Test: _8_2_1_Indu_5 de 60 preguntas (Historia - Cultura General - eso - geografía


_8_2_1_Indu_5 de 60 preguntasVersion en ligne _8_2_1_Indu_5 de 60 preguntas par VaContra mx 1 1. BFD control packets are encapsulated in UDP packets for transmission. What is the destination port number of multi-hop BFD control packets? a 4784 b 3784 c 5784 d 2784 2 In the OSPF protocol, inter-area route calculation involves only Router LSA, Network LSA, and Summary LSA. a TRUE b FALSE 3 3. Which of the following statements regarding OSPF route summarization is false? a OSPF supports two route summarization modes: ABR summarization and ASBR summarization. b Any router in OSPF can summarize routes. c Route summarization is the process of summarizing routes with the same prefix into one route and then advertising only the summarized route to other areas d Route summarization can reduce routing information, decrease the routing table size, and improve router performance. 4 4. As shown in the following figure, a new AP is deployed In dual link MSB networking (load Question No : 1 Question No : 2 Question No : 3 Question No : 4 Huawei H12-821_V1.0 2 balancing mode). Which AC will the connect to? a AC1 b Ramdom access c None d AC2 5 5. Which of the following is the default interval at which the DIS on a broadcast IS_IS network sends CSNPs. a 30 b 3.3 c 10 d 40 6 6. To inject IGP routes into BGP routes, you can only use the network command. a TRUE b FALSE 7 7. Which of the following statement regarding the display ospf peer command output is true? a Address: 10.1,1.1 Indicates that the local interface address is 10.1.1.1. b Through negotiation during DD packet exchange, the local end becomes the slave. c Router ID indicates that the local router ID Is 10.1.1.1. d The DR address is 10.1.1.1 8 8.A switch runs MSTP. The configuration is shown in the figure. What is the role of this switch in MSTI 1? a Uncertain b Root switch c Non-root switch d Secondary root switch 9 9. The filter-policy 2000 export command is run in an ISIS process. Which of the following statements about the functions of a filter policy is false? a Is used together with the route import function to advertise some imported external routes to neighbors b If this command is not run, the device by default advertises all routes that ISIS Imports form external routing protocols. c Controls the advertisement of routes generated by the device d Filters LSPs to be advertised. 10 10. To prevent inter-area routing loops, OSPF does not allow advertising routing information between two non-backbone areas and allows sing routing information only within an area or between the backbone area and a non-backbone area. Therefore, each ABR must be connected to the backbone area. a True b False 11 11. Which of the following statements regarding DR/BDR are false? a In a broadcast network, DR and BDR must be elected. A broadcast network without a DR or BDR cannot operate normally b DR others listen on the multicast address 224.0.0.5. c All DR others establish neighbor relationships with DR and BDR only. d DR others listen on the network address 224.0.0.6. 12 12. There are two BFD operating modes. In_______mode, the local end sends BFD Control packets at specified intervals, and the remote end checks whether the local end periodically sends BFD Control packets a primary 13 13. Which of the following statements regarding the firewall zone security level is false? a The configured security level cannot be changed. b Two zones cannot be configured with the same security level. c The default security level of the new zone is 1. d Only the security level of the user-defined zone can be configured. 14 14. Which of the following PIM protocol packets have unicast destination addresses. a Register Stop b Bootstrap c Graft d Assert 15 Which of the following statements regarding the LSA age field are true? a The unit of this field is seconds. In a LSDB, the LS age of a LSA increases with time. b If the LS age of a LSA has reached the LSRefreshTime (30 minutes), any router can regenerate an instance of this LSA again. c The unit of this field is seconds. In a LSDB, the LS age of a LSA decreases with time d If the LS age of a LSA has reached the LSRefreshTime (30 minutes), the originator of this LSA needs to regenerate an instance of this LSA again. 16 16. The traffic limiting policy feature only supports the number of connections initiated by the specified IP or the number of connections received. a True b FALSE 17 17. Which Of the following IEEE 802.11 standards is also known as Wi-Fi 6? a 802.11ac b 802.11n c 802.11ax d 802.11b 18 18. ON a stateful inspection Firewall where there is no session table, when the status detection mechanism is enabled and the second packet (CYN+ACK) of 3-way hadshakes reaches the firewall. Which of the following statements is true? a If the firewall security policy permits packets to pass, the session table is created b By default, when status detection is disabled and the permit policy is configured packets can pass. c Packets must pass the firewall, and a session table is established. d If the firewall security policy permits packets to pass, the packets can pass the firewall. 19 Which of the following statements regarding the BGP error display of a router false? a The error may be caused by the incorrect neighbor address. b The neighbor address of this router is 10.1.1.5. c Error Type indicates that the BGP error is caused by the neighbor relationship error. d The error occurred at 12:40:39 on March 22, 2010. 