Practice H12-831_V1.0-ENU Questions With Certification guide Q&A from Training Expert VCEPrep
Free Huawei H12-831_V1.0-ENU Test Practice Test Questions Exam Dumps
NEW QUESTION 130
Which of the following is wrong about DHCP Snooping?
- A. Enable the DHCP Snooping function in the interface view, then all the DHCP message command functions under the interface will take effect
- B. 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
- C. Enable DHCP Snooping globally, without any post parameters, the device only processes DHCPv4 messages by default
- D. DHCP Snooping can prevent illegal attacks by setting trusted ports (all interfaces are untrusted by default)
Answer: D
NEW QUESTION 131
What is the command to adjust the link cost value of an IS-IS interface?
- A. isis timer hello
- B. isis cost
- C. isis circuit-type
- D. isis circuit-level
Answer: B
NEW QUESTION 132
In BGPIMPLS IP VPN, if the OSPF protocol is used to exchange routing information between PE and CE, the domain identifier (Domain ID) is used to distinguish whether the routes imported in the VPI instance are from the same OSPF domain.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 133
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. The time interval of notification messages is too small
- C. Backup device interface packet loss
- D. The link that transmits VRRP notification packets flaps
Answer: A
NEW QUESTION 134
Regarding the difference between NSR and NSF, which one is correct?
- A. Both NSR and NSF need neighbor routers to complete
- B. NSR must rely on neighbor routers to complete
- C. NSF does not need neighbor routers to complete
- D. NSF must rely on neighbor routers to complete
Answer: D
NEW QUESTION 135
When MPLS is deployed in the network and the network layer protocol is IP, the route corresponding to the FEC must exist in the IP routing table of the LSR, otherwise the label forwarding entry of the FEC will not take effect.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 136
Compared with the OSPFv2 message header, what fields are added in the OSPFv3 message header?
- A. Instance ID
- B. IPV6 Router ID
- C. IPV6 Auth Type
- D. Link ID
Answer: A
NEW QUESTION 137
Which of the following are not included in the security protection actions that a secure MAC address can perform?
- A. Remark
- B. Protect
- C. Restrict
- D. Shutdown
Answer: A
NEW QUESTION 138
When deploying MPLS/BGP IP VPN, regarding the use of BGP to exchange routing information between PE-CE, which of the following description is wrong?
- A. When BGP is used to exchange routing information between PE and CE, there is no need to import BGP private network routes on PE
- B. In the case of CE multi-homing, enabling the BGP AS number replacement function may cause routing loops, which can be used to prevent routing loops in VPN sites through BGP SoD
- C. In the Hub&Spoke scenario, when Hub-CE and Hub-PE use IGP, Spoke-PE and Spoke-CE cannot enable EBGP
- D. When PE and CE use BGP to exchange routing information, if the autonomous systems of two VPN sites use the same private AS number, the AS number replacement function can be used, that is, the received AS number can be replaced with any designated AS number. The AS number in the private network route to prevent the route from being discarded due to repeated AS numbers
Answer: D
NEW QUESTION 139
Regarding the role of ping and tracert, which of the following statements is correct?
- A. Tracert must be able to trace every hop IP address from source to destination
- B. Ping detects the two-way reachability between the correct end and the one-way icmp echo request packet
- C. Tracert has the same function as ping, but the name is different
- D. Ping verifies the reachability from the local end to the opposite end, it does not mean that the opposite end is reachable from the local end
Answer: D
NEW QUESTION 140
Which packets can Huawei devices perform traffic suppression for? (Multiple choice)
- A. Unknown unicast
- B. Broadcast
- C. Known unicast
- D. Multicast
Answer: A,B,C,D
NEW QUESTION 141
. OSPFv2 is an IGP running on an IIPv4 network. OSPFV3 is an IGP running on an IPv6 network. Compared with OSPFv2, OSFv3 has similar LSA, but the function is slightly different. The following is the description of the LSA function of OSPFv3. Please drag the LSA to the correct LSA function column.
Answer:
Explanation:
NEW QUESTION 142
A router is running OSPF, and the output information is as shown in the figure. Which of the following statements is correct?
- A. The LSA in the figure is generated by this router
- B. This device is ABR
- C. The destination network described by this LSA is 10.0.23.0/24
- D. The type of the LSA is AS-externa1-LSA
Answer: C
NEW QUESTION 143
The RR rules for advertising routes break the IBGP split horizon rules, so it may cause loops in the AS.
