Which of the following statements regarding area border routers in an OSPF network is true?
A . The term backbone router has the same definition as the term area border router.
B . An OSPF network needs at least one area border router to function.
C . Area border routers connect the backbone area to other areas in an OSPF network.
D . By definition, an area border router must perform route summarization between areas.
Answer: C
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