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H12-831 by Huawei - Page 1 | ExamCademy

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When troubleshooting the EBGP neighbor relationship, you found that two directly connected devices use Loopback ports to establish a connection, so execute display current-configuration configuration bgp to view the configuration of peer ebgp-max-hop hop-count. Which of the following statements is correct?

A hop-count must be greater than 2
B hop-count must be greater than 15
C hop-count must be greater than 1
D hop-count must be greater than 255

An enterprise purchased the leased lines of two operators. In order to optimize the route, the enterprise used the 6GP protocol to learn routing entries of the two operators. However, the company found that after such a configuration, the traffic of the export routing increased greatly. After the network engineering investigation, it was found that the traffic of the two operators was passed to each other through the company's export router.

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Therefore, the company intends to use routing strategies to prevent the traffic between different operators from passing each other. Is the configuration in the figure correct?

A TRUE
B FALSE

Which of the following statements about IS-IS (IPv6) is correct? (Choose three.)

A To support the processing and calculation of IPv6 routing, IS-IS added NLPID to 129 TLV
B IS-IS working at the data link layer only needs to add a new TLV to support Pv6
C To support the processing and calculation of IPv6 routes, IS-IS has added TLV232236
D By default, IS-IS enables the multi-topology feature

In OSPF, ABR will convert all Type 7 LSAs in the NSSA area into Type 5 LSAs.

A TRUE
B FALSE

Which of the following regarding the configuration description is wrong?

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A If the DHCP request message received by the GigabitEthemnet0/0/1 interface does not contain the SutOption information of Option82, the device will generate Option82 and insert it into the message
B Enabling the DHCP Snooping configuration can be used to prevent DHCP Server counterfeiters from attacking
C Configure GigabitEthernet0/0/1 as a trusted interface
D Enabling the DHCP Snooping configuration can be used to prevent ARP spoofing attacks

Regarding MP-BGP, which of the following description is incorrect?

A When the PE and CE exchange routes through BGP, you need to create a BGP process for each VPN instance on the CE
B MP-BGP's message type and VPNv4 routing policy are the same as BGP-4
C MP-BGP needs to assign private network labels to VPNv4 routes
D MP-BGP advertises VPNv4 routes through two attributes: MP_REACH_NLRI and MP_UREACH_NLRI

Regarding the cause of the dual-master failure of the VRRP backup group, which of the following is the most unlikely?

A The link that transmits the VRRP notification message is faulty
B The low-priority VRRP backup group discards the received VRRP notification packets as illegal packets
C The VRRP backup group IDs on both ends are different
D Master device sends 1 notification message per second

Configure under a certain interface: isis timer hello 5 leve1-2, which of the following statements is correct?

A The interval for sending Level-2 hello packets on this interface is 5s
B The hello packet sending interval of Level-1 and Leval-2 of this interface is 3s.
C The interval for sending Level-2 CSNP packets of this interface is 5s
D The interval for sending Level-1 hello packets on this interface is 5s

Which of the following is wrong about DHCP Snooping?

A DHCP Snooping can prevent illegal attacks by setting trusted ports (all interfaces are untrusted by default)
B Enable DHCP Snooping globally, without any post parameters, the device only processes DHCPv4 messages by default
C Enable the DHCP Snooping function in the interface view, then all the DHCP message command functions under the interface will take effect
D Enable the DHCP Snooping function in the VLAN view, and the command function of DHCP messages belonging to the VLAN received by all interfaces of the device will take effect

Regarding the IPSG, which of the following statement is incorrect?

A IPSG can prevent IP address spoofing attacks
B IPSG is a source IP address filtering technology based on the three-layer interface
C IPSG can turn on the IP packet inspection and alarm function, and cooperate with the network management to perform alarms
D IPSG can prevent the host from changing the IP address privately

As shown in the figure, Site1 and Site2 need to achieve mutual access through the operator's BGP/MPLS IPVPN. It is known that the public network tunnel between PE1 and PE2 has been established (the label information is shown in the figure), and PF1 has advertised the 192.168.1.0/24 network segment route in Site1 to PE2 through the MP.JIBGP neighbor relationship, and the route learning is normal.

