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Sample Questions
H12-891_V1.0 Sample Question 1
Regarding the domain-authentication-mode md5 hello command in the ISIS process, the correct explanation is ?
A. ISIS authentication cannot be applied in IPv6 environments.
B. This command is mainly used to make is the ISIS Hello message carry authentication information during the transmission process.
C. All router domain authentication methods of the same routing domain are MD5, the password is hello, and lS-IS SNP and LSP will spread normally.
D. outing domain authentication is primarily used to allow level-1 and Level-2 SNP and LSP messages to carry authentication information during delivery.
ANSWER : C
H12-891_V1.0 Sample Question 2
As shown in the figure, all routers run OSPF, which is correct in the following statement:
A. Both R2 and Zone 0 generate Router LSA
B. R2 generates Router LSA only in Zone 0
C. R2 forwards the R1-generated Router LSA to R3
D. R2 Forwards the R3-generated Router LSA to R1
ANSWER : A
H12-891_V1.0 Sample Question 3
A. Detection time for BFD packets for AR2 800ms
B. R1 Detection time for BFD packets for 1280ms
C. R1 Detection time for BFD packets The detection time for BFD packets for 660ms
D. R2 is 600ms
ANSWER : C
H12-891_V1.0 Sample Question 4
Which of the following attacks are DoS (Denial of servioe) attacks?( Multiple choice question)
A. Single packet attack
B. Source P address spoofing attack
C. Man-in-the-middle attack
D. Flood Attack
ANSWER : A,D
H12-891_V1.0 Sample Question 5
SNMPv3 defines which security features
A. Privacy
B. Authentication
C. Domain checking
D. Accounting
ANSWER : A,B
H12-891_V1.0 Sample Question 6
Which of the following statement about isis protocol route aggregation is correct?
A. Route aggregation can be configured and takes effect on all types of routers
B. Route aggregation can only take effect if configured on Leve-1 port routers
C. Route aggregation can only be configured on Leve-2 routers to take effect
D. Route aggregation can only be configured on Leve-1-2 routers to take effect with
ANSWER : A
H12-891_V1.0 Sample Question 7
The following description of the process of sending and receiving data frames in switch interface Access mode is correct? ( Single choice questions).
A. In Access mode, labeled data frames are discarded directly when they are received.
B. Access mode strips off the VLAN tag of the dataton when sending .
C. Access mode receives only unlabeled data frames.
D. When a data frame enters the switch interface, the switch learns the destination MAC address in the data frame.
ANSWER : B
H12-891_V1.0 Sample Question 8
The following description of the characteristics of cross-domain VN-Optionc is correct?
A. A maximum of two layers of tags need to be used in the message forwarding process.
B. VPMV4 routes are not saved on the ASBR, and VPNv routes are not advertised to each other.
C. VPN routes are exchanged directly between the ingress PE and egress PE and do not require an intermediate device to secure a circular VPN route.
D. Cross-domain VN-Optionc, which is not suitable for use when spanning multiple AS.
ANSWER : B,C
H12-891_V1.0 Sample Question 9
ipv6 link-local addresses can be generated through stateless autoconfiguration
A. TRUE
B. FALSE
ANSWER : B
H12-891_V1.0 Sample Question 10
Regarding the MPLS basic forwarding process, the following description is incorrect? Radio
A. By default, the PHP-enabled Erass node assigns a label value of 3 to the inverted second-hop node.
B. When an IP message enters the MPLS domain, the MPLS boundary device inserts a new label between the layer 2 header and the IP header.
C. When the P message enters the MPLS domain, check whether the Tunel lD value corresponding to the destination IP address is Ox0O If the Tunel IlD value is Ox0 Then enter the MPLS forwarding process.
D. The transport node device replaces the existing top-of-stack label (outermost label) with the label assigned by the next hop device.
ANSWER : C
H12-891_V1.0 Sample Question 11
Mainstream Layer 2 tunneling technologies include VXLAN TRILL, NVGB and MPLS.
A. FALSE
B. TRUE
ANSWER : A
H12-891_V1.0 Sample Question 12
A. rule permit ip source 1921681.10 destination 1921681.20
B. rule permit ip source 101.1.0000255 destination 1921681.20
C. rule permit ip source 101.1.0000255 destination 101.20000255
D. rule permit ip source 1921681.10 destination 101. 20000255
E. rule permit ip source 101.20 000255 destination 101.1.0000255
ANSWER : C
H12-891_V1.0 Sample Question 13
Huawei's SDN controller using VXLAN technology is fixed?
A. Agile Controller-Campus
B. Agile Controller-WAN
C. Agile Controller-DCN
ANSWER : C
H12-891_V1.0 Sample Question 14
The following statement about EVPN Type5 routing is wrong?( Single choice questions).
A. Type5 routes carry Layer 3 VNI.
B. Type5 routing carries both Layer 2 VWI and Layer 3 VNI
C. The IP Prefix field can carry both host and network segment addresses.
D. Type5 is an IP prefix route.
ANSWER : B
H12-891_V1.0 Sample Question 15
The correct description of the extended features of ISIS is ?
