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Updated Jan-2022 Pass H12-261-ENU Exam - Real Practice Test Questions
NEW QUESTION 55
Between the two directly connected devices that have established IBGP neighbors, run the shutdown command to shut down the interface of one of the devices. The BGP connection will not be disconnected immediately.
- A. True
- B. False
Answer: A
NEW QUESTION 56
When judging the old and new LSA, the serial number parameter and the age parameter will be used. Which of the following statements about the two parameters is correct?
- A. When the router receives two LSAs, the serial number is the same, the checksum is the same, and the smaller the age, the better.
- B. If the serial number of the LSA reaches the end value of 0x7FFF, the current router advertises the age is lsa of 3600s.
- C. Both the serial number and the age parameter can judge the LSA is old or new, and the router preferentially compares the sequence parameters, the larger the better.
- D. When the router receives an LSA age is 360s, the LSA is unavailable.
Answer: C
NEW QUESTION 57
The router HW1 exists as an MPLS LSR router in the network of the operator HW. The router receives a packet carrying a label, but the label entry does not exist in its LFIB.
So how does the router handle the message?
- A. Router HW1 will strip the label and find the IP destination address of the FIB.
- B. Router HW1 uses LDP to create an LSP and creates a new path for the label carried in the packet in the LFIB.
- C. Router HW1 will forward the message using the default label.
- D. Router HW1 will discard the message.
Answer: D
NEW QUESTION 58
Which AS_PATH can the command ip as-path-filter1 permit^12*74$ match?
- A. AS PATH(1253287423)
- B. AS PATH(32127423)
- C. AS PATH(321122374)
- D. AS PATH(1236217432374)
Answer: D
NEW QUESTION 59
Which of the following tools cannot be directly referenced by the If-match clause in the Route-policy?
- A. AS-path-filter
- B. IP-prefix
- C. Community-filt
- D. Regular expression
Answer: D
NEW QUESTION 60
The Type 5 LSA in OSPF is used to pass external routes. Which of the following statement about the five Type 5 LSA is wrong?
- A. Configure the corresponding policies on the ABR and ASBR to filter the Type 5 LSA.
- B. The router in the same area as the ASBR can calculate the external route through the intra-area LSA and the Type 5 LSA.
- C. The Type 5 LSA is advertised by the ASBR and flooded in the OSPF network in the non-Stub/NSSA area.
- D. The FA address is included in the Type 5 LSA, and the FA address is 0.0.0.0, but has no practical effect as a reservation.
Answer: D
NEW QUESTION 61
Which of the following description about the OSPF virtual link is true?
- A. A virtual connection can be established in any area, and itself belongs to the area after it is established.
- B. The virtual link uses the outbound interface P as the link address.
- C. The virtual link can be used to solve the problem that area 0 is divided.
- D. The cost of the virtual link is the optimal link.
Answer: C
NEW QUESTION 62
A home user has opened a 10Mb/s broadband. To improve the user experience, the operator can stabilize at 12Mb/s when performing speed measurement. If we use token bucket technology to achieve this demand, which of the following is the best?
- A. cir 10000 cbs 12000 pbs 12000
- B. cir 10000 pir 12000
- C. cir 10000 cbs 10000 pbs 12000
- D. cir 8000 pir 12000
Answer: B
NEW QUESTION 63
Command ip ip-prefix ip-prefix-name [index index-number] { permit | deny } ipv4-address mask-length [ match-network ] [ greater-equal greater-equal-value ] [ less-equal less- Equal-value ] is used to configure ip-prefix-. If 1ess -equal- of a prefix list has been specified, but greater-equal4- is not specified, what is the range of the prefix?
- A. [0, less-equal-value]
- B. No restrictions
- C. [mask-length, less-equal-value]
- D. [less-equal-value,32]
Answer: C
NEW QUESTION 64
The multicast IP address is 229.130.130.1, and what is its corresponding MAC address?
- A. 00-00-5E-82-82-01
- B. 01-00-5E-02-82-01
- C. 00-00-5E-02-82-01
- D. 01-00-5E-82-82-01
Answer: B
NEW QUESTION 65
Which of the following is correct about the ISIS LSP fragmentation extension?