20 A monitoring plane usually comprises the monitoring units of main control boards and interface boards. This plane can monitor the system environment independently. Which of the following environment monitoring functions can be provided by the monitoring plane? a Voltage monitoring b Temperature monitoring c Fan control d System power-on and power-off control 21 What parameters can a DHCP6 server assign to a DHCPv6 client? a Gateway address b DNS server address c IPV6 address/prefix d SNTP server address 22 Compress the 2001:0DBB:B8:0000:C030:0000:0000:09A0:CDEF address.___________(if the answer contains letters, capitalize them.) a pending 23 When two routers exchange LSDB information using DD packets, a master/slave relationship is formed first, the router with a larger router ID is the master, and determine the MS bit. a True b False 24 The Interface \P address and VRRP virtual IP address can be the same a True b False 25 25. Regarding the route-policy set-cost configuration below, which of the following statements is true? a b The route 11.1.0.0/16 is permitted by node 10, and its tost Is set to 300. c The cost of all routes is set to 200. d All the routes that are not permitted by node 10 will be denied. e The route 11.1.0.0/16 will continue to match node 20 after permitted by node 10, and (he final cost is set to 200. 26 26. Which of the following attacks is not the network layer attack? a IP spoofing attack b ICMP attack c Smurf attack d ARP spoofing attack 27 27. IGMPV3 not only supports IGMPv1 General Query and IGMPv2 Group-Specific Query, and also IGMPv3 Source/Group-Specific Query a True b False 28 28. Four routers run ISIS and have established adjacencies. The area IDs and router levels are marked in the following figure. If route leaking is configured on R3, which of the following is the cost of the route from R4 to 10.0.2.2/32? a 80 b 50 c 40 d 30 29 Which of the following statements about multicast packet forwarding is true? a If a multicast data packet fails the RPF check, the packet must have been received through a sub-optimal interface. However, this interface still receives and forwards the multicast traffic downstream. b IGMP snooping cannot control the scope of multicast traffic flooding on a Layer 2 network. c The source address of a multicast packet is a unicast address d In multicast transmission, the destination address of a packet can be the unicast address of a host. 30 30. Which of the following statements about the forwarding plane of a switch is false? a Provides high-speed and non-blocking data channels b Can encapsulate and decapsulate packets c Can collect packet statistics d Consists of main control boards and interface boards 31 31. Which of the following statements regarding IGMPv1 and IGMPv2 are true? a 1GMPv2 supports only general query. b 1GMPv2 defines the Leave message type c IGMPv1 does not define the IGMP Leave message type d IGMPv1 supports general query. 32 Which of the following statements regarding the stateful inspection firewall is true? a When the stateful inspection firewall checks packets, packets of one same connection are not correlated. b Because UDP is a connectionless protocol, so the stateful inspection firewall cannot match UDP packets with the status table. c The stateful inspection firewall only needs to match the first data packet against a rule, and the subsequent packets of the connection are matched directly in the state table. d The stateful inspection firewall needs to match the rules for each incoming packet. 33 What is the correct procedure for a VLAN pool to assign terminals to VLANs. a 34 34. Huawei firewall by default creates security zones named untrust, dmz, _________ and local. (Use Lowercase letters.) a security policy 35 35. Which of the following statements regarding BGP route advertisement are false? a All the BGP routes learned from all BGP peer will be advertised to other BGP peers. b Only the optimal routes preferred by BGP can be advertised to other BGP peers. c By default, the routes learned from an IBGP peer will not be forwarded to other IBGP peers. d Only the routes learned from IGPs can be advertised to other BGP peers. 36 36. An engineer sets the CAPWAP heartbeat detection interval to 20 of the active link before an active/standby switchover occurs? a 75s b 20s c 60s d 90s 37 37. Which of the following statements regarding an IP prefix are true? a An IP prefix filter is used to filter IP address prefixes and cannot match an IP prefix number and a prefix length at the same time. b An IP prefix filter cannot be used to filter data packets c An IP prefix filter is used to filter IP address prefixes and can match an IP prefix number and a prefix length at the same time d An IP prefix filter can be used to filter data packets 38 38. Which of the following statements regarding different LSA types is false? a LS Request packets contain only LS Type, LS ID, and Advertising Router. b LS Ack packets contain complete LSA information c DD packets contain only LSA summary information, including LS Type, LS ID, Advertising Router, and LS Sequence Number. d LS Update packets contain complete LSA information. 