(even if there are a large quantity of valid hosts that go unused)
I’ve been trying to understand IP addresses and subnet masks and I watched (and understood) the majority of this video https://youtu.be/s_Ntt6eTn94. This was a question I had at the end though. Is there some sort of disadvantage of having a class A subnet?
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Your question is like asking why do we sometimes use buses instead of cars to get people ftom A to B?
If you’ve only got 5 people to transport, then a car (/29) is perfect.
If you’ve got 200 people to transport, a bus (/24) may be more appropriate.
Finally, if you need to move 16,000,000 people…
In reality, you would never assign anything greater than a /23 to an enterprise host (too much broadcast spam) but you may find yourself using /16 or /8 for ‘summarising’ just like you might put all your bags of shopping in one trolley instead of trying to carry 11 bags.
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