- A. ISIS fragmentation extensions are achieved by adding virtual systems, which can be expanded to a maximum of 1000 virtual systems.
- B. Enable the ISIS router to generate more LSP fragments to carry more ISIS information.
- C. ISIS fragmentation extensions are equally valid for Hello packets.
- D. The maximum number of fragments that an ISIS router can generate is 1024.
Answer: B
NEW QUESTION 66
The following is about the LDP protocol session establishment process, which is the correct description? (Multiple Choice)
- A. After the TCP connection is successfully established, the active party sends an initialization message to negotiate the parameters related to the LDP session.
- B. The Hello message discovered by the LDP neighbor uses TCP packets. The destination address is the multicast address 224.0.0.2.
- C. After both parties receive the Keepalive message from the peer, the LDP session is established successfully.
- D. The party with the larger transmission address acts as the active party and initiates the establishment of TCP connection.
Answer: A,C,D
NEW QUESTION 67
Which of the following statements about the VXLAN gateway are wrong?
- A. The third layer gateway of VXLAN can be divided into centralized gateway and distributed gateway.
- B. The third layer gateway of VXLAN allows inter-subnet VXLAN communications and external network access.
- C. VXLAN Layer 2 gateway is bound to the VPN instance.
- D. The second layer gateway of VXLAN allows tenant access XLAN, and used to communicate between the subnets in the same VLAN.
Answer: C
NEW QUESTION 68
Regarding the Stub area and the NSSA area of the OSPF protocol, which of the following statement is incorrect?
- A. Both the Stub area and the NSSA area are not allowed to inject Type 4 LSA.
- B. Type 5 LSA is not allowed in the Stub area, and Type 5 LSA is allowed in the NSSA area.
- C. Both the Stub area and the NSSA area can inject Type 3 LSAs.
- D. Type7 LSA is not allowed in the Stub area, and Type 7 LSA is allowed in the NSSA area.
Answer: B
NEW QUESTION 69
Which of the following types of packets is required to implement virtual machine migration in a BGP EVPN distributed gateway scenario?
- A. Type3
- B. Type1
- C. Type4
- D. Type5
- E. Type2
Answer: E
NEW QUESTION 70
Which of the following operations can implement fast fault detection on multicast network? (Multiple choice)
- A. Reduce the interval for sending Join/Prune messages.
- B. Establishing PIM BFD session between neighbors
- C. Reduce the interval at which the interface sends Hello messages.
- D. Shorten the Holdtime of Join/Prune messages
Answer: B,C
NEW QUESTION 71
Which of the following description about LDP reliability is incorrect?
- A. The manually configured LDP FRR policy defaults to a 32-bit backup route that triggers LDP to establish a backup LSP.
- B. The association between the LDP and the IGP requires the IGP to suppress the advertisement of the route and ensure that the LDP path is consistent with the IGP path.
- C. LDP FRR can also be used to generate an LSP for the label mapping from the non-optimal next hop. And it can be a backup of the main LSP, to establish the forwarding entries.
- D. LDP GR (Graceful Restart) uses the feature that MPLS forwarding plane is separated from the control plane to ensure that the device does not interrupt forwarding during protocol restart or active/standby switchover.
Answer: A
NEW QUESTION 72
Regarding route introduction, which of the following description is wrong?
- A. bgp supports both import and network when generating routes. Network mode is more accurate.
- B. By default, the default metric of the external route redistributed by OSPF is 1, and the imported external route type is Type2.
- C. Introducing IBGP routes in OSPF may cause routing loops.
- D. After the ISIS level-2 network route is imported to the level-1 route, the routing loop is formed if the import policy is not manually configured.
Answer: D
NEW QUESTION 73
Network administrators can use CAR technology in traffic policing. Which of the following technologies can be applied in CAR?
- A. Double barrel single speed
- B. Three barrels single speed
- C. Single barrel single speed
- D. Double barrel double speed
Answer: A,C,D
NEW QUESTION 74
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