The one that supports VLSM, summarization, and discontinuous networking are EIGRP, OSPF, and RIPv2. The correct options are C, D, and F.
Variable Length Subnet Mask (VLSM) is a segmented subnet of a larger network design strategy in which all subnet masks can be of varying sizes.
This "subnetting subnets" process allows network engineers to use different masks for subnetworks of a single class A, B, or C network.
EIGRP, OSPF, and RIPv2 are the ones that support VLSM, summarization, and discontinuous networking.
Thus, the correct options are C, D, and F.
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