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單項選擇題A router has EIGRP configured as the only routing protocol. How does EIGRP respond if there is no feasible successor route to a destination network and the successor route fails?（）

A. It immediately sends its entire routing table to its neighbors.
B. EIGRP sends a Hello packet to the DR to inform it of the route failure.
C. It automatically forwards traffic to a fallback default route until a successor route is found.
D. It sends queries out to neighbors until a new successor route is found.
E. It places the route in holddown until LSA updates inform it of a new route to the network.

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1.多項選擇題Which table of EIGRP route information are held in RAM and maintained through the use of hello and update packets?（）

A. Neighbor table
B. SPF table
C. RTP table
D. Topology table
E. Query table
F. DUAL table

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2.多項選擇題Which statements are true regarding classless routing protocols?（）

A. The use of discontiguous subnets is not allowed
B. The use of variable length subnet masks is permitted
C. RIP v1 is a classless routing protocol
D. IGRP supports classless routing within the same autonomous system
E. RIP v2 supports classless routing

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3.多項選擇題Which of the following statements regarding EIGRP successor routes is valid?（）

A. A successor route is used by EIGRP to forward traffic to destination.
B. Successor routes are saved in the topology table to be used if the primary route fails.
C. Successor routes are flagged as "active" in the routing table.
D. A successor route may be backed up by a feasible successor route.
E. Successor routes are stored in the neighbor table following the discovery process.

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4.單項選擇題In what location are EIGRP successor routes stored?（）

A. In the routing table only.
B. In the neighbor table only.
C. In the topology table only.
D. In the routing table and neighbor table.
E. In the routing table and topology table.
F. In the topology table and neighbor table.

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5.單項選擇題A new network has been configured using OSPF as the routing protocol. With which network type will OSPF establish router adjacencies but not perform the DR/BDR election process?（）

A. point-to-point
B. Backbone area 0
C. Broadcast multicast
D. Non-broadcast multi-access
E. The DR/BDR process is done for all interface types

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