Free HCIP-Datacom H12-831_V1.0-ENU Ultimate Study Guide (Updated 258 Questions)
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NEW QUESTION 39
The OSPF protocol runs between CE and PE, when CE1 advertises the route of the site to CE2. Which of the following description is wrong?
- A. When PE2 receives the same Domain ID as the local BGP route sent by PE1, for Type3 LSA, PE2 will generate Type5 LSA
- B. The Domain ID configured by PE1 can be used as an extended community attribute of BGP and sent along with the route to PE2.
- C. When PE2 receives the same Domain ID as the local BGP route sent by PE1, PE2 will generate Type3 LSA for Type1 LSA and Type2 LSA
- D. When PE2 receives a BGP route from PE1 that carries a different Domain ID from the local one, it is correct for all LSAs, and PE2 will generate Type5 LSA or Type7 LSA
Answer: A
NEW QUESTION 40
What is the purpose of configuring LSP fragmentation for IS-IS equipment?
- A. Make the device unable to learn IS-IS routing information
- B. Allow the device to support more IS-IS routing entries
- C. Make the device unable to establish IS-IS neighbors
- D. No practical purpose
Answer: B
NEW QUESTION 41
In an MPLS network, there are different types of operations for labels, among which the meaning of the "pop" action is?
- A. Replace the top label with another set of labels
- B. Add the top label to the MPLS label stack
- C. Remove the top label from the MPLS label stack
- D. Replace the top label with another value
Answer: C
NEW QUESTION 42
As shown in the figure, all routers run OSPF.
Which of the following statements is correct?
- A. R2 forwards the Router LSA generated by R1 to R3
- B. R2 only generates Router LSA in area 0
- C. R2 generates Router LSA in both area 1 and area 0
- D. R2 forwards the Router LSA generated by R3 to R1
Answer: C
NEW QUESTION 43
In the VLAN aggregation technology, multiple Sub-VLANs are used to isolate the wide recruitment area, and these Sub-VLANs are aggregated into a logical Super-VLAN. A company divides different departments into different Sub-VLANs because of the Sub-VLAN. VLAN not only includes physical connections, but also can establish a three-layer VLANIF interface, which can directly communicate with the external network on the three-layer.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 44
MPLS has always been slower than IP forwarding.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 45
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 46
Which of the following functions will affect BGP neighbor establishment? (Multiple choice)
- A. BGP route filtering
- B. BGP authentication
- C. ebgp max hop
- D. BGP GSTM
Answer: B,C,D
NEW QUESTION 47
What types of Link Types are included in the Router LSA in OSPF? (Multiple choice)
- A. Vlink
- B. TransNet
- C. StubNet
- D. P-2-P
Answer: A,B,C,D
NEW QUESTION 48
Which of the following is not a hardware preparation item for cutover?
- A. Device version check
- B. Cable connectivity test
- C. Power-on test
- D. Test the operation of the board
Answer: A
NEW QUESTION 49
As shown in the figure, all routers run OSPF, because R3 is in the backbone area, so there is no type 3 LSA in the LSDB of R3.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 50
OSPFv2 is an IGP running on an IPv4 network; OSPFv3 is an IGP running on an IPv6 network. The basic working mechanism of OSPFv3 is the same as OSPFv2, such as the election of DR and BDR. As shown in the figure, an engineer uses three routers to test IPv6 services. He wants to realize the interconnection and interoperability of IPv6 networks by running OSPFv3.
Which of the following statements regarding the election of DR on this network is correct?
- A. After the network converges, R1 is the DR
- B. After the network converges, a new device R4 is added to the broadcast link, and the priority of R4 is 150. When the network converges again, R4 is the DR
- C. After the network converges, the engineer changes the priority of R1 to 100, the priority of R2 to 10, and the default value of R3. When the network converges again, R1 is DR and R2 is BDR
- D. After the network converges, R1 is powered off and restarted. When the network converges again, R3 is the DR
Answer: D
NEW QUESTION 51
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 52
ping -a X-c Y-s z -vpn-instance M 10.5.16.2, what is the meaning of this command? (Multiple choice)
- A. The source IFP address of the ping packet is X
- B. The ICMP request of the ping, the packet size is Z (excluding IP and ICMP header)
- C. The ping packet belongs to VPN instance M
- D. The ping sends Y ICMP requests
Answer: A,B,C,D
NEW QUESTION 53
In a multi-level RR scenario, a large number of second-level RR are connected to the first-level RR, which may cause the BGP routing table of the first-level RR to overflow. What method can be used to reduce the risk of overflow of the BGP routing table of the first-level RR?
- A. Set the same Cluster-lD
- B. Routing control
- C. Route aggregation
- D. ORF
Answer: C
NEW QUESTION 54
BGP routing strategy can control the distribution and reception of routes.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 55
(Connection question) Please correspond the alarm level with the importance of the fault and the countermeasures. (Multiple choice)
Answer:
Explanation:
NEW QUESTION 56
IEIF has extended the functions of OSPF by taking advantage of the strong scalability of OSPF. To enable it to support IPv6 networks, the expanded protocol is called OSPFv3, and OSPFv3 is compatible with OSPFv2.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 57
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 58
The output information of a router is as follows. Which of the following reasons cause the OSPF adjacency relationship to fail to be established normally? (Multiple choice)
- A. The interval for sending Hello packets is inconsistent
- B. The IP address mask of the interface is inconsistent
- C. Inconsistent area codes
- D. Inconsistent area types
Answer: A,C
NEW QUESTION 59
As shown in the figure, the carrier BGP/MPLS IP VPN backbone network constructs SP through DP. If you want to realize the intercommunication between the two sites of user X through the BGP/MPLS IPVPN network, the 32bit mask of Loopback interface address must be used between PE1 and PE2 to establish the MP-IBGP peer relationship.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 60
To ensure security, authentication can be configured in the OSPFv3 process area view.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 61
As shown in the figure, the cost value of the link that all interfaces of the router enable DSPF is identified in the figure.
The Loopback D interface of R2 is advertised in area 1. Then the cost value of R1 to 10.2/32 is:
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION 62
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 63
Which of the following aspects should be considered in the cutover risk assessment? (Multiple choice)
- A. Scope of risk impact
- B. Location of key risk points
- C. Time of risk impact
- D. Loss caused by risk
Answer: A,B,C,D
NEW QUESTION 64
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