Huawei Huawei Certifications H12-891 Questions & Answers

• Question 571:

  Protocols with TCP ports 443, 179, 137, 110, and 23 are, in order: radio

  A. Finger,DHCP Server,NetBios Name Server,POP3,TelnetB

  B. LDAP,SNMP,TFTP,POP3,Telnet

  C. HTTPS,SNMP,POP3,DNS ,Telnet

  D. HiPS,BGP, NetBios Name Server ,POP3,TelnetE. BGP,POP3,SNMP,TFTP,Teinet

  Correct Answer: D

• Question 572:

  The following statement about IS-IS (IPv6) is correct?

  A. In order to support the processing and calculation of IPv6 routes, IS-IS has added TLV232 and 236

  B. By default, IS-IS has the multi-topology feature turned on

  C. IS-IS works at the data link layer and only needs to add a new TLV to support IPv6

  D. In order to support the processing and calculation of IPv6 routes, IS-IS has added NLPID to the 129 TLV

  Correct Answer: ACD

• Question 573:

  The following description of the TTL in the MPLS Header is correct:

  A. A TTL that acts like an IP header and is used to prevent message loops

  B. To control label distribution

  C. Limit LSR

  D. Control of upstream devices for label distribution

  Correct Answer: A

• Question 574:

  What are the following correct statements about MUX VLANs?( Multiple select).

  A. The Principal VLAN can communicate with all VLANs within the MUX VLAN

  B. Each Separate VLAN must be bound to a Principal VLAN

  C. Separate VLANs can communicate with all VLANs within a MUX VLAN

  D. Each Group VLAN must be bound to a Principal VLAN

  Correct Answer: ABD

• Question 575:

  What is the wrong description of the function of OSPFv3 protocol authentication?

  A. OSPFv3 can only establish a security alliance SA using manual mode

  B. Huawei router OSPFv3 IPSec authentication can not only support transmission mode, but also support tunnel mode

  C. OSPFv3 authentication relies on IPv6 packet authentication headers and encapsulation security net load headers

  D. The OSPFv3 protocol header removes the Type and Automation fields

  Correct Answer: B

• Question 576:

  A home user has opened a 1Mb/s bandwidth, and in order to improve the user experience, the operator can stabilize 2Mb/s when measuring speed If we use the listening bucket technology to achieve this requirement, which of the following methods is optimal.

  A. cir 10000 pir 12000

  B. cir 10o00 cbs 12000 pbd 12000

  C. cir 8000 pir 12000

  D. cir 10000 cbs 10000 pbs 12000

  Correct Answer: A

• Question 577:

  The following about BGP routing, describing the error, is?

  A. Non-aggregate routes take precedence over aggregate routes

  B. In PrefVal, Local_ Preference is equal to the case if the route is generated locally, IBGP Routing, the BGP preference for EBGP routing, is generated effectively referring to route priority.

  C. See the following entry in the BGP routing table:* 172161.11/32 000010 0? Indicates that the route is available non-optimal

  D. For next_hop unreachable routes when invalid routes, do not participate in the preferred.

  Correct Answer: A

• Question 578:

  The switch can suppress traffic by suppressing traffic and extremely other failures can affect operations, which of the following traffic suppression configurations is the wrong configuration

  

  A. [Quidway] wan 10 [Quidway-wan10] multicast-suppression 1000 [Quidway-van10] quit

  B. [Qudway ineface gigabtethemnet /0'1 [Quidway-GigabitEfthemetO0/O/1]multicast-suppression 80TQuidway- GigabitEthernet0/0/1]quit

  C. Quidway inteface gigabiethenet ou0/1 [Quidway-GigabtEthernet/0/1J,broadcast-suppression 80 IQuidway-GigabitEthernet//1]Jqut

  D. [Quidway] icmp rate-limit enable [Quidway] icmp rate-limit total threshold 20

  E. [Quidway ] wan 10 [Quidway-wani0] broadcast-suppression 1000 [Quidway-van10] quit

  Correct Answer: A

• Question 579:

  The following description of the characteristics of multi-instance CE is ?

  A. Since the MCE device is already bound to the VPN, there is no need to bind the VPN on the PE connected to the MCE device

  B. The MCE device can determine the source of the routing information according to the interface that receives the routing information, and maintain it in the route forwarding table of the corresponding VP.

  C. MCE is implemented by creating their own routing forwarding tables for different VPNs on the MCE device and binding to the corresponding interface o

  D. Configuring MCE enables a CE to connect to multiple VPNs at the same time, which can not only completely isolate the service between different VPN users, but also reduce the input cost of network equipment.

  Correct Answer: A

• Question 580:

  When a Layer 3 switch sends IP packets originating from one VLAN to another LAN, which field in the following options is overridden?( Single choice questions).

  A. Three layers of TTL

  B. Layer 3 destination address

  C. Layer 3 source address

  D. Layer 3 Transport Protocol

  E. Two-tier TTL

  Correct Answer: A