H31-161 · Question #49
RTA is an edge router of the MPLS backbone network. It provides the access service for users under Layer 2 switches and differentiates users by subinterface. User A accesses VLAN 100 and has…
The correct answer is C. At least three EXP values may be contained, and the values are uncertain. See the full explanation below for the reasoning.
Question
RTA is an edge router of the MPLS backbone network. It provides the access service for users under Layer 2 switches and differentiates users by subinterface. User A accesses VLAN 100 and has subscribed to the HSI, VoIP, and IPTV services. According to 802.1p priorities, the value 0 indicates the HSI service, 1 indicates the VoIP service, and 4 indicates the IPTV service. The DiffServ model is deployed in E-LSP mode on the MPLS network, and the STC is configured for subinterfaces on the access side of RTA (the qos phb disable command is not configured). Outgoing traffic on the G1/0/0.1 subinterface involves the HSI, VoIP, and IPTV services on the access side of RTA. Which statement about EXP values corresponding to these three services is true?
Exhibit
Options
- AOnly one EXP value may be contained, and the value is uncertain.
- BOnly two EXP values may be contained, and the values are uncertain.
- CAt least three EXP values may be contained, and the values are uncertain.
- DThe EXP values must be 0, 1, and 4.
How the community answered
(30 responses)- A3% (1)
- B7% (2)
- C77% (23)
- D13% (4)
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