39 39. Which of the following routing protocols support the default route through command configuration? a BGP b IS-IS c OSPF d ICMP 40 40. Preferences of routing protocols determine the sequence In which a router selects a route among routes to the same destination /earned through different routing protocols. a True b False 41 41. See the following figure. RTA, RTB, RTC, and RTD are in the same AS and establish IBGP peer relationships through direct links. RTB an RTC are route reflectors (RRs), RTA and RTC are the RR clients of RTB, and RTB and RTD are the RR clients of RTC. If RTA advertises the route 10.1.1.0/24 to the BGP process, the Originator ID of the BGP route received by RTD is------------------. a IN ORDER 42 42. Which of the following configurations are not mandatory when an administrator configures VRRP? a Preemption mode b Preemption delay c Virtual router priority d Virtual IP address 43 OSPF supports area authentication and interface authentication. If both authentication modes are configured, Interface authentication takes preference over area authentication. a True b False 44 44. As shown in the figure, SWA, SWB, SWC, and SWD run the Rapid Spanning Tree Protocol (RSTP). Which of the following statements are true? a Once receiving OPOUs, the edge port re-partlci pates in the calculation of the spanning tree. b After a port is Configured as an edge port, the port can quickly enter the Forwarding state. c You can enable the edge port on SWD's GEO/0/2 connected to the terminal so that this port can quickly enter the Forwarding state d You can enable the edge port on SWC's GE0/0/2 connected to the terminal so that this port can quickly enter the forwarding state. 45 45. Which of the following attribute must be carried in an Update message? a Local-pref b Prefval c MED d AS-Path 46 46. Compared with STP, RSTP defines the different port states. Which of the following statements regarding discarding and learning states are true? a The port In discarding or learning state does not forward data frames. b The port in discarding state does not learn MAC addresses table. c The port in discarding or learning state does not learn MAC addresses d The port In learning stole docs not learn MAC addresses table. 47 47. Drag the following VRRP states to the corresponding working mechanisms. a 48 48. After which of the following parameters are modified does an IS-IS neighbor relationship need to re-established? a The cost of an IS-IS interface is changed b The IP address of an ISIS interface is changed. c The level of an ISIS interface is changed. d The interval at which an IS-IS interface sends IIH packets is changed. 49 49. In BGP, the origin attribute of the routes imported using the import-route command is incomplete. a True b False 50 50. Which of the following statements is false, based on the following IGMP information on an interface of RTA? a The interval for sending group-specific Query messages is 60s. b The maximum time for response to Query messages is 10s c The IP address of the interface is 192.168.1.1. d The IGMP version is IGMPV2 51 51. In a route-policy, which of the following BGP attributes can be used in apply clauses? (A,B,D) Escoge una o varias respuestas a A. MED b B. AS_Path c C. Tag d D. Local-Preference 52 If a router ID is configured in both the system via and the BGP view, BGP uses the router ID configured in the BGP view because the BGP view takes precedence over the system view. a TRUE b FALSE 53 53. Which of the following statements regarding the summary automatic command and BGP route summarization is false? a After this command is configured, BGP sends only the summarized routes to peers b This command is used to implement automatic summarization. Automatic summarization takes precedence over manual summarization c This command enables automatic summarization for the locally imported routes d After this command is configured, BGP summarizes routes based on natural network segments 54 54. Which of the following statements about WLAN roaming are true? a APs for roaming do not need to have overlapping signal coverage b APs for roaming must be in the same extended service set (ESS). c APs for roaming must have overlapping signal coverage d APs for roaming must be in the same basic service set (BSS). 55 55. A local router runs IS-IS and its command output is shown in the following figure. Which of the following statements is true? a The circuit level of S4/0/0 is Level-1. b S4/0/0 supports IPv6. c S4/0/0 sends IIH packets at the interval of 30s. d The cost of S4/0/0 is 20. 56 56. RSTP provides different functions in different scenarios. Which of the following statements Is false? a After TC-BPDU attack defense function is enabled, you can set the number of times the switch processes TC BPDUs within a certain period b The role of the designated port that is enabled with root protection cannot be changed c If the edge port on the switch enabled with BPDU protection receives RST BPDU, the switch sets the edge port as a non-edge-port and triggers STP calculation d When the designated port enabled with root protection receives optimal RST BPDUs, the port enters the Discarding state and does not forward packets. If the port does not receive optimal RST BPDUs within a certain period of time, the port will automatically restore to the Forwarding state 57 57. According to BGP route selection rules, the route with the higher Local_Pref is preferred. a True b False 58 58. Which of the following statements is false? a If the current DR fails, the current BDR automatically becomes a new DR, and a BDR will be elected again. b A device with a higher router priority has a higher election priority. c When a router with the highest router priority joins an OSPF network, this router will become the new DR. d If two devices have the same router priority, the device with a larger router ID has a higher election priority 59 Which of the following TLVs is used by ISIS to describe the IP address of an interface? a 129 b 131 c 128 d 132 60 60. When a routing policy is used to filter routes, which of the following route prefixes will be denied by the IP prefix below? a 1.1.1.1/26 b 1.1.1.2/16 c 1.1.1.1/32 d 1.1.1.1/24 Explicación 1 . 4 . 6 1321321312 7 bla bla bla 8 leer mucho 10 leer mucho 13 87989tuuy 16 ou8979 17 leer mucho 19 leer mucho 40 leer mucho 60 leer mucho