A. When the amount of information in the Link State Protocol data packet PDU to be released by ISIS is too large, the ISIS router will generate multiple LSP shards to carry more ISIS information.
B. ISIS can choose whether to authenticate incoming SNP and LSP packets
C. If there are other vendors' devices on the network and do not support the LSP sharding function, the sharding expansion mode must be configured as Model-1, otherwise the message will not be recognized by other vendors' devices.
D. After you enable the LSP shard extension feature of your router, you can use it without restarting the ISIS process.
ANSWER : A,B,C
H12-891_V1.0 Sample Question 16
In MPLSVPN, in order to distinguish between IPv4 prefixes that use the same address space, the RD value is added to the IPv4 address, and the following options are described correctly as ?
A. RD can be used to control the publication of VPN routing information
B. On a PE device, each VPN instance corresponds to an RD value, and the RD value must be unique on the same PE device
C. RD is encapsulated in the Update message as an extended community attribute of BGP during delivery
D. After the PE receives an IPv4 route from CE, it adds an RD to the route to IPv4 that translates to a globally unique VPN-IPv4 route and publishes it on the public network
ANSWER : B
H12-891_V1.0 Sample Question 17
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
ANSWER : A,B,C
H12-891_V1.0 Sample Question 18
RTA is the source DR router, RTB is the RP router, and the multicast source sends multicast data to the RTA, but the PIM is not visible on the RTB Register the multicast source to which the message is registered, then the possible causes are ?
A. Multicast network statically configures RP, while RTA router does not statically configure RP
B. The RP elected by RTA is not an RTB
C. RTB to RTA has no unicast routing, causing the RTB to fail RPF checks for the source
D. The multicast network dynamically elects the RP instead RTA failed RPF check for BSR
ANSWER : A,B,C,D
H12-891_V1.0 Sample Question 19
Regarding Route Policy, is the following description correct?
A. Advanced ACLs can be applied in route-policy to filter routes
B. The table entries pernit::0 Less an equal 128 indicate that all IPV6 routes are allowed through
C. If more than one node is defined in Route one policy, there should be at least one node in each node that matches permit
D. Route one policy filters only the default route
ANSWER : B,C,D
H12-891_V1.0 Sample Question 20
In an Hw IP multicast network—which of the following multicast features are associated with (*, G) table entries? ( Multiple select)
A. Dense mode
B. Source tree
C. Sparse mode
D. PIM bidirectional E. Share the tree
E. Dense Tree
ANSWER : C,D,E
H12-891_V1.0 Sample Question 21
During the LDPsession setup process, the active party first sends the Illitalization information to negotiate the parameters, and if the passive party does not accept the negotiation parameters, which of the following messages will be sent? <(Single select).)
A. Hello Message
B. Error Notification Message
C. Keepalive Message
D. Initialization Message
ANSWER : B
H12-891_V1.0 Sample Question 22
The duplicate address detection feature for NDP in the following description is incorrect?
A. IPv6 unicast address is called a tentative address after it is assigned to an interface and before it is detected by duplicate addresses
B. Duplicate address detection is implemented via RS and RA messages
C. IPv6 duplicate address detection technology is similar to free ARP in IPv4
D. The interface needs to perform duplicate address detection before enabling any of the unicast IPv6 addresses
ANSWER : B
H12-891_V1.0 Sample Question 23
If all the public IP addresses are used by a company's intranet users to access the Internet using NAT's No-pat method, what will happen to subsequent intranet users who access the Internet?
A. automatically switch NAT to PAT after the Internet
B. Subsequent intranet users will not be able to access the Internet
C. Synchronize messages to other NAT conversion devices for NAT conversion
D. Squeeze out the previous user and force NAT conversion to go online
ANSWER : B
H12-891_V1.0 Sample Question 24
In order to reduce the number of OSPF routes in some unscheduled areas, the OSPF protocol has developed special area functions, and the following characteristic description of ospf special areas is correct?( Single choice questions).
A. ASBR-Sunmary-LSA is allowed to be published to NSSA regions
B. AS-External-LSA is allowed to be published to Stub regions
C. Any OSPF zone can be configured as a special zone
D. Special area routers cannot establish OSPF neighbor relationships with regular area routers
ANSWER : D
H12-891_V1.0 Sample Question 25
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
ANSWER : B,C
H12-891_V1.0 Sample Question 26
Which of the following parameters should be modified to re-establish the is-IS neighbor relationship?
A. Modify the Cost value of the IS-IS interface
B. Modify the send interval for the IlH of the IS-IS interface
C. Modify the Level of the IS-IS interface
D. Modify the IP address of the IS-IS interface
ANSWER : C,D
H12-891_V1.0 Sample Question 27
If there are multiple recipients in a multicast group, the administrator enables the IGMPSnooping function on the switch connecting the recipient, and when the receiver receives the universal group query packet of the queryer from the switch, how should multiple recipients respond?
A. The first recipient whose response time time expires sends the Report message, the other receivers do not.
B. All recipients will respond to Report messages only if ICMPV2 is running.
C. All recipients will respond to the Report message only if IGMPvl is running.
D. All recipients will respond to the Report message
ANSWER : B