CCNA Lab 2: Subnet a /24 into Four /26s

Bundle lab · $29.99

Hands-on IPv4 subnetting and interface addressing on three IOS routers and one client. You will split a /24 into four equal /26s, assign the correct /26 mask to each link, and configure deterministic lowest-usable addressing on router interfaces. No routing protocols or static routes are used; verification is strictly directly-connected reachability.

Learning objectives

• Perform correct /24 to /26 subnetting and identify subnet boundaries
• Apply deterministic IPv4 interface addressing on IOS with dotted-decimal masks
• Map each link to its assigned subnet based on an allocation rule
• Verify directly-connected reachability without any routing protocol or static routes
• Use show commands to confirm interface state and addressing

Troubleshooting focus

• Mask mismatch on the two ends of a link (/26 vs /24) prevents a Layer-3 adjacency from forming
• Interfaces left administratively down due to missing no shutdown
• Choosing an address outside the assigned /26 or using the network/broadcast address
• Swapped host addresses on a point-to-point pair
• Client default gateway IP mismatch with the router LAN IP