1

1. BFD control packets are encapsulated in UDP packets for transmission. What is the destination port number of multi-hop BFD control packets?

a

4784

b

3784

c

5784

d

2784

2

In the OSPF protocol, inter-area route calculation involves only Router LSA, Network LSA, and Summary LSA.

a

TRUE

b

FALSE

3

3. Which of the following statements regarding OSPF route summarization is false?

a

OSPF supports two route summarization modes: ABR summarization and ASBR summarization.

b

Any router in OSPF can summarize routes.

c

Route summarization is the process of summarizing routes with the same prefix into one route and then advertising only the summarized route to other areas

d

Route summarization can reduce routing information, decrease the routing table size, and improve router performance.

4

4. As shown in the following figure, a new AP is deployed In dual link MSB networking (load Question No : 1 Question No : 2 Question No : 3 Question No : 4 Huawei H12-821_V1.0 2 balancing mode). Which AC will the connect to?

a

AC1

b

Ramdom access

c

None

d

AC2

5

5. Which of the following is the default interval at which the DIS on a broadcast IS_IS network sends CSNPs.

a

30

b

3.3

c

10

d

40

6

6. To inject IGP routes into BGP routes, you can only use the network command.

a

TRUE

b

FALSE

7

7. Which of the following statement regarding the display ospf peer command output is true?

a

Address: 10.1,1.1 Indicates that the local interface address is 10.1.1.1.

b

Through negotiation during DD packet exchange, the local end becomes the slave.

c

Router ID indicates that the local router ID Is 10.1.1.1.

d

The DR address is 10.1.1.1

8

8.A switch runs MSTP. The configuration is shown in the figure. What is the role of this switch in MSTI 1?

a

Uncertain

b

Root switch

c

Non-root switch

d

Secondary root switch

9

9. The filter-policy 2000 export command is run in an ISIS process. Which of the following statements about the functions of a filter policy is false?

a

Is used together with the route import function to advertise some imported external routes to neighbors

b

If this command is not run, the device by default advertises all routes that ISIS Imports form external routing protocols.

c

Controls the advertisement of routes generated by the device

d

Filters LSPs to be advertised.

10

10. To prevent inter-area routing loops, OSPF does not allow advertising routing information between two non-backbone areas and allows sing routing information only within an area or between the backbone area and a non-backbone area. Therefore, each ABR must be connected to the backbone area.

a

True

b

False

11

11. Which of the following statements regarding DR/BDR are false?

a

In a broadcast network, DR and BDR must be elected. A broadcast network without a DR or BDR cannot operate normally

b

DR others listen on the multicast address 224.0.0.5.

c

All DR others establish neighbor relationships with DR and BDR only.

d

DR others listen on the network address 224.0.0.6.

