Study Resources
Printable reference sheets and cheat sheets for exam prep. Open any sheet to preview it, then use your browser's Print / Save as PDF to download.
A+ Exam
Common Ports & Protocols
Quick-reference table of exam-relevant port numbers, TCP/UDP classifications, service names, and memory hooks. Covers FTP, SSH, SMTP, DNS, DHCP, HTTP, RDP, SMB, and more.