Huawei Huawei Certifications H12-891 Questions & Answers

• Question 51:

  As shown in the figure, in the context of IPv4 and IPv6, the SEL field in the NET address of isis always takes a value of 00 ?

  

  A. Right

  B. Wrong

  Correct Answer: A

• Question 52:

  A bookstore provides a wired network for customers to learn online. However, one day, it was found that some users could not access the network, and after inspection, it was found that the IP resources of the DHCP address pool had been exhausted. Which of the following is the best way to solve the problem of the moment? ( Single choice questions).

  A. Configure the static ARP binding table

  B. Configure the IPSG

  C. Limits the maximum number of DHCP Snooping binding table entries that the interface allows to learn

  D. Configuration DAI

  Correct Answer: C

• Question 53:

  There are three port roles defined in RSTP, with alternative ports and backup ports flags in STP messages The port role values within the fields are consistent, all of which are 01

  A. TRUE

  B. FALSE

  Correct Answer: A

• Question 54:

  Deploying the ISIS protocol in an IPv6 environment is true in the following statement (radio).

  A. By default, the DIS priority of broadcast network interfaces at Level-1 and Level-2 is 1 B In broadcast networks, the DIS priority for IPV4 and IPV6 can be set separately

  B. In the same broadcast network. If each router supports both IPV4 and Pv6, the DISC of JPV4 and Pv6 must be the same device

  C. IS-IS sient is configured under the finger port, this interface will not send ISIS packets, but will receive ISIS packet

  Correct Answer: C

• Question 55:

  What about the description of IGMP Snooping, is it correct?

  A. IGMP Snooping solves the problem of multicast messages broadcasting in layer 3

  B. IGMP Snooping does not consume the CPU of the switch

  C. IGMP Snooping establishes a MAC multicast address table by listening for IGMP packets sent by the host

  D. IGMP Snooping runs at the link layer and is a multicast constraint mechanism on Layer 2 Ethernet switches that manages and controls multicast groups

  Correct Answer: CD

• Question 56:

  When the BFD detection intervals on both ends are 30ms and 40ms, are the following options described correctly? An A. BFD session can be established, which takes 40ms after negotiation

  A. BFD sessions can be established, each occurring at its own interval

  B. BFD sessions cannot be established

  Correct Answer: A

• Question 57:

  A routing tool can define multiple entries. Which tool will automatically add a deni-any entry at the end of the configuration?

  A. Route policy

  B. Community-tilter

  C. IP-prefix

  D. AS-path-filter

  Correct Answer: ABCD

• Question 58:

  Why is BGP an enhanced distance vector routing protocol?

  A. According to the routing rules of BGP routing, the route with lower MED is preferred

  B. BGP uses the ASPATH attribute to record all autonomous system numbers that a route passes through into an AS list, and based on that attribute, routes with shorter AS-PATH are preferred

  C. NEXT_HOP is a recognized mandatory attribute

  D. BGP cannot accept routes that carry a local AS number in the AS_PATH

  Correct Answer: B

• Question 59:

  The following about BGP routing, what is the wrong description?

  A. Non-aggregate routes take precedence over aggregate routes.

  B. In the case of PrefVal, Local_Preference equality, if the BGP preference of the locally generated route, IBGP route, EBGP route is equal, the valid reference of this generation is preceded by priority.

  C. See the following entry in the BGP routing table: ?*172 16 1. 11/32 0 00010 0? Indicates that the route is available non-optimal.

  D. For next_hop unreachable routes are invalid cat by and do not participate in the preference. Flogging case

  Correct Answer: A

• Question 60:

  Huawei's two switches SWA and SWB are connected together by 7 Ethernet cables, and static link clustering is configured, and the corresponding port on the switch SWA is Ethernet 1/0/1 ?Ethernet1/0/2? Ethernet 1/0/3?Ethernet 1/0/4?Ethernet 1/0/5, Ethernet1/0/6, Ethernet 1/0/7, configured in order of port if the switch SWA, SWB supports only 6 ports per aggregation group

  A. In the case of consistent configuration of each port, Ethernet 1/0/6 port is an aggregate group Unselected port

  B. In the case of consistent configuration of each port, the Ethernet1/0/1 port is an aggregate group Unselected port

  C. With the same configuration of each port, the Ethernet 1/0/7 port is the aggregate group Unselecte port

  D. With the same configuration of each port, SWA randomly selects one of the 7 ports as the aggregate group Unselecte port

  Correct Answer: C