H31-161 試験問題を無料オンラインアクセス

The inner VLAN tag in layer 2 user packets is used to differentiated key services from other services. If packets are not processed after being encapsulated by QinQ, the 802. 1p information of the inner VLAN tag becomes invalid. After the QinQ is employed, three methods can be used to configure conditions for sensing 8021p configuration of the inner VLAN tag:
1. Reset the 802.1p of the outer VLAN tag regardless of the existing 02 1p configurations of the inner VLAN tag.
2. Automatically swap the 802. 1p configurations of the inner VLAN tag to that of the outer VLAN tag.
3. Reset the 802.1p configurations of the outer VLAN tag based on the existing 802.1p configurations of the different VLAN tags

• A.False
• B.True

Which statement about the edge access layer is true?

• A.It provides additional value-added services and operation support for established calls
• B.It implements call control. With the softswitch technology as the core, it completes basic realtime call control and connection control.
• C.Using the packet technology, it provides a comprehensive transport platform that boasts high reliability, quality of service (QoS) assurance, and large capacity.
• D.It connects users to the network by providing various access means, and converts the format of information so that the information can be transmitted on the network.

Which of the following statements about the Dynamic Host Configuration Protocol (DHCP) snooping function are true?

• A.It prevents Mac Flood attacks.
• B.It prevents fake DHCP server attacks.
• C.It prevents DHCP starvation attacks.
• D.It prevents denial-of-service (Dos) attacks from changing the CHADDR value

Which statement describes the delay variation requirement of the voice service for the IP bearer network?

• A.No strict requirement
• B.Bearer network delay variation + 1s
• C.Bearer network delay variation +100 ms, allowed maximum delay variation +200 ms
• D.Bearer network delay variation = 10 ms. Allowed maximum delay variation =20ms

User A wants to obtain a better network service for business development and signs an SLA with a carrier. User A purchases a bandwidth of 5 Mbit/s to ensure the voice service (requiring short delay), video service, key data services, and other services. If you were the carrier's network administrator, what would you do on the PE to ensure these services?

• A.Mark the VoIP service as EF, set the CIR to 0 Mbit/s, and set the PIR to 1 Mbit/s; mark the video service as AF4 and set the CIR and PIR to 2 Mbit/s; mark key data services as AF3, set the CIR to 1 Mbit/s, and the PIR to 5 Mbit/s; mark other services as AF1, set the CIR to 2 Mbit/s, and set PIR to 5 Mbit/s.
• B.Mark the VoIP service as EF and set the CIR and PIR to 2 Mbit/s; mark the video service as AF3 and set the CIR and PIR to 2 Mbit/s; mark key data services as AF4, set the CIR to 2 Mbit/s, and the PIR to 5 Mbit/s; mark other services as BE, set the CIR to 0 Mbit/s, and set PIR to 5 Mbit/s.
• C.Mark the VoIP service as AF4, set the CIR to 0 Mbit/s, and set the PIR to 1 Mbit/s; mark the video service as EF and set the CIR and PIR to 5 Mbit/s; mark key data services as AF3, set the CIR to 2 Mbit/s, and the PIR to 5 Mbit/s; mark other services as BE, set the CIR to 0 Mbit/s, and set PIR to 2 Mbit/s.
• D.Mark the VoIP service as EF, set the CIR to 1 Mbit/s, and set the PIR to 1 Mbit/s; mark the video service as AF4, set the CIR to 2 Mbit/s, and set the PIR to 2 Mbit/s; mark key data services as AF1, set the CIR to 2 Mbit/s, and the PIR to 5 Mbit/s; mark other services as BE, set the CIR to 0 Mbit/s, and set PIR to 5 Mbit/s.