Go back to H12-221 - HCNP-R&S-IERN (Huawei Certified Network Professional-Implementing Enterprise Routing Network)

Question :-

You are using the address space 172.28.100.0/24. If the subnet mask 172.28.100.0/30 is used to subnet this address space to serve WAN links, how many total subnets can the address space be divided into?
30
64
126
254

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