Subnet Mask — Cisco CCNA (200-301) Practice Questions
A subnet mask is a 32-bit value used in IPv4 networking to distinguish the network portion of an IP address from the host portion, enabling routers and devices to determine whether traffic should be forwarded locally or to a gateway. The CCNA 200-301 exam heavily tests subnetting skills, including the ability to calculate network addresses, broadcast addresses, valid host ranges, and the number of usable hosts for a given prefix length. Mastery of subnet masks is foundational to configuring and troubleshooting both IPv4 addressing and routing on Cisco devices.
Free questions on subnet mask
What is the subnet mask for a /24 network in decimal notation?
Free question · easy · full answer + explanation
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