This Cram Sheet contains key facts about the CCNA exam. Review this information as the last thing you do before you enter the testing center, paying special attention to those areas in which you feel that you need the most review. You can transfer any of these facts from your head onto a blank sheet of paper immediately before you begin the exam.
Protocols and Devices
FTP, Telnet, TFTP, SMTP, POP3, SNMP, DNS, NTP, HTTP, HTTPS, DHCP
ASCII, .jpg, .doc
RPC, SQL/Telnet (for login only)
TCP—Connection-oriented, reliable using PAR UDP—Connectionless, unreliable, uses upper layer protocols for reliability
IP, ICMP, RIP, IGRP, ...