H12-891 Online Practice Questions and Answers

How do 8021w and 8021D handle BPDUs?( Confirmed) The

A. 8021D bridge only forwards BPDU packets received from the root bridge

B. The 8021D bridge does not forward BPDU messages

C. The 8021w bridge forwards only BPDU packets received from the root bridge

D. 8021w Bridge does not forward BPDU packet

What improvements have been made to the IGMPv2 protocol compared to IGMPv1? ( Multiple Choice)

A. Added maximum response time field

B. Added high group messages

C. Added specific group query message

D. Added a specific source group query packet

Which of the following options is correct?

A. Unicast and broadcasting cannot effectively achieve data transmission between one source and multiple destinations on P2MP, but multicast technology can

B. Multicast technology is able to reduce redundant traffic, so network bandwidth can be saved C. Multicast technology is used for "-to-many" applications

C. Since multicast is based on TCP to establish a connection, multicast technology can ensure the reliable transmission of data

If a Huawei switch runs the RSTP protocol, when will the BPDUs on a port on the switch be aged?

A. On the interface, RSTP does not age BPDU

B. After more than 6 seconds

C. After Ma ge times out

D. After Hello time times out

E. after the Forward Delay timeout

An existing router running BGP, HW1, has both IBGP neighbors and EBGP neighbors configured on the router. Are the IP Neighbors and EBGP Neighbors described below correctly?

A. The router will be connected directly from its EBGP IBGP neighbor, otherwise, IBGP- Multi-hop must be configured

B. The router sends BGP updates learned from its EBGP neighbors to its other IBGP neighbors and EBGP neighbors

C. IBGP neighbors can establish neighbor relationships through Loopback engagements

D. The router sends BGP updates learned from its IBGP neighbors to its other IBGP neighbors and EPGP neighbors

E. EBGP neighbors must be directly connected, otherwise, EBGP-Multi-hop must configure

As shown in the figure, private network routing information is exchanged between PEl and PE2 and their respective CE via OSPF, and the same is configured on PEI and PE2 Domain D. When routing is introduced from BGP to OS9PF on PE2, the following limited types of LSAs may be passed to E2?

A. Type7 LSA

B. Type5 LSA

C. Type3 LSA

D. Type1 LSA

The command to configure VRRP preemption delay is ?

A. vrrp vrid 1 preempt-mode timer delay 20

B. vrrp vrid 1 preempt-delay 20

C. vrrp vrid 1 preempt-timer 20

D. vrrp vrid 1 timer delay 20

In an MPLS VPN network, different CE devices exchange routing information with the same PE device using different routing protocols, and different CE devices use routing protocols that are independent of each other

A. True

B. False

The following is correct about the LSA of OSPFv3

A. The Link State ID of inter-area prefix-SA, which contains prefix information

B. Router-LSA and Network-LSA do not contain routing information

C. When the Referenced Link State Type-2 of the Intra-AreaPrefixLSA, referenced Link State ID Contains the interface ID of the DR

D. Inter-Area PrefirLSA also contains LinkLocal Information

If you have a Huawei switch running the STP protocol, and now connect the GO/O/17 interface and the GO/O/18 interface of the switch through a cable, then the scenario described below is correct ?( Single choice questions).

A. Both the G0/0/17 interface and the GO/0/18 interface enter the Forwarding state

B. Both the Go/0/17 interface and the G0/0/18 interface enter the Disccarding state

C. The Go/0/17 interface enters the Blocking state

D. The GO/0/18 interface will continuously change back and forth between the Listening state and the Learning state

E. GO/0/18 interface will enter the Disking state