640 – 802 CCNA New Exam Syllabus

640 – 802 CCNA New Exam Syllabus
Exam Topics

The following topics are general guidelines for the content likely to be included on the Cisco Certified Network Associate exam. However, other related topics may also appear on any specific delivery of the exam. In order to better reflect the contents of the exam and for clarity purposes, the guidelines below may change at any time without notice.

Describe how a network works

• Describe the purpose and functions of various network devices
• Select the components required to meet a network specification
• Use the OSI and TCP/IP models and their associated protocols to explain how data flows in a network
• Describe common networked applications including web applications
• Describe the purpose and basic operation of the protocols in the OSI and TCP models
• Describe the impact of applications (Voice Over IP and Video Over IP) on a network

Benefits Of Subnetting

There are  many advantages or Benefits by doing Subnetting.
Subnetting  : Process of Breaking Down of an IP Network into small small Networks.
                   Ex. A country is broken down in small small States.--You can understand it very easily.
Benefits:
            1. It will reduces the IP routing Table.
            2. Easy To manage the Network.
            3. Flexible and Scalability.
            4. As size of Network is small , so traffic control and performance will increased .

Let, Know about Network Model.

Network Models

There are two theoretical models of networking, the TCP/IP Model and the OSI Model.
The TCP/IP Model directly reflects how the Internet and TCP/IP based networks work. As the smaller, less complex model it is easier to learn. However, engineers more frequently refer to the OSI Model.
The OSI Model is a model of how networks should work. It is theory only, and not a hard science. It is a model designed to make it easier to categorize different technologies and protocols so that their operation can be more easilly described and understood.
Both the TCP/IP Model and the OSI Model are part of the Cisco CCNA certification exam, so you have to know them both.