The Network Security. Org

Top 10 things to know about network administration

If you're just getting started in the networking field, you've got a lot to learn, and with the rate of changes in networking technology, you can expect to always have a lot to learn, but here are ten essential topics that you should concentrate on (and if you are not just getting started, here are some things to review):

1. The OSI model: Memorize it. It's almost a clich, but understanding it is critical.
2. TCP/IP concepts: Learn to think in binary and get a firm grasp on bitmasks, subnetting, gateways (like the "default gateway") and how addresses are constructed (the network portion, the host portion, etc).
3. Stacks: Read about how the network stack is implemented on hosts. Get a good feel for what each component (the NIC, firmware, device drivers, the OS, etc) is responsible for. Once you understand this, troubleshooting is easy. Top 10 things to know about network administration

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