Which of the following statements are TRUE regarding the remarking of packets arriving on the network interface whose ToS-marking-state is set to trusted and remarking enabled on network egress?…

Question

Options

• ANative IP Packets will not be remarked.
• BNative IP Packets will be remarked.
• CPackets associated with a VPRN service on an upstream node will not be remarked.
• DPackets associated with an ES service on an upstream node will be remarked.

• A
  13% (3)
• B
  70% (16)
• C
  17% (4)

Explanation

When a network interface has ToS-marking-state set to trusted, this only governs how the incoming DSCP/ToS value is used for ingress forwarding-class classification - it does not protect packets from egress remarking. With remarking enabled on egress, all packet types traversing that interface are subject to remarking, including native IP packets (B) and packets associated with an Ethernet/ES service from an upstream node (D). Option A is wrong because it directly contradicts B - native IP packets are not exempt. Option C is wrong because VPRN-associated packets are similarly remarked, not protected, under this configuration.

Memory tip: Split the two concepts: "trusted" = trust the upstream marking on the way in (for classification); "remarking enabled" = rewrite the marking on the way out - these are independent policies, so egress remarking wins regardless of ingress trust state.

No community discussion yet for this question.