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When capturing the data that Site2 visits the 192.168.1.0/24 of Site1 between P and PE1, what should be the outermost label?

A 6661
B 3
C 6662
D 8888

The network administrator A wants to use ACL to match only the four routing entries 1, 3.5, and 7 in the figure. How many ACL rules does the network administrator A need to configure at least?

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A 2
B 1
C 4
D 3

As shown in the figure, Client1 and Client2 act as clients of RR1 and RR2 at the same time, RR1 and RR2 are in the same Cluster, and R has introduced 10 routes. Assume that the BCP configuration is correct.

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The neighbor relationship has been established. How many routing entries are there in the BGP routing table of Client2 ultimately?

A 10
B 20
C 0
D 15

Part of the configuration of R1 is as follows. Which statement about OSPF on R1 is correct?

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A The device type of R1 is Level-2
B The device type of R1 cannot be determined
C The device type of R1 is Leve1-1
D The device type of R1 is Level-1-2

As shown in the figure, all interfaces of the router enable OSPF, among which R4 and R5 can establish OSPF virtual connections.

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A TRUE
B FALSE

What is the flooding scope in OSPFv3 for the LSA in the entire autonomous system?

A Link-LSA
B As-external-LSA
C Inter-Area-Prefix-LSA
D Intra-Area-Prefix-LSA

According to this picture, we can judge:

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A The system ID of R1 is ee8c.a0c2.bafl
B R1 has both leve1-1 and level-1-2 link state information
C R1 only has link state information for leve1-2
D In the leve1-2 network, there are a total of 8 routers

The routing attributes of the three routing entries are shown in the figure. Assuming that the next hop of the three routing entries are all reachable, when the three routing entries arrive at the BP router in sequence, by default, BGP will finally select one route entry?

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A Route B
B Route C
C Route A

IPSG is a source IP address filtering technology based on Layer 3 interfaces. It prevents malicious hosts from forging authorized hosts' IP addresses to access authorized network resources.

A TRUE
B FALSE

Which of the following will not cause the VRRP backup group to oscillate?

A The VRRP backup group preemption delay configuration on both ends is inconsistent
B Backup device interface packet loss
C The time interval of notification messages is too small
D The link that transmits VRRP notification packets flaps

In order to speed up the perception of link failures in the IS-IS network, IS-IS can be linked with BFD.

A TRUE
B FALSE

Which of the following are not included in the security protection actions that a secure MAC address can perform?

A Protect
B Restrict
C Shutdown
D Remark

An engineer uses two routers to test IPv6 services, and simulates the interconnection between the headquarters and branches by running BGP4+. As shown in the figure, an engineer captures the packet to view the update message sent by R1.

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Regarding the description of the message information, which of the following statements is correct?

A The next-hop address of the route described in this message is: 2001:db8::2345:1.:1
B The message describes the currently revoked IPv6 route
C The routing address prefix and its prefix length described in this message are: 2001:db8:2345:1::1/128/
D The route described in the message may be imported through import

As shown in the figure, a certain park has deployed IPv6 for service testing, and there are 4 routers in the network. Run OSPFv3 to realize network interconnection.

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Regarding the LSA generated by the OSPFv3 network, which of the following statements is wrong?

A R1 itself will generate Router-LSA to describe device interface information, and will receive Router-LSA generated by R2 and R3 at the same time
B There is a Network LSA generated by R3 in the LSDB of R1, indicating that R3 may be the DR of this link
C R1 will receive the two Link-LSAs generated by R2, describing the two links information connected to The safer, easier way to help you pass any IT exams. 4 / 86 R2 respectively
D As an ABR, R2 will generate Inter-Area-Prefix-LSA describing the IPv6 address prefix of Area 1, and advertise it to R1 and R3

A network engineer outputs the following information when troubleshooting OSPF. Based on this, determine which reason causes the adjacency relationship to fail to be established normally?

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A Authentication password is not-consistent
B Regional type is not-consistent
C The interval for sending Hello messages is not-consistent
D The IP address mask of the interface is not-consistent

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