Question

You have an interface on a router with the ip address in the class c network subnet of 192.168.192.10/29. how many total host addresses can exist on the subnet of the lan attached to this router's interface? 62 8 30 6

Answer 1

If 29 bits of the 32 available addressing bits are used for the subnet, then only 3 bits giving 2^3=8 combinations remain for the host addresses. 

In reality, the all zeros and all ones addresses are reserved. So, 8 addresses can exist, but 6 of those are available.

The way the question is formulated it seems the answer 8 is what they're after.