H12-821_V1.0 Question #1018: Real Exam Question with Answer & Explanation

In an OSPF network, an algorithm is used to prevent loops within an area, but loops may occur between areas. Therefore, OSPF defines a loop prevention mechanism for inter-area routes. Which of the following statements are true about the loop prevention mechanism? A. Inter-area routes cannot be directly transmitted between non-backbone areas. B. All non-backbone areas must be connected to backbone area 0. C. Inter-area routes need to be forwarded through area 0. D. An OSPF router inject Type 3 LSAs that describe routes to a network segment in an area back to the same area.