Consider the IP address 128.252.144.84. What is the network id and what is the node id ? assume classful networking.
a. 0.0.0.0 and 128.252.144.84
b. 128.0.0.0 and 252.144.84
c. 128.252.0.0 and 144.84
d. 128.252.144.0 and 84
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