What do you mean by Subnet and Subnet Mask? The network address of 172.16.0.0/19 provides how many subnets and hosts? What is the function of OSPF?

What do you mean by Subnet and Subnet Mask? The network address of 172.16.0.0/19 provides how many subnets and hosts? What is the function of OSPF?

From the Rupali Bank Assistant Network Engineer November 2023 – Written (MIST) exam, question 15 of 22.

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