H12-891

H12-891 practice questions, page 10 of 22, with answer review and explanations.

Question 46

Which of the following statements regarding MPLS label encapsulation format are correct? (Choose three.)

  1. The total length of one layer of MPLS label is 4 bytes.
  2. The TTL field in an MPLS label has the similar meaning as that in an IP packet, and can prevent loops.
  3. The S field in an MPLS label has 1 bit and is used to identify whether the label is the bottom-of-stack label. If the value is 1, the label is a penultimate-layer label.
  4. For Ethernet and PPP packets, a label stack is located between the Layer 2 packet header and data. If a VLAN tag is available, the label stack is placed between Ethernet header and the VLAN tag.

Question 47

Which of the following topologies does the overlay network support in the Huawei SD-WAN Solution?

  1. Hub-spoke
  2. Full-mesh
  3. Partial-mesh
  4. Hierarchical

Question 48

In the Huawei CloudCampus Solution, which of the following deployment modes are supported by Huawei switches?

  1. CLI
  2. Web interface
  3. Huawei registration center
  4. DHCP Option 148

Question 49

Which of the following types of authorization information can be delivered by a RADIUS server after a client passes 802.1 X authentication? (Choose three.)

  1. MAC address
  2. ACL
  3. VLAN ID
  4. UCL group

Question 50

As shown in the figure, in a scenario where a VXLAN tunnel is dynamically established through BGP EVPN, VTEP1 transmits a BGP EVPN Type 2 route to VTEP2. The EVPN RT value is 20:1. Which of the following items are incorrect? (Choose two.)

  1. VTEP2 directly discards the route.
  2. VTEP2 compares the RT carried in the route and finds that it is different from the IRT of the EVPN instance bound to BD 20. Therefore, VTEP2 discards the route.
  3. VTEP2 compares the RT carried in the route with the IRT of the EVPN instance bound to BD 20. Because the RTs are different, VTEP2 does not add the MAC address entry carried in the route to the MAC address table of BD 20.
  4. VTEP2 compares the RT carried in the route with the IRT bound to the IP VPN instance VTEP_VBDIF20. Based on this, VTEP2 learns the IP route carried in the route advertisement packet and adds the route to the IP routing table of the IP VPN instance.