12

12. There are two BFD operating modes. In_______mode, the local end sends BFD Control packets at specified intervals, and the remote end checks whether the local end periodically sends BFD Control packets

a

primary

13

13. Which of the following statements regarding the firewall zone security level is false?

a

The configured security level cannot be changed.

b

Two zones cannot be configured with the same security level.

c

The default security level of the new zone is 1.

d

Only the security level of the user-defined zone can be configured.

14

14. Which of the following PIM protocol packets have unicast destination addresses.

a

Register Stop

b

Bootstrap

c

Graft

d

Assert

15

Which of the following statements regarding the LSA age field are true?

a

The unit of this field is seconds. In a LSDB, the LS age of a LSA increases with time.

b

If the LS age of a LSA has reached the LSRefreshTime (30 minutes), any router can regenerate an instance of this LSA again.

c

The unit of this field is seconds. In a LSDB, the LS age of a LSA decreases with time

d

If the LS age of a LSA has reached the LSRefreshTime (30 minutes), the originator of this LSA needs to regenerate an instance of this LSA again.

16

16. The traffic limiting policy feature only supports the number of connections initiated by the specified IP or the number of connections received.

a

True

b

FALSE

17

17. Which Of the following IEEE 802.11 standards is also known as Wi-Fi 6?

a

802.11ac

b

802.11n

c

802.11ax

d

802.11b

18

18. ON a stateful inspection Firewall where there is no session table, when the status detection mechanism is enabled and the second packet (CYN+ACK) of 3-way hadshakes reaches the firewall. Which of the following statements is true?

a

If the firewall security policy permits packets to pass, the session table is created

b

By default, when status detection is disabled and the permit policy is configured packets can pass.

c

Packets must pass the firewall, and a session table is established.

d

If the firewall security policy permits packets to pass, the packets can pass the firewall.

19

Which of the following statements regarding the BGP error display of a router false?

a

The error may be caused by the incorrect neighbor address.

b

The neighbor address of this router is 10.1.1.5.

c

Error Type indicates that the BGP error is caused by the neighbor relationship error.

d

The error occurred at 12:40:39 on March 22, 2010.

20

A monitoring plane usually comprises the monitoring units of main control boards and interface boards. This plane can monitor the system environment independently. Which of the following environment monitoring functions can be provided by the monitoring plane?

a

Voltage monitoring

b

Temperature monitoring

c

Fan control

d

System power-on and power-off control

21

What parameters can a DHCP6 server assign to a DHCPv6 client?

a

Gateway address

b

DNS server address

c

IPV6 address/prefix

d

SNTP server address

22

Compress the 2001:0DBB:B8:0000:C030:0000:0000:09A0:CDEF address.___________(if the answer contains letters, capitalize them.)

a

pending

23

When two routers exchange LSDB information using DD packets, a master/slave relationship is formed first, the router with a larger router ID is the master, and determine the MS bit.

a

True

b

False

24

The Interface \P address and VRRP virtual IP address can be the same

a

True

b

False

25

25. Regarding the route-policy set-cost configuration below, which of the following statements is true?

a

b

The route 11.1.0.0/16 is permitted by node 10, and its tost Is set to 300.

c

The cost of all routes is set to 200.

d

All the routes that are not permitted by node 10 will be denied.

e

The route 11.1.0.0/16 will continue to match node 20 after permitted by node 10, and (he final cost is set to 200.

26

26. Which of the following attacks is not the network layer attack?

a

IP spoofing attack

b

ICMP attack

c

Smurf attack

d

ARP spoofing attack

27

27. IGMPV3 not only supports IGMPv1 General Query and IGMPv2 Group-Specific Query, and also IGMPv3 Source/Group-Specific Query

a

True

b

False

28

28. Four routers run ISIS and have established adjacencies. The area IDs and router levels are marked in the following figure. If route leaking is configured on R3, which of the following is the cost of the route from R4 to 10.0.2.2/32?

a

80

b

50

c

40

d

30

29

Which of the following statements about multicast packet forwarding is true?

a

If a multicast data packet fails the RPF check, the packet must have been received through a sub-optimal interface. However, this interface still receives and forwards the multicast traffic downstream.

b

IGMP snooping cannot control the scope of multicast traffic flooding on a Layer 2 network.

c

The source address of a multicast packet is a unicast address

d

In multicast transmission, the destination address of a packet can be the unicast address of a host.

