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The ability to interpret and understand IP addresses and subnet masks is critical for an IT professional. This skill is the foundation for troubleshooting numerous problems, from the assignment of an IP address to a host to routing problems to access-control list problems. It is also necessary for designing and configuring efficient IP networks.

The Cybersecurity Glossary of Terms contains definitions to help you uncover knowledge areas in which you excel and where you want to expand. Read here.