H12-891

H12-891 practice questions, page 15 of 22, with answer review and explanations.

Question 71

Which of the following statements about VXLAN principles is incorrect?

  1. VXLAN uses MAC-in-UDP encapsulation to encapsulate Ethernet packets into UDP packets and thereby extend Layer 2 networks.
  2. VXLAN can be deployed on campus networks to implement Layer 2 and Layer 3 communication.
  3. VXLAN packets are forwarded through routes on the underlay network, and the MAC address of the terminal in the inner data frame is not considered during underlay forwarding.
  4. When VXLAN is deployed, in addition to devices at both ends of a VXLAN tunnel, intermediate forwarding devices are also required to support VXLAN. Otherwise, VXLAN packets cannot be forwarded.

Question 72

As shown in the figure, Site1 and Site2 need to communicate through a carrier's BGP/MPLS IP VPN. A public network tunnel has been established between PE1 and PE2 (label information is shown in the figure). PE1 has advertised the 192.168.1.0/24 route of Site1 to PE2 through MP-IBGR and route learning is normal. What is the top label in a data packet transmitted on the link P -> PE1 if the packet is sent by Site2 to 192.168.1.0/24 of Site1?

  1. 3
  2. 6662
  3. 6661
  4. 8888

Question 73

On the network shown in the following figure, the gateways of the PCs are located on the aggregation switches. Which of the following is not a correct configuration to achieve load balancing across the gateways?

  1. Configure multiple VRRP backup groups on the aggregation switches.
  2. Configure priorities for the aggregation switches so that each of them functions as the master device of a virtual router.
  3. Configure different gateway addresses on the PCs so that traffic can be evenly distributed between the gateways.
  4. A VRID is only locally significant. Therefore, the two aggregation switches can be configured with different VRIDs for the same virtual router.

Question 74

This figure shows typical two-city three-center networking. Which of the following devices is responsible for connecting branches to the bearer WAN?

  1. DC-PE
  2. BR-CE
  3. BR-PE
  4. WAN-P

Question 75

Which of the following Layer 3 logical interfaces on a Layer 3 VXLAN gateway is used to implement communication between different VXLAN networks?

  1. VLANIF interface
  2. VBDIF interface
  3. NVE interface
  4. Layer 2 sub-interface