From the course: Subnetting in Your Head

Confidence and troubleshooting

From the course: Subnetting in Your Head

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Confidence and troubleshooting

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- [Instructor] The ability to subnet in your head will boost your confidence when you're talking about networking. You'll know when looking at a network topology what your're really seeing, what's really connecting, and how you would follow those packets, and whether that should work. You'll be able to learn a new networking concept without having to always be remembering how to do the subnetting. You'll be able to understand the packet flow, and what's supposed to happen next. In regards to troubleshooting, you'll be able to look at a router and the interfaces that are on the router and the IP addresses that are there, and know whether they should work or not for that particular topology. If it's network-addressed translation that you're trying to learn, then you'll know about the IP addressing already, and it will become second nature, so you'll be able to quickly look at the problem and be able to determine the solution, because you won't be caught up in trying to figure out the IP addressing. It's the same thing with access control lists. Access control lists can be very difficult to learn if you don't understand the subnetting. On the other hand, they're rather simple when you do. Any kind of network topology that you look at is going to have IP addresses on it. You'll be able to know whether those are the proper IP addresses, and whether those topologies should operate with those addresses.

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