Huawei Huawei Certifications H12-891 Questions & Answers

• Question 301:

  If you delete a declared route entry on a BGP router, the BGP routing ring is triggered to send an Update message for route scattering, which carries the accepted mandatory attribute of the route entry that was discarded.

  A. True

  B. False

  Correct Answer: B

• Question 302:

  In a shared network, what mechanism does PIM-SM use to prevent duplicate traffic?( Single choice questions).

  A. Register mechanism

  B. BSR/RP mechanism

  C. Assert mechanism

  D. Join/Prune mechanism

  Correct Answer: C

• Question 303:

  The following description of VRRP load sharing is correct?( Multiple choice questions).

  A. When configuring priority, make sure that the same router acts as a master in the three VRRP backup groups

  B. You can create multiple VRRP backup groups on one interface of a router . The router can act as a master for one VRRP backup group and as a backup for other VRRP backup groups

  C. When you deploy load sharing, hosts in the same LAN are required to configure the IP addresses of different virtual routers as gateway addresses for missing provinces

  D. VRRP load sharing requires at least two virtual routers to provide forwarding services at the same time

  Correct Answer: BCD

• Question 304:

  In inter-domain packet filtering, which of the following options belongs to the outbound direction?

  A. trust -->Local

  B. untrust--> dmz

  C. trust--> untrust

  D. untrust--> trust

  Correct Answer: C

• Question 305:

  Regarding the WRR (Weight Round Robin) description of the error is ?( Multiple select).

  A. WRR avoids congestion in the network

  B. WRR guarantees that various queues are allocated to a certain amount of bandwidth

  C. WRR is a congestion management technique

  D. WRR can no longer use

  E. WRR on GE interfaces to ensure that critical services are prioritized for

  Correct Answer: AE

• Question 306:

  Regarding the Stub region and the NSSA region of the OSPF protocol , the following statement is incorrect with a single choice

  A. Neither the Stub region nor the NSSA region allows injection of Type4 LSA

  B. Type5 LSA injection is not allowed in the Stub region, while Type5LSA injection is allowed in the NSSA region

  C. Type7LSA injection is not allowed in the Stub region, while Type7LSA injection is allowed in the NSSA region

  D. Both the Stub region and the NSSA region allow injection of Type3 LSA

  Correct Answer: B

• Question 307:

  OSPFv2 is an IGP running on an IPV4 network; OSPFV3 is an IGP running in an IPV6 network IGP, OSPFv3 in the network has a similar LSA type compared to OSPFV2, but the functionality is slightly different, osPFv3LSA type does not include which of the following?

  A. Router-LSA

  B. Network-LSA

  C. Asbr-summary-LSA

  D. AS-external-LSA

  Correct Answer: C

• Question 308:

  Which of the following scenarios send free ARP messages?( Multiple choice questions).

  A. After the VRRP protocol master and standby role election is completed

  B. The DHCP client receives an acknowledgment message from the server after it sends it

  C. When a new host configured with an IP address is connected to the network

  D. When a host connected to the switch issues a Ping message.

  Correct Answer: ABC

• Question 309:

  A company's two-layer phase network architecture as shown in the figure, when the engineer is configured to find that the business between departments can not communicate, through the command to view the status of the equipment as follows, please determine the possible causes?

  

  A. The BPDU interval between switches is not configured

  B. The Transition VLAN mapping between the handover machines is not configured to be caused

  C. The Revislon Level configuration is inconsistent between switches

  D. Inconsistent Registry Name configuration between text exchange machines

  Correct Answer: BCD

• Question 310:

  Regarding the FTP protocol, is it correct in the description below?

  A. In ftP-style, the client completes the initialization of the TCP session for control and data

  B. In ftP Activee, the server side tells the client which port it expects to send data on by commanding "PORT"

  C. FTP always uses a TCP session to transmit control information and data information

  D. FTP always uses the TCP port to establish a data session and ICP port 21 to establish a control session

  E. FTP always uses TCP port 21 to establish a data session and TCP port 20 to establish a control session

  Correct Answer: A