You have one address, 196.172.128.0 and you want to subnet that address. You want 10 subnets. 1. What class is this address

This address is by default a class c network

Explanation:

This IP address in this question is a class c network because it has 196 as its first octet. A class c network is one which has its first octet to be between 192 and 223. the class c network begins with a 110 binary.  If ip is between 192 to 223 it belongs to this class. These first 3 octets are the representation of the network number in the address. Class c's were made to support small networks initially.

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