[May 29, 2022] Latest Questions H12-831_V1.0-ENU Guide to Prepare Free Practice Tests
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NEW QUESTION 124
Regarding BGP/MPLS IPVPN routing interaction, which of the following descriptions is wrong?
- A. After the egress PE receives the VPNv4 route advertised by the ingress PE, it filters the VPNv4 route according to the RT attribute carried by the route
- B. The ingress PE changes the IPv4 route received from CE to VPNv4 route, and saves it according to different VPN instances
- C. The exchange between PE and CE is IPv4 routing information
- D. The egress PE can send IPv4 routes to the remote CE through BGP, IGP or static routing
Answer: D
NEW QUESTION 125
Which of the following are advantages of VLAN aggregation?
- A. accomplishSub-VLANIsolation between broadcast domains
- B. added availableM LANquantity
- C. decreasedIPwaste of address
- D. Increased addressing flexibility
Answer: A,C
NEW QUESTION 126
Which of the following community attributes can ensure that the propagation scope of BGP routing entries is only within the AS?
- A. No_Advertise
- B. Internet
- C. No_Export_Subconfed
- D. No_Export
Answer: C,D
NEW QUESTION 127
From this picture, we can judge
- A. R1does not have3002:3/128and3002.-4/128routing
- B. R1have3002.-3/128and3002:.4/128routing
- C. If not configured aboutAS_Pashrouting strategy, then3002:4/28must have originated from AS 65001
- D. If not configured aboutAS_Pathrouting strategy, then3002:-4/128 -must not originate from AS 65001
Answer: B,C
NEW QUESTION 128
When troubleshooting dual-master faults in a VRRP backup group, which of the following statements is wrong?
- A. Need to check whether the interface IP address is in the same network segment
- B. Need to check whether the VRRP group ID on the interface is the same
- C. Need to check whether the virtual IP addresses of the VRRP group are the same
- D. There is no need to check whether the switch port that transmits the VRRP advertisement message is in the same VLAN
Answer: D
NEW QUESTION 129
From this figure, it can be known that
- A. R1no access172.17.1.5routing
- B. R1have access172.17.1 5routing
- C. R1access172.17.1.5There is a loop
- D. R1access172.17.1.5There is no problem with the path
Answer: B,C
NEW QUESTION 130
Configure ipv6 preference in IS-IS protocol view. The function of this command is to configure the preference of IPv6 routes generated by lS-Is protocol.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 131
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.
The neighbor relationship has been established. How many routing entries are there in the BGP routing table of Client2 ultimately?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION 132
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?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION 133
The IS-IS neighbor between R3 and R1 is not established. According to the information in this figure, what is the possible cause?
- A. The lS-Level of R3 and R1 do not match
- B. The System ID of R3 and R1 are duplicated
- C. The circuit-type of the interconnection interface between R3 and R1 does not match
- D. The IIH certification of R3 and R1 failed
Answer: D
NEW QUESTION 134
What is wrong with this configuration description is:
[Huawei]dhcp enable
[Huaweijinte GigabitEthernet 0/0/1 [Huawei-GigabitEthernet0/0/1 ]dhcp option82 insert en [Huawei-GigabitEthernet0/0/1 ]dhcp snooping enable [Huawei-GigabitEthernet0/0/1]dhcp snooping trusted
- A. ifGigabitEthemnetOIO/1received by the interfaceDHCPIn the request message, there is noOption82of SutOptioninformation, the device will generateOption82,and insert it into the message
- B. turn onDHCP Snoopingconfiguration can be used to preventDHCP ServerCounterfeiter Attack
- C. configureGigabitEthernetO/0/lThe interface is a trusted interface
- D. turn onDHCP Snoopingconfiguration can be used to preventARPspoofing attack
Answer: D
NEW QUESTION 135
The rollback operation of project cutover can be temporarily determined according to the situation during cutover, and no advance plan is required.
- A. False
- B. True
Answer: A
NEW QUESTION 136
An engineer uses two routers to test IPv6 services, and simulates the interconnection between the headquarters and branches by running BGP4+. The logical topology of the network is shown in the figure. Regarding the transmission of IPv6 routes between the two devices, which of the following Is a statement wrong?
- A. When the route is transmitted, it will carry recognized mandatory attributes such as AS_Path
- B. BGP4+ transmits routing information between peers through Update packets
- C. If the MP_REA, CH_NLRI attribute is carried in the Update packet, it indicates that the advertisement is a reachable route
- D. The Next_Hop attribute must be an IPv6 global unicast address when routing
Answer: D
NEW QUESTION 137
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?
- A. The IP address mask of the interface is not-consistent
- B. Regional type is not-consistent
- C. The interval for sending Hello messages is not-consistent
- D. Authentication password is not-consistent
Answer: A
NEW QUESTION 138
Which of the following tools cannot be used to match BGP routing entries?
- A. IP Prefix List
- B. Community Filter
- C. Advanced ACL
- D. Basic ACL
Answer: C
NEW QUESTION 139
Which of the following is wrong about DHCP Snooping?
- A. Enable DHCP Snooping globally, without any post parameters, the device only processes DHCPv4 messages by default
- B. DHCP Snooping can prevent illegal attacks by setting trusted ports (all interfaces are untrusted by default)
- C. 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
- D. Enable the DHCP Snooping function in the interface view, then all the DHCP message command functions under the interface will take effect
Answer: B
NEW QUESTION 140
OSPFv2 is an IGP running on an IPv4 network, OSPFvV3 is an ICP running on an IPv6 network. OSPFv3 and OSPFv2 have the same message types, including Hallo messages, DD messages, LSU messages, LSU messages and SACK messages.
Regarding OSPFv3 packets, which of the following statements is correct?
- A. The He11o packet of OSPFv3 carries the IPv6 address prefix list of the router interface
- B. OSPFv3 uses the link-local address as the source address of the sent message, and the message can be forwarded outside the range of the originating link
- C. OSPFv3 uses IPv6 multicast addresses FFO2::5 and FFO2:.6 to send OSPFv3 packets
- D. OSPFv3 uses the authentication field in the header of the message to complete message authentication
Answer: C
NEW QUESTION 141
Which of the following functions will affect the establishment of BGP neighbors? (Multiple choice)
- A. BGP authentication
- B. BGP route filtering
- C. BGP GSTM
- D. ebgp max hop
Answer: A,C,D
NEW QUESTION 142
A router Network LSA is shown in the figure. Which of the following statements is correct? (Multiple choice)
- A. The DR priority of the router is 100
- B. The network segment where the router is located is 10.0.12.0 24
- C. This router is DR
- D. The Router ID of this router is 10.0.12.2
Answer: B,C,D
NEW QUESTION 143
OSPFV2 is an IGP running on an IPv4 network; OSPFV3 is an IGPo running on an IPv6 network. The basic working mechanism of OSPFv3 is the same as that of OSPFV2, such as the election of DR and B, DR. As shown in the figure, an engineer uses 3 routers to test IPv6 services. He wants to realize the interconnection of IPv6 networks by running OSPFV3.
Pass. Which of the following statements about the election of the network DR is correct?
- A. After the network convergesR1Power off and restart, when the network converges again,R3forDR
- B. After the network converges, engineers modifyR1the priority is100,R2the priority is10,R3Keep the default value. When the network converges again,R1forDR, R2forB, DR
- C. After the network converges, a new device is added to the broadcast linkR4,R4the priority is150. When the network converges again,R4forDR
- D. After the network converges,R1forDR
Answer: A
NEW QUESTION 144
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