30

30. Which of the following statements about the forwarding plane of a switch is false?

a

Provides high-speed and non-blocking data channels

b

Can encapsulate and decapsulate packets

c

Can collect packet statistics

d

Consists of main control boards and interface boards

31

31. Which of the following statements regarding IGMPv1 and IGMPv2 are true?

a

1GMPv2 supports only general query.

b

1GMPv2 defines the Leave message type

c

IGMPv1 does not define the IGMP Leave message type

d

IGMPv1 supports general query.

32

Which of the following statements regarding the stateful inspection firewall is true?

a

When the stateful inspection firewall checks packets, packets of one same connection are not correlated.

b

Because UDP is a connectionless protocol, so the stateful inspection firewall cannot match UDP packets with the status table.

c

The stateful inspection firewall only needs to match the first data packet against a rule, and the subsequent packets of the connection are matched directly in the state table.

d

The stateful inspection firewall needs to match the rules for each incoming packet.

33

What is the correct procedure for a VLAN pool to assign terminals to VLANs.

a

34

34. Huawei firewall by default creates security zones named untrust, dmz, _________ and local. (Use Lowercase letters.)

a

security policy

35

35. Which of the following statements regarding BGP route advertisement are false?

a

All the BGP routes learned from all BGP peer will be advertised to other BGP peers.

b

Only the optimal routes preferred by BGP can be advertised to other BGP peers.

c

By default, the routes learned from an IBGP peer will not be forwarded to other IBGP peers.

d

Only the routes learned from IGPs can be advertised to other BGP peers.

36

36. An engineer sets the CAPWAP heartbeat detection interval to 20 of the active link before an active/standby switchover occurs?

a

75s

b

20s

c

60s

d

90s

37

37. Which of the following statements regarding an IP prefix are true?

a

An IP prefix filter is used to filter IP address prefixes and cannot match an IP prefix number and a prefix length at the same time.

b

An IP prefix filter cannot be used to filter data packets

c

An IP prefix filter is used to filter IP address prefixes and can match an IP prefix number and a prefix length at the same time

d

An IP prefix filter can be used to filter data packets

38

38. Which of the following statements regarding different LSA types is false?

a

LS Request packets contain only LS Type, LS ID, and Advertising Router.

b

LS Ack packets contain complete LSA information

c

DD packets contain only LSA summary information, including LS Type, LS ID, Advertising Router, and LS Sequence Number.

d

LS Update packets contain complete LSA information.

39

39. Which of the following routing protocols support the default route through command configuration?

a

BGP

b

IS-IS

c

OSPF

d

ICMP

40

40. Preferences of routing protocols determine the sequence In which a router selects a route among routes to the same destination /earned through different routing protocols.

a

True

b

False

41

41. See the following figure. RTA, RTB, RTC, and RTD are in the same AS and establish IBGP peer relationships through direct links. RTB an RTC are route reflectors (RRs), RTA and RTC are the RR clients of RTB, and RTB and RTD are the RR clients of RTC. If RTA advertises the route 10.1.1.0/24 to the BGP process, the Originator ID of the BGP route received by RTD is------------------.

a

IN ORDER

42

42. Which of the following configurations are not mandatory when an administrator configures VRRP?

a

Preemption mode

b

Preemption delay

c

Virtual router priority

d

Virtual IP address

43

OSPF supports area authentication and interface authentication. If both authentication modes are configured, Interface authentication takes preference over area authentication.

a

True

b

False

44

44. As shown in the figure, SWA, SWB, SWC, and SWD run the Rapid Spanning Tree Protocol (RSTP). Which of the following statements are true?

a

Once receiving OPOUs, the edge port re-partlci pates in the calculation of the spanning tree.

b

After a port is Configured as an edge port, the port can quickly enter the Forwarding state.

c

You can enable the edge port on SWD's GEO/0/2 connected to the terminal so that this port can quickly enter the Forwarding state

d

You can enable the edge port on SWC's GE0/0/2 connected to the terminal so that this port can quickly enter the forwarding state.