What routing attributes does RR use to prevent loops? (Multiple choice)
- A. Cluster List
- B. Next hop
- C. Originator ID
- D. AS-PATH
Answer: A,C
NEW QUESTION 144
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
Answer: A
NEW QUESTION 145
In the intra-domain MPLS VPN network, when the data packet enters the public network and is forwarded, it will be encapsulated with two layers of MPLS labels. Regarding the description of the two layers of labels, which of the following options is wrong?
- A. By default, the outer label is singled out before the packet is forwarded to the last hop device
- B. The outer label of MPLS VPNE is called the private network label, and the inner label is called the public network label.
- C. The outer label is used to correctly send the data packet to the corresponding VPN on the PE device
- D. The outer label of MPLS VPN is allocated by the LDP protocol or statically, and the inner label is allocated by the MP-BGP neighbor at the correct end.
Answer: B
NEW QUESTION 146
When a fault occurs, the fault can be classified to reduce the scope of fault location. Which of the following is not an interface configuration fault?
- A. The duplex modes of the interfaces on both ends are inconsistent
- B. IP address conflict
- C. Inconsistent interface authentication
- D. The receiving and emitting power of both ends is inconsistent
Answer: D
NEW QUESTION 147
In the intra-domain MPLS VPN network, when the data packet enters the public network and is forwarded, it will be encapsulated with two layers of MPLS labels. Which of the following description of the two layers of labels is wrong?
- A. The outer label of MPLS VPNE is called the private network label, and the inner label is called the public network label.
- B. The outer label is used to correctly send the data packet to the corresponding VPN on the PE device
- C. By default, the outer label is ejected before the packet is forwarded to the last-hop device
- D. The outer label of MPLS VPN is allocated by the LDP protocol or statically, and the inner label is allocated by the MP-BGP neighbor at the correct end.
Answer: A
NEW QUESTION 148
A park deployed IPv6 for business testing. There are 4 routers (R1, 22, R3 and R4) in this network, running OSPFv3 to realize the interconnection of IPv6 network. There is a new router R5 that needs to be connected to the network for testing. An engineer introduced a direct route in the OSPFvV3 process of R4 to realize that the devices in the campus network can access the GE0/0/1 port address of R5. Which of the following descriptions of the scene are correct? (Multiple choice)
- A. R2 will generate a Type4 LSA describing the Router ID of R4
- B. R4 will generate an IPv6 routing prefix introduced by Type5 LSA description
- C. R4 will generate a Type5 LSA and only flood in Area 1
- D. R2 will generate a Type4 LSA and only flood in Area 0
Answer: A,B,D
NEW QUESTION 149
Regarding the site in the BGPIMPLS IP VPN network architecture. Which of the following descriptions is correct?
- A. Terminals connected to the operator's network through the same CE may belong to different sites (MCE)
- B. In any case, different sites belonging to the same VPN cannot use overlapping address spaces
- C. The two networks separated by geographical locations must belong to different sites
- D. A site is a group of IP systems, and a network formed by a host cannot be called a site
Answer: A
NEW QUESTION 150
Which of the following statements about the MP_REACH_NLRI attribute of BGP4+ is correct? (Multiple choice)
- A. The length of the next hop address can be 16 or 3
- B. The value of AFI (address family) is 2, which represents IPv6
- C. When the length of the next hop address is 16, the Network Address of Next Hop carries the link local address
- D. The NLRI field carries IPv6 routing prefix and mask information
Answer: A,B,D
NEW QUESTION 151
Part of the configuration of R1 is as follows. Which statement about OSPF on R1 is correct?
- A. The device type of R1 is Leve1-1
- B. The device type of R1 is Level-1-2
- C. The device type of R1 cannot be determined
- D. The device type of R1 is Level-2
Answer: B
NEW QUESTION 152
For the same MAC address, the priority of the manually configured MAC entry is higher than the automatically generated entry.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 153
According to this figure, it can be known that in VLAN300, 0 MAC drift occurred by 00e0-fc3d-3bdb from 17:22:38 to 17:22.44 on 2020-06-04.
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION 154
According to this picture, what can we judge? (Multiple choice)
- A. R4 belongs to Level-1 only
- B. R4 belongs to Leve1-2 only
- C. The device whose system-ID is ee8c. a0c2.baf2, and its type is Level-1-2
- D. The device with system-ID ee8a0c2.baf2, its type is Leve1-1
Answer: A,C
NEW QUESTION 155
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