Networking Cheat Sheets
Hand-written, one page each, made to sit next to your keyboard or in a CCNA binder. Download the PDF or print straight from the page. Free to share with students.
Subnetting
- · masks /16 → /32
- · the magic number
- · 2 worked examples
- · private ranges · VLSM
Wildcard masks
- · every wildcard /16 → /32
- · ACL + OSPF lines
- · host · any shortcuts
- · the 255 − mask trick
Learn it, then practise it
The sheets give you the patterns; the subnetting practice trainer drills them with random questions and visual answers. For the details of any single prefix, see the prefix reference.