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.

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.

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.

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

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.

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

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.

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.

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.

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