New H12-221_V2.5-ENU HCIP-Routing & Switching V2.5 Exam Dumps Questions

1. Since the attribute AS-PATH cannot work well in the AS, it is stipulated that BGP routers will not announce any update information from IBGP peers to its IBGP peers.

2. Inject the BGP route by redistributing the command, and its ORIGIN attribute is INCOMPLETE.

3. AS (AUTONOMOUS SYSTEM) refers to a group of routers that are defined independently by users and use a unified routing strategy.

4. The master-slave relationship of OSPF neighbors is negotiated through DD packets.

5. IGMPv1 only contains two message types: membership query and membership report.

6. When two routers establish a logical BGP peer through multiple physical links, the peer connect-interface command must be used.

7. For link state routing protocols, filtering routes in the inbound direction can actually block the transmission of link state information. The effect of filtering is that the route cannot be added to the local routing table, and its neighbors cannot receive the complete Route status information.

8. In the OSPF routing protocol, the LSA types involved in the calculation of intra-area routes are only Router-LSA, Network-LSA and Summary LSA.

9. When two routers exchange database information through DD messages, a master-slave relationship is first formed, the one with the larger ROUTER ID must be the master, and the slave bit is determined to be MS.

10. LS Sequence Number is used to detect expired and repeated LSA. It is a 32-bit signed integer, so the largest LS SEQUENCE NUMBER is 0X7FFFFFFF.

11. In the same LAN, if some IGMP V1 routers exist in the LAN, then IGMP V1 must be configured for all routers in the subnet for normal use.

12. The access control list (acl) is the order of matching rules, which can be matched regardless of the order in which the user configures the ACL rules.

13. On non-broadcast networks, OSPF has two modes of operation, non-broadcast multiple access and point-to-multipoint. Non-broadcast multiple access requires DR/BDR election.

14. By default in the VRP version, when the route-policy of a BGP neighbor is changed, it will automatically send a REFRESH to the neighbor to request the neighbor to resend the UPDATE message.

15. In the BGP routing rules, the route with the higher MED value is preferred.

16. Multiple BGP processes cannot be configured on a router.

17. In the MSTP protocol, each MST INSTANCE uses the RSTP algorithm separately to calculate a separate spanning tree.

18. The OSPF NBMA network type requires that the routers in the network must select DR and BDR, or they cannot work.

19. IS-IS routers with an interface priority of 0 cannot participate in the DIS election.

20. The IP-Prefix can be used for routing information filtering.

21. The ABR in the OSPF complete STUB area does not flood the third, fourth, and fifth type LSAs into the area. Therefore, the ABR in the complete STUB area needs to manually delegate a default route to the area to guide how data packets reach the outside destination of the AS.

22. IGMP Snooping runs at the data link layer, used to manage, and control multicast groups, and solve the problem of multicast packets broadcast at the third layer.

23. When the BGP versions supported by two BGP neighbors are inconsistent, the neighbors will negotiate to use the highest BGP version that both ends can support.

24. Every DD message has a DD sequence number, which is used for the confirmation mechanism of the DD message. DD contains complete link status information.

25. By default, the OSPF port cost is related to the port bandwidth. The calculation formula is: BANDWIDTH-REFERENCE/BANDWIDTH. The port cost can only be calculated by OSPF and cannot be changed manually.

26. Port isolation can isolate the communication between different ports in the same VALN of the same switch.

27. OSPF supports multi-process, multiple different OSPF processes can run on the same router, they do not affect each other and are independent of each other. The routing interaction between different OSPF processes is equivalent to the routing interaction between different routing protocols.

28. The import-route limit command cannot limit the maximum number of external routes that can be imported in an OSPF process.

29. By default in VRP, when the route-policy of a BGP neighbor is changed, manual operations are required to re-send the UPDATE information to the neighbor.

30. In OSPF, the DR and BDR elected in the broadcast type network listen to both the 240.0.0.5 address and the 24.0.0.6 address.

