An administrator is configuring single-area OSPF on a router. One of the networks that must be advertised is 128.107.0.0 255.255.252.0. What wildcard mask would the administrator use in the OSPF network statement?

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Question:
An administrator is configuring single-area OSPF on a router. One of the networks that must be advertised is 128.107.0.0 255.255.252.0. What wildcard mask would the administrator use in the OSPF network statement?

0.0.3.255
0.0.0.7
0.0.0.3
0.0.63.255

Exam with this question: Modules 1 - 2: OSPF Concepts and Configuration Exam
Exam with this question: Modules 10 - 13: L2 Security and WLANs Exam