS backbone. Which three statements about the behavior of each MPLS QoS mode based on QoS policy in the service provider core…

This statement is false because Uniform mode does change the original CE IP packet markings at egress if the EXP bits were modified.

In Uniform mode, the MPLS EXP value, which may have been changed within the MPLS cloud, is copied back to the IP packet's QoS field (IP Precedence or DSCP) upon egress, thus changing the original CE IP packet markings.

In Pipe mode, the original IP packet QoS markings are preserved within the IP header, and the MPLS EXP bits are used only for QoS within the MPLS domain. The EXP value is not copied back to the IP header upon egress, so the original CE IP packet markings remain unchanged.

This statement is false because Pipe mode does not change the original CE IP packet markings; it preserves them.

Similar to Pipe mode, Short-pipe mode preserves the original IP packet QoS markings; the MPLS EXP value is used for forwarding within the MPLS domain but does not rewrite the IP header's QoS fields upon egress.

This statement is false because Short-pipe mode does not change the original CE IP packet markings; it preserves them.