31. The function of routing protocol priority is to assign different priorities to the routes discovered by different protocols, so that when a router learns the same route from different routing protocols at the same time, it can have a priority order of selection.

32. By default, VRP automatically aggregates routes imported by BGP.

33. OSPF divides the boundary of the area on the router.

34. The ABR in the OSPF STUB area does not flood Type 5 LSA, Type 4 LSA, and Type 3 LSA into the STUB area. Therefore, the STUB area does not have AS external routing capabilities. The ABR in the STUB area advertises a default route to the area, guiding to send to destination outside the AS.

35. OSPF runs directly on top of the TCP protocol, using TCP port number 179.

36. If the Router Priority is set to 0, then in the OSPF routing domain, the router is allowed to be elected as DR or BDR, but with the lowest priority.

37. There can be multiple nodes under one ROUTE-POLICY, different node numbers are identified by sec-number, and the relationship between the various parts of different seq-numbers is an "or" relationship.

38. Different network types of the OSPF protocol can form an adjacency in the FULL state.

39. Using default routing between routers is a low-cost solution, but requires more system resources than a complete routing table.

40. The AS border router can be an internal router IR or ABR, and must belong to the backbone area.

41. The default value of the OSPF DR-PRIORITY command is 1, and the value range is 0-255.

42. BGP neighbors establish neighbor relationships through UDP.

43. In order to avoid inter-area loops, OSPF stipulates that it is not allowed to advertise routing information directly between two non-backbone areas. It is only allowed to advertise routing information within an area or between a backbone area and a non-backbone area. Therefore, each area border router (ABR) must be connected to the backbone area.

44. Unicast technology and multicast technology have different advantages in solving the problem of single-point sending and multi-point receiving.

45. Every router running OSPF has a ROUTER ID, which must be published in OSPF.

46. In the OSPF routing domain, a broadcast network and an NBMA network containing at least two routers must designate one router as DR and the other as BDR.

47. On the VRP platform, when we introduce OSPF or ISIS routing to RIP, if the COST is not specified, the cost value will be set to 16.

48. By default, in order to successfully transfer routing information to IBGP peers, the BGP Speaker must establish IBGP connections with other BGP peers to form an IBGP full interconnection within the AS.

49. When the Hold Time parameter negotiated by two BGP neighbors is 0, the Keeplive message is not sent.

50. In the ospf routing protocol, the unit of the bandwidth-reference command is mbps.

51. In OSPF broadcast or NBMA network types, devices with a large ROUTER PRIORITY may not necessarily become DR.

52. On the broadcast or nbma network, not all neighbors will establish adjacency.

53. The OSPF vlink-peer command is used to configure a virtual connection, which specifies the router-id of the peer.

54. The matching order of the access control list is divided into two types: configuration order and automatic sorting.

55. When the Hold Time supported by two BGP neighbors are inconsistent, the neighbors will negotiate to adopt the lowest Hold Time interval that both ends can support.

56. In the OSPF routing protocol, under the same other conditions, the Type 2 of external route always takes precedence over the Type 1 of external route.

57. In the OSPF protocol, it is not possible to judge the newness of the same LSA based on LS SEQUENCE NUMBER and LS AGE alone.

58. When different routing protocols are used in unused networks, and these networks need to share routing information, you can set up route import. In BGP, routes can only be imported through the network.

59. In the BGP routing rules, the route with the higher LOCAL_PREF value takes precedence.

60. In the routing rules of BGP, the priority of the manually aggregated route generated by the AGGREGATE command is higher than the automatically aggregated route generated by the SUMMARY AUTOMATIC command.

61. Two level-1 routers in different areas can form a neighbor relationship.

62. The active tree uses the shortest path from the multicast source to the receiver, so it is called the shortest path tree SPTA.

63. The first 4BIT of the IP multicast address is a fixed 1110, corresponding to the high 25BIT of the multicast MAC address. Only 23BIT of the last 28BIT of the IP multicast address is mapped to the MAC address, so the address information of 5BIT is lost. The direct result is that there are 32 IP multicast addresses mapped to the same MAC address.

64. In a network running STP, a variety of topology change information will be sent when the network topology changes. How many types of topology change information are defined in the RSTP network?

65. The state where no connection is established between BGP neighbors and no attempt is made to establish a connection is:

66. In the RSTP protocol, the uplink port of a non-root switch has a port identification parameter. This port identification consists of two parts, namely:

67. Which of the following is a feature of OSPF stub area?

68. Which of the following description is wrong about the OSPF protocol?

69. As shown in the figure below, if you want employees of department A to not communicate with each other, employees of department B can communicate with each other, but different departments cannot communicate with each other, and all employees can access the company's server through MUX VLAN. To achieve this function, which of the following statement is correct?

70. When a router running OSPF receives an LSA, and the LSA does not exist in its link state database, how will the router handle this LSA?

71. Regarding the distribution tree, which of the following description is correct? (Multiple Choice)

72. Regarding the LSA of all kinds of message, which of the following description is wrong?

73. Which of the following reasons can cause the BGP neighbor relationship to fail to be established?

74. When using manual link aggregation mode, which of the following description regarding adding member interfaces is wrong?

75. Regarding the static LACP mode, which of the following statement is wrong?

76. MUX VLAN provides a mechanism for network resource control through VLAN. Which of the following concepts do not belong to MUX VLAN?

77. In the process of BGP establishing a neighbor, when TCP cannot be successfully established, what is the status of the neighbor?

78. MSTP solves many shortcomings of the single spanning tree of RSTP and STP. Regarding the MSTP, which of the following description is correct?

79. When a router running BGP receives a route with an unreachable next hop, how to deal with it?

80. In the broadcast network, what mechanism does the IS-IS protocol use to ensure the reliability of neighbor relationship establishment?

81. In a broadcast type network, what is the default time interval for DIS to send HELLO?

82. Which of the following types of LSA can carry TAG information for external routes?

83. With regard to the Stub area, the correct understanding of the Stub area and NSSA is:

84. Which of the following descriptions about MUX VLAN is wrong?

85. Regarding the description of OSPF route aggregation, which of the following is wrong?

86. The following is a partial configuration of a router. Which part of the configuration description is correct?

ip IP- prefix pl permit 10.0. 192.0 8 greater-equal 17 less-equal 18

87. The following is about the ROUTER-LSA connection type (Type), which of the following description is wrong?

88. Although the STP protocol can solve the loop problem, the slow convergence of the network topology affects the quality of user communication. RSTP has made many improvements to STP. Which of the following is not an improvement of RSTP to STP?

89. About information description of ASBR-Summary-LSA of OSPF, which of the following statement is wrong?

90. Regarding the description of OSPF external routing types, which is wrong?

91. The following is part of the information output by the router Huawei. Which of the following description of this part of information is wrong?

92. Regarding the cost value (Cost) of the routing protocol, which of the following description is incorrect?

93. By default, the SSM group range is 232.0.0.0/8. If you want to modify the SSM group range, which of the following configurations is correct?

94. What is the wrong description of the LSA header information in the AS-External-LSA of OSPF?

95. Which of the following description of EGP and IGP is wrong

96. Which of the following description of Local-Preference is correct?

97. Which of the following about the description of OSPF features is wrong?

98. How does the COMMUNITY attribute of the route set by the routing strategy affect the route selection?

99. Which of the following description of OSPF message verification is wrong?

100. About the warning information "OSPF/2/IFAUTFAIL (OID) [1.3.6.1.2.1.14.16.2.6]:

A packet is received on a non-virtual interface from a router whose authentication key or authentication type conflicts with the local authenctication key or authenctication type. (IfIpAddress=[ip-address], AddressLessIf=[interface-index], ProcessId= [process -id], RouterId=[router-id], PacketSrc=[source-ip-address], ConfigErrorType=[error-type], PacketType=[packet-type], InstanceName=[instance-name])"

Which of the following description is wrong?