Appendix . Exam Cram: The CCNA Cram Sheet

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.

OSI Model

Layer

Name

Protocols and Devices

PDU

7

Application

FTP, Telnet, TFTP, SMTP, POP3, SNMP, DNS, NTP, HTTP, HTTPS, DHCP

Data

6

Presentation

ASCII, .jpg, .doc

Data

5

Session

RPC, SQL/Telnet (for login only)

Data

4

Transport

TCP—Connection-oriented, reliable using PAR UDP—Connectionless, unreliable, uses upper layer protocols for reliability

Segment

3

Network

IP, ICMP, RIP, IGRP, ...

Get CCNA Exam Cram (Exam 640-802), Third Edition now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.