In asymmetric dual-homing CE networking, which of the following
statements about the VPN are true?

• A.RTs in the VPN instances configured on PE 2a and PE 2b may be different
• B.RDs in the VPN instances configured on PE 2a and PE 2b may be different.
• C.RDs in the VPN instances configured on PE 2a and PE 2b must be the same.
• D.RTs in the VPN instances configured on PE 2a and PE 2b must be the same.

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In MPLS QoS, traffic policies are developed based on simple traffic classification and complex traffic classification. In traffic policies based on simple traffic classification, the service class, color, and drop priority of packets are reset based on the tags in packets. In traffic policies based on complex traffic classification, measures such as traffic policing, priority re-marking, packet filtering, policybased routing, and traffic sampling are implemented based on the traffic type. Generally, simple traffic classification is applied on border routers in DiffServ domains, and complex traffic classification core routers. QoS traffic policies are configured by performing the following operations:
1. Defines DiffServ domains and configuring a traffic policy.
2. Classifies traffic.
3. Defines traffic behaviors and configures characteristics of behaviors.
4. Defines a traffic policy and specifies actions for traffic categories.
5. Applies the traffic policy.
6. Configures L-LSP.
7. Configures reverse address check.
8. Adds interfaces to the DiffServ domains.
Which of the preceding operations are required when you configure simple traffic classification?

• A.2 3 4 8
• B.1 5 6
• C.2 4 5 7
• D.1 6 8

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As shown in the figure, CEs connect to users 1 and 2 through access
interfaces or links.
[Quidway-GigabitEthernet1/0/4]portswitch
[Quidway-GigabitEthernet1/0/4]port link-type access
[Quidway-GigabitEthernet1/0/4]port default vlan 1
[Quidway-GigabitEthernet1/0/6]portswitch
[Quidway-GigabitEthernet1/0/6]port link-type access
[Quidway-GigabitEthernet1/0/6]port default vlan 2
[Quidway-GigabitEthernet1/0/3]portswitch
[Quidway-GigabitEthernet1/0/3]port link-type trunk
[Quidway-GigabitEthernet1/0/3]port trunk permit-pass vlan 1 to 2
Users 1 and 2 require different network transmission quality. Which of the following methods are feasible to configure 802.1p priority 1 for packets of user 1 and 802.1p priority 2 for packets of user
2?

• A.On a CE, configure STC for user VLANs on the user access side.
• B.On a PE, configure Dot1q tunnel interfaces and simple traffic classification (STC) for interfaces on the private network.
• C.On a PE, configure vlan-mapping and STC for interfaces on the private network for users 1 and 2.
• D.On a PE, configure vlan-stacking and STC for interfaces on the private network for users 1 and 2.

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With the NAT technology, which of the followingelements can be translated?

• A.Destination port number
• B.Session table
• C.Source port number
• D.Source IP
• E.Destination IP

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On the IP bearer network, which of the following methods can be used to manage devices on the backbone network and switches on the signaling VPN?

• A.Leak public and private network routes to manage devices on the public and private networks.
• B.Construct an outband NM network to manage all devices.
• C.Establish two physical or logical links with the PE to manage devices on the public and private networks. One link belongs to the public network and the other belongs to the private network.
• D.Establish a physical or logical link with the PE and mount MCEs to the PE to manage devices on the public and private networks.

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