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  3. H12-891_V1.0

Huawei H12-891_V1.0 Exam (page: 18)
Huawei HCIE-Datacom V1.0
Updated on: 15-Feb-2026

Viewing Page 18 of 123
H12-891_V1.0 PDF 610 Questions

The HTTP protocol is based on TCP, so http Flood attacks can be defended against HTTP Flood attacks using the TCP Flood attack prevention method.

  1. True
  2. False

Answer(s): B



Firewall security policies have the condition for traffic matching to be ?( Multi-select)

  1. apply
  2. Source item security zone
  3. Source item IP address
  4. Message length

Answer(s): A,B,C



The most effective way to view device warnings through the CLI is ?

  1. Display alarm
  2. Display current-configuration
  3. Display interface brief
  4. Display clock

Answer(s): A



Although the STP protocol can solve the loop problem, it affects the quality of user communication due to the slow convergence of the network topology. RSTP has made many improvements to STP, which of the following is not an improvement of RSTP to STP?

  1. In addition to the 3 port states, RSTP vice adds 2 new port roles
  2. Non-root switches running RSTP send configuration BPDUs at intervals specified by Hello Timer, a behavior that is entirely autonomous for each device
  3. RSTP port state specification is divided according to whether the port forwards user traffic and learns the MAC address, reducing the original 5 port states to 3
  4. If a port does not receive a configuration BPDU sent by the upstream device for 4 consecutive Hello Time, the device considers the negotiation with this neighbor to fail

Answer(s): D



The following statement about OSPF route filtering is incorrect.( Single choice questions).

  1. In the NSSA area, filtering for external route ingestion and advertisement can be configured on ASBR or ABR
  2. Filtering for the three types of LSAs needs to be configured on the ABR across OSPF regions
  3. Interface-based filtering of LSAs allows all LSAs in the inbound and outbound directions except grace LSAs
  4. Based on the link state database, when calculating routes, the fiter-policy import command is used, which only affects the route addition in the route table, and has no effect on the OSPF link state database

Answer(s): C



Viewing Page 18 of 123



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