The CCNA exam is one of the hardest written exams created by Cisco. The reason is that the objectives are so broad and cover such a large area of internetworking. To pass the CCNA, you really have to be prepared.
The CCNA exam certifies that the successful candidate has important knowledge and skills necessary to select, connect to, configure, and troubleshoot the various Cisco networking devices. CCNA-certified professionals can install, configure, and operate LAN, WAN, and dial access services for small networks (100 nodes or fewer).
To meet the CCNA certification skill level, you must be able to understand or do the following:
Install, configure, and operate simple-routed LAN, routed WAN, and switched Virtual LAN (VLAN) networks.
Understand and be able to configure IP, IGRP, EIGRP, OSPF, serial interfaces, Frame Relay, IP RIP, VLANs, Ethernet, and access lists.
Install and/or configure a network.
Optimize WAN through Internet-access solutions that reduce bandwidth and WAN costs, using features such as filtering with access lists.
The following list gives the objectives found on Cisco's website for the CCNA 640-801 exam:
Planning & Designing
Design a simple LAN using Cisco Technology
Design an IP addressing scheme to meet design requirements
Select an appropriate routing protocol based on user requirements
Design a simple internetwork using Cisco technology
Develop an access list to meet user specifications
Choose WAN services to meet customer requirements
Implementation & Operation
Configure routing protocols given user requirements
Configure IP addresses, subnet masks, and gateway addresses on routers and hosts
Configure a router for additional administrative functionality
Configure a switch with VLANS and inter-switch communication
Implement a LAN
Customize a switch configuration to meet specified network requirements
Manage system image and device configuration files
Perform an initial configuration on a router
Perform an initial configuration on a switch
Implement access lists
Implement simple WAN protocols
Troubleshooting
Utilize the OSI model as a guide for systematic network troubleshooting
Perform LAN and VLAN troubleshooting
Troubleshoot routing protocols
Troubleshoot IP addressing and host configuration
Troubleshoot a device as part of a working network
Troubleshoot an access list
Perform simple WAN troubleshooting
Technology
Describe network communications using layered models
Describe the Spanning Tree process
Compare and contrast key characteristics of LAN environments
Evaluate the characteristics of routing protocols
Evaluate TCP/IP communication process and its associated protocols
Describe the components of network devices
Evaluate rules for packet control
Evaluate key characteristics of WANs