 CCNA define or in some extent short introduction:
ccna stand for Cisco certified network associate means that it is certification of achieving a networking after passing out a exam some else 640-801 0r 640-802 we can also say that this certification improve or enhance your skills of your professionals at home or in office place this can also grow your salary within right place right job. This certification is one of the most a well known and also awarded by Cisco certified network association.
640-801 was launched on 30th June 2003 and 640-802 come into market in 8th January in 2007 and previous 640-801 terminated in 6 November 2007.You can also build your networking skills with the support of this certification, and your career will be enhance by using the LAN/WAN technologies you can become a IT professional without taking any classes or any other else. This exam must be help to get this certification, it’s a good step of 640-802 for all the peoples who want to know about and craze for computer networking. This is best for your career path. And also you can learn a lot of things if you avail and participated in this exam which is 640-802 that help you how to do networking as best. Also through this preparation of the exam you can know how to connecting a WAN, implementing a network security, IP route system & also IP addressing.
640-801 and 640-802 both are the examination code this test will be organized for the assessment of individual how much he competent in computer or LAN/WAN networking how much he skilled or experienced in operate or troubleshooting a small medium enterprise, this test only conduct for this purpose only that examine each individual person how to connect a WAN, implementation of network security, network types, media, routing and switching basic fundamentals. It also identifies the security threats to a specific network.
But company which take the exam now have been changed the strategy and they terminated the past test which was based on the name of this code 640-801 but right now they have introduced new exam test based on the name of 640-802 a lot of changes in it due to some reasons for good or improve it in future.
Basically our purpose just to awareness about IT field because now a day IT is growing day by day even though you will see this industry will be No.1. You can see Microsoft is the No 1 brand all over the world. Actually we enhance your career development. You can obtain the certification by two ways one is the icdn1 and other is icdn2 or you can say that mixed or combined test which is divided into two parts. Clients get fully relaxation to pass the exam and achieve certification.
The validation of both these exams for three years only. By learning and passing this examination you can get a better job as a network administrator in field of IT.
Ccna 640-801 is a single exam approach in which any candidate pass the exam in one time but ccna 640-802 you have passed in two modules it just designed for the students who feel burden or want some relaxation.
It is used for building a simple network and exploring functions of networking.

• Similarities & Dissimilarities between CCNA 640-801 & 640-802:
 Similarities:

There are some similarities in both exams which I am going to elaborate under as;

1. Both are using for exam system
2. Validation for 18 months
3. Securing the network
4. Timing for the test remain the same
5. Troubleshoot WAN implementation issues
6. Network Media like as using cables, ports and connectors.

 Dissimilarities:

NO. CCNA 640-801 CCNA 640-802
1.
Single-exam option mean that you have no option or not any relaxation in exam you have to pass the exam complete in one part if you want to get certification of ccna.

Composite exam (combined or mixed) mean that client or student get fully relaxation to pass in exam, course has divided in two parts.
2.
This exam will test the material from the new connection with each other Cisco Network Devices (ICND) course as well as the new Introduction to Cisco Networking Technologies (INTRO) course

Candidates can prepare for this exam by taking the connection with each other Cisco Networking Devices Part 1 (ICND1) v1.0 and the Interconnecting Cisco Networking Devices Part 2 (ICND2) v1.0 courses.
3.
Has important knowledge & skills about install, operate and troubleshoot with various networking devices.

knowledge and skills required to install, operate, and troubleshoot a small to medium size enterprise branch network
4.
Network switched with Local area network(LAN) network

Network switched with wide area network(WAN)
5.
Determine IP route, managing IP traffic
And establishing point to point connections

Due to change the topics in this course likes as implementing network security; network types; network media
6.
Features:
Questions limit 55-65
In this exam questions some have been modified by decreasing from 45-55
7. Language modified;
Only 4 language
Configure IP address and host
It has increased by 4 to 6 language