H12-891

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

Question 106

When a router receives an IPv6 packet with the Next Header field value in the basic header being 43, the next header must be SRH.

  1. True
  2. False

Question 107

To prevent hackers from attacking user devices or networks using MAC addresses, you can configure MAC addresses of untrusted users as blackhole MAC addresses to filter out such invalid MAC addresses. When receiving a packet whose source or destination MAC address is a blackhole MAC address on a device, the device discards the packet.

  1. True
  2. False

Question 108

An NVE is a network entity that implements network virtualization and must be a physical switch.

  1. True
  2. False

Question 109

Portal authentication is recommended for scenarios with high mobility and numerous terminal types, such as shopping malls and supermarkets. MAC address authentication is recommended for dumb terminals that do not support Portal authentication, such as printers, fax machines, and IP phones.

  1. True
  2. False

Question 110

According to the display command output on the router running OSPF, which of the following statements is correct?

  1. The router is an ABR.
  2. The LSA in the figure is generated by the router.
  3. The destination network described by the LSA is 10.0.23.0/24.
  4. The LSA is an AS-external-LSA.