OSPFAmong the five types of LSAs are used to transmit external routes, which of the following statements about the five types of LSAs is incorrect (single choice)

• A.Five types of LSA by ASBR advertises and floods the OSPF network in non-Stub/NSSA areas
• B.A router in the same area as the ASBR can calculate the external route through the intra-area LSA and Category 5 1SA
• C.The FA address is included in the five types of LSAs. The FA address is 0.0.0.0, which is only reserved and has no practical effect.
• D.existFive types of LSAs can be filtered by configuring corresponding filtering policies on ABR or ASBR.

Comment: *

Name: *

Email: *

Verification: *

As shown below,R1, R2, R3 established Level2's neighbor relationship. aboutR3's IP routing table statement is correct:

• A.The 2020::/64 route will appear in the IP routing table
• B.The 2021::/64 route will appear in the IP routing table
• C.The 2019::/64 route will appear in the IP routing table
• D.The 2022::/64 route will appear in the IP routing table

Comment: *

Name: *

Email: *

Verification: *

BGPAfter importing routes from other protocols, the next hop in the BGP routing table is the same as the next hop of the imported routing protocol.

• A.True
• B.false

Comment: *

Name: *

Email: *

Verification: *

As shown in the figure, R1, R2 and R3 run OSPP at the same time and announce their respective loopback ports. The following description is wrong.

• A.filter-policy can be used on R2 expoThe rt command filters the loopback route of R3
• B.R2 can be used in Area use filter in 0r import command to filter the loopback route of R3
• C.filter-policy can be used on R1 import filters the loopback route of R3
• D.Area is available on R2 Use filter in 1r expot command to filterR3 loopback route

Comment: *

Name: *

Email: *

Verification: *

uninterrupted forwardingNSF (Non-Stopping Forwarding) and nonstop routing NSR (Non Stopping Routing) are two solutions for high reliabilitysolution, which of the following statements is correct

• A.NSR standby routers need to negotiate the ability to support NSR through specific packets
• B.turn onNSFAfter that, the router is switched between active and standby, and the routing table and forwarding table remain unchanged, so the traffic will not be lost during the GR time.
• C.NSF routers do not need to negotiate the ability to support NSF through specific packets
• D.NSRAfter this is enabled, if the main control board fails before the batch backup of services is completed, the NSR switchover cannot be completed.

Comment: *

Name: *

Email: *

Verification: *