[Apr-2023] H12-831-ENU Pre-Exam Practice Tests | Exam Questions and Answers for HCIP-Datacom Study Guide
HCIP-Datacom Certification Sample Questions
NEW QUESTION 141
What is the value of the linkage between OSPF and BFD?
- A. The sending interval of BFD packets can reach the millisecond level, which is slower than OSPF sensing link status
- B. The hello sending interval of OSPF is in seconds, which is faster than BFD sensing link status
- C. BFD detected at the millisecond level
- D. Any change in BFD state will not affect OSPF neighbor state
Answer: C
NEW QUESTION 142
Which of the following WAN links are part of a packet switched network? (Multiple choice)
- A. X.25
- B. ATM
- C. ISDN
- D. MSTP
- E. PSIN
Answer: A,B
NEW QUESTION 143
As shown in the figure, OSPF is enabled on all interfaces of the router. The ip address marked in the figure is the IP address of the loopback0 interface. The Loopback0 of R1, R2, and R3 is advertised in area 1, and the Loopback0 of R4 is advertised in area 0, Loopback0 of R5 announces which of the following functional addresses in area 2 can ping each other?
- A. 10.0.4.4 and 10.0.2.2
- B. 10.0.2.2 and 10.0.3.3
- C. 10.0.3.3 and 10.0.5.5
- D. 10.0.2.2 and 10.0.5.5
Answer: B
NEW QUESTION 144
What device discovery methods does Huawei eSight network management software support? (Multiple choice)
- A. Specify an IP address segment
- B. Specify an IP address
- C. Import through excel sheet (specify IP address)
- D. Specify the product model
Answer: A,B,C
NEW QUESTION 145
Which of the following sequences can be matched by the regular expression 100.S? (Multiple choice)
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B,C
NEW QUESTION 146
The output information of a router is as follows. Which of the following causes the OSPF adjacency cannot be established normally? (Multiple choice)
- A. The interval between sending Hello packets is inconsistent
- B. The IP address mask of the interface is inconsistent
- C. Inconsistent area types
- D. Inconsistent area numbers
Answer: A,D
NEW QUESTION 147
In the label forwarding table of the MPLS device, for the same route, the incoming label and the outgoing label:
- A. must be different
- B. may be the same
- C. must be the same
Answer: B
NEW QUESTION 148
MACsec can provide users with secure MAC layer data transmission and reception services.
Which of the following is not a service provided by MACsec?
- A. Controllability Check
- B. Integrity Check
- C. Data source authenticity verification
- D. User Data Encryption
Answer: A
NEW QUESTION 149
When there are multiple redundant links in an IS-IS network, multiple equal-cost routes may appear. Which of the following statements is wrong about equal-cost routing within an IS-IS network?
- A. After the equal-cost route priority is configured, when the IS-IS device forwards the traffic reaching the destination network segment, it will not adopt the load balancing method, but forward the traffic to the next hop with the highest priority
- B. A priority can be specified for each route in the equal-cost route, and the route with higher priority will be preferred. the rest as backup routes
- C. If load sharing is configured, the traffic will be evenly distributed to each link
- D. When the number of equal-cost routes in the network is greater than the number configured by the command, and these routes have the same priority, the route with the larger next-hop device System ID is preferred for load balancing.
Answer: D
NEW QUESTION 150
After a fault occurs, it is necessary to collect and backup various types of fault information in time as a reference for handling faults.
- A. False
- B. True
Answer: B
NEW QUESTION 151
In the following description, which of the following items are used to remind customers of information security? (Multiple choice)
- A. Data backup reminder
- B. Account sorting reminder
- C. Password update reminder
- D. Log Protection Reminders
Answer: A,B,C,D
NEW QUESTION 152
The security protection actions that can be performed by a secure MAC address do not include which of the following?
- A. Shutdown
- B. Protect
- C. Restrict
- D. Remark
Answer: D
NEW QUESTION 153
RR rules for advertising routes violate the rules of IBGP split horizon, so it may cause loops in the AS. What routing attributes does RR use to prevent loops? (Multiple choice)
- A. Cluster List
- B. Nexthop
- C. Originator ID
- D. AS-PATH
Answer: A,C
NEW QUESTION 154
MPLS is called multi-protocol label switching. Regarding the label description in MPLS, which of the following is correct? (Multiple choice)
- A. The label is carried by the header of the MPLS packet and has global significance, that is, the label value of all routers cannot be repeated
- B. MPLS supports single-layer labels as well as multi-layer labels
- C. The label is a fixed-length identifier with only local significance, which is used to uniquely identify the FEC to which a packet belongs
- D. The MPLS system has multiple label distribution protocols, such as LDP, which is a label distribution protocol.
Answer: B,C,D
NEW QUESTION 155
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-way devices, which of the following statements is false?
- A. If the Update packet carries the AP REACH NLRI attribute, it means that the advertisement is a reachable route
- B. When routing is delivered, the Next Hop attribute must be an IPv6 global unicast address
- C. BGP4+ transmits routing information between peers through Update packets
- D. Route transmission will carry recognized mandatory attributes such as AS Path
Answer: B
NEW QUESTION 156
Regarding the sham link, which of the following descriptions is wrong?
- A. Sham link can be configured in any area, it needs to be configured manually, and there must be a route to the destination address of the sham link (the sham link endpoint address of the peer PE) in the local VPN instance
- B. A sham link is a link between two VPN instances, and each VPN instance must have an endpoint address of the sham link, which must be a Loopback with a 32-bit mask in the VPN address space on the PE router interface address
- C. In order to forward the VPN flow through the MPLS backbone network, the routing cost of the sham link should be less than the OSPF routing cost of the backdoor road
- D. The endpoint address of the sham link is published by BGP as a VPNv4 address. Routes that have passed through the sham link can also be imported into BGP in the form of VPNv4 routes.
Answer: D
NEW QUESTION 157
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 158
Which of the following statements are correct about delay and jitter? (Multiple choice)
- A. Business interruption time is greatly reduced
- B. Simplify network management and reduce the complexity of network deployment planning
- C. Can effectively reduce network power consumption
- D. Improve utilization of network devices and links
Answer: A,B,D
NEW QUESTION 159
As shown in the figure, an engineer uses 4 routers to test branch network interoperability. Among them, R1, R2, and R3 in branch 1 deploy OSPF to realize network interoperability. R2, R3, and R4 in branch 2 deploy IS-IS to realize network intercommunication.
Now the engineer wants to implement R1 to access the loopback interface address of R4. Which of the following operations can meet this requirement?
- A. No configuration required
- B. In the OSFF process and the IS-IS process of R2, the default route is advertised respectively
- C. Advertise the default route only in the OSPF process of R2
- D. Advertise the default route only in the IS-IS process of R2
Answer: B
NEW QUESTION 160
OSPFv2 is an IGP that runs on IPv4 networks. OSPFV3 is an IGP running on IPv6 networks. Compared with OSPFv2, OSPFv3 has similar LSAs, but has slightly different functions.
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 161
The packet filtering firewall provides support for detecting fragmented packets. What are the fragmented packets that the packet filtering firewall can filter? (Multiple choice)
- A. Non-fragmented packets
- B. The first fragmented packet
- C. Subsequent fragmented packets
- D. Forged ICMP error message
Answer: A,C
NEW QUESTION 162
Which of the following is not a preliminary preparation for the cutover plan?
- A. Field Defence
- B. Cutover target
- C. Risk Assessment
- D. Existing network root description
Answer: A
NEW QUESTION 163
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