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
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
Which of the attributes must exist in the BGP Update messages? (Choose three.)
A. LOCAL_PREF
B. NEXT_HOP
C. ORIGIN
D. AS_PATH
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 negotiation.
Each router running OSPF has a router ID. A router ID is a 32-bit integer and uniquely identifies a router. Hence, even of routers in different ASs, the router IDs must be different.
A. True
B. False
Which of the following statements about Stub areas is false?
A. The difference between a Stub area and a Totally Stubby area is that the Totally Stubby area cannot contain summary-LSAs.
B. The ABR in the Stub area generates a default route to guide forwarding of packets destined for other area.
C. A Transit area cannot be configured as a Stub area.
D. Any Stub area can be configured as a Totally Stubby area.
Which of the following statements about Flush packets in a Smart Link group are true? (Choose three.)
A. A Smart Link group sends Flush packets to instruct other devices to update the address table.
B. Flush packets use IEEE 802.3 encapsulation.
C. The destination MAC address of Flush packets is an unknown unicast address, which is used to distinguish protocols.
D. The destination MAC address of Flush packets is a special multicast address, which is used to distinguish protocols.
If the Router Priority of a router is set to 0, this router cannot be elected as a DR or a BDR.
A. True
B. False
Only Router-LSAs and Network-LSAs are involved in intra-area route calculations.
A. True
B. False
Which of the following statements about BFD Echo packets are true? (Choose two.)
A. The Echo packet format is not defined in BFD.
B. The Echo packet format is defined in BFD.
C. Echo packets use UDP destination port number 3785.
D. Echo packets use UDP destination port number 3784.
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