多項選擇題

What are two routing requirements for a device to communicate with another device?（）

A. end-to-end communications path
B. hosts on the same Layer 2 broadcast domain
C. hosts on the same Layer 3 broadcast domain
D. routing information on participating Layer 3 devices

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單項選擇題

Which source of routing information is preferred by default?（）

A. OSPF internal
B. OSPF external
C. IS-IS Level 1
D. IS-IS Level 2

單項選擇題

Which routing table stores IPv4 unicast routes and is used by multicast routing protocols to prevent loops?（）

A. inet.0
B. inet.1
C. inet.2
D. inet.3