单选题Which source of routing information is preferred by default?（）AOSPF internalBOSPF externalCIS-IS Level 1DIS-IS Level 2
单选题
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
参考解析
解析：
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