Question 141
Which of the following statements about link aggregation are true? (Choose three.)
A. Link aggregation can be performed in manual load balancing or LACP mode. In manual loading balancing mode, LACP is enabled; in LACP mode, LACP is enabled too.
B. In manual load balancing mode, all active member interfaces forward data and perform load balancing.
C. In static LACP mode, the creation of the Eth-Trunk and the addition of member interfaces to the Eth-Trunk are performed manually. Compared with link aggregation in manual load balancing mode, active interfaces in static LACP mode are selected by sending LACP Data Units (LACPDUs).
D. In dynamic LACP mode, the creation of the Eth-Trunk, the addition of member interfaces, and the selection of active interfaces are performed based on LACP
Question 142
Which of the following can speed up OSPF fast convergence? (Choose two.)
A. Configuring dynamic BFD for OSPF
B. Adjusting the interval at which OSPF calculation is performed
C. Configuring the interval at which an LSA are retransmitted
D. Configuring the maximum number of external LSAs in the LSDB
Question 143
Which of the attributes must exist in the BGP Update messages? (Choose three.)
A. LOCAL_PREF
B. NEXT_HOP
C. ORIGIN
D. AS_PATH
Question 144
Which of the following LSAs are flooded within a single area? (Choose three.)
A. Router LSA
B. Network LSA
C. Summary LSA
D. AS External LSA
Question 145
BGP peers are automatically discovered by exchanging multicast packets.
A. True
B. False
Question 146
Which statements about the Local-Preference attribute are true? (Choose two.)
A. Based on BGP route selection rules, the Local-Preference attribute has a lower priority than the Preferred-Value attribute. This means that BGP compares Local-Preference attributes of routes after comparing Preferred-Value attributes of them.
B. The Local-Preference attribute of a BGP route defaults to 0.
C. The Local-Preference attribute is used to select an exit point from the local AS for data flows.
D. Based on BGP route selection rules, the Local-Preference attribute has a lower priority than the MED attribute. This means that BGP compares Local-
Question 147
The ABR of an NSSA will not advertise Type-4 and Type-5 LSAs to an NSSA but can import external routes into the NSSA.
A. True
B. False
Question 148
In transit AS, why do core routers run BGP?
A. Eliminate route loops
B. Ensure data packets can be transmitted to the external destination addresses
C. Optimize network within an AS
D. Ensure only one export
Question 149
Which command can trigger the advertisement of BGP routes without interrupting a BGP connection?
A. Reset bgp
B. Refresh bgp all external
C. Refresh bgp all internal
D. RR-filter
Question 150
Which of the following BGP filters can be used to set route attributes?
A. Ip-prefix
B. Route-policy
C. As-path-filer
D. Community-filter