45

45. Which of the following attribute must be carried in an Update message?

a

Local-pref

b

Prefval

c

MED

d

AS-Path

46

46. Compared with STP, RSTP defines the different port states. Which of the following statements regarding discarding and learning states are true?

a

The port In discarding or learning state does not forward data frames.

b

The port in discarding state does not learn MAC addresses table.

c

The port in discarding or learning state does not learn MAC addresses

d

The port In learning stole docs not learn MAC addresses table.

47

47. Drag the following VRRP states to the corresponding working mechanisms.

a

48

48. After which of the following parameters are modified does an IS-IS neighbor relationship need to re-established?

a

The cost of an IS-IS interface is changed

b

The IP address of an ISIS interface is changed.

c

The level of an ISIS interface is changed.

d

The interval at which an IS-IS interface sends IIH packets is changed.

49

49. In BGP, the origin attribute of the routes imported using the import-route command is incomplete.

a

True

b

False

50

50. Which of the following statements is false, based on the following IGMP information on an interface of RTA?

a

The interval for sending group-specific Query messages is 60s.

b

The maximum time for response to Query messages is 10s

c

The IP address of the interface is 192.168.1.1.

d

The IGMP version is IGMPV2

51

51. In a route-policy, which of the following BGP attributes can be used in apply clauses? (A,B,D)

Escoge una o varias respuestas

a

A. MED

b

B. AS_Path

c

C. Tag

d

D. Local-Preference

52

If a router ID is configured in both the system via and the BGP view, BGP uses the router ID configured in the BGP view because the BGP view takes precedence over the system view.

a

TRUE

b

FALSE

53

53. Which of the following statements regarding the summary automatic command and BGP route summarization is false?

a

After this command is configured, BGP sends only the summarized routes to peers

b

This command is used to implement automatic summarization. Automatic summarization takes precedence over manual summarization

c

This command enables automatic summarization for the locally imported routes

d

After this command is configured, BGP summarizes routes based on natural network segments

54

54. Which of the following statements about WLAN roaming are true?

a

APs for roaming do not need to have overlapping signal coverage

b

APs for roaming must be in the same extended service set (ESS).

c

APs for roaming must have overlapping signal coverage

d

APs for roaming must be in the same basic service set (BSS).

55

55. A local router runs IS-IS and its command output is shown in the following figure. Which of the following statements is true?

a

The circuit level of S4/0/0 is Level-1.

b

S4/0/0 supports IPv6.

c

S4/0/0 sends IIH packets at the interval of 30s.

d

The cost of S4/0/0 is 20.

56

56. RSTP provides different functions in different scenarios. Which of the following statements Is false?

a

After TC-BPDU attack defense function is enabled, you can set the number of times the switch processes TC BPDUs within a certain period

b

The role of the designated port that is enabled with root protection cannot be changed

c

If the edge port on the switch enabled with BPDU protection receives RST BPDU, the switch sets the edge port as a non-edge-port and triggers STP calculation

d

When the designated port enabled with root protection receives optimal RST BPDUs, the port enters the Discarding state and does not forward packets. If the port does not receive optimal RST BPDUs within a certain period of time, the port will automatically restore to the Forwarding state

57

57. According to BGP route selection rules, the route with the higher Local_Pref is preferred.

a

True

b

False

58

58. Which of the following statements is false?

a

If the current DR fails, the current BDR automatically becomes a new DR, and a BDR will be elected again.

b

A device with a higher router priority has a higher election priority.

c

When a router with the highest router priority joins an OSPF network, this router will become the new DR.

d

If two devices have the same router priority, the device with a larger router ID has a higher election priority

59

Which of the following TLVs is used by ISIS to describe the IP address of an interface?

a

129

b

131

c

128

d

132

60

60. When a routing policy is used to filter routes, which of the following route prefixes will be denied by the IP prefix below?

a

1.1.1.1/26

b

1.1.1.2/16

c

1.1.1.1/32

d

1.1.1.1/24

Explicación

1

.

4

.

6

1321321312

7

bla bla bla

8

leer mucho

10

leer mucho

13

87989tuuy

16

ou8979

17

leer mucho

19

leer mucho

40

leer mucho

60

leer mucho

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