CCNA Training Blog

We can find the purpose of the Presentation layer from its name. It present the data to the Application layer and responsible for the data translation and for the code formatting. The presentation layer defines how the system provides the files and services in a uniform way to application.

When the data is transmitted between different types of computer system from the source point to the destination point, the presentation layer manages the way in which the data is represented and encoded .The presentation layer usually a part of the operating system, that convert the incoming and the outgoing data [...] Continue Reading…

In the networking Topology is the geometric arrangement of the computers system, it defines the geometric arrangement of the system .The Topology refer to the way that a network laid out, it may be physically or logically. the topology made by connecting two or more link to connect the computers system.There are five types of topology these are-Bus topology, Ring topology ,Tree topology, Star topology ,and mesh topology.

Bus Topology

In a bus topology there is one long cable that act as backbone all the devises are connect through this cable. All the system is connected to the bus cable through [...] Continue Reading…

The CCNA certifications is the first step of the Cisco certifications. Becoming a CCNA can be the initial step of a successful journey towards a very high carrier in networking. The ccna program was created to provide a deep introduction to the Cisco internet-working operating system (IOS) and the Cisco hardware.

The skills require for a CCNA-

To meet the CCNA certification skill level must be understand the following-

1.Install,configure and operate simple routed LAN, WAN and VLAN(Virtual LAN).
2.Understand and be able to configure IP, IGRP,EIGRP,OSPF, serial interface, frame relay,VLANs and access lists.
3.Optimize WAN that reduce bandwidth and WAN costs , using [...] Continue Reading…

For Application data to travel uncorrupted from one host to another, header (or control data), which contain control and adding information is added to the data as it moves down to layer.

The process of adding control information as it passes through the layered model is called Encapsulation.Decapsulation is the process of remaining the extra information and sending only the original application data up to the destination application layer.

Each layer adds control information at each step. The generic term for data at each level is Protocol Data Unit.

But a PDU is different at each layer. A PDU at the internetwork [...] Continue Reading…

Networking professional use two networking model to communicate with in the industry-Protocol and the Reference Model.
A Protocol Model provides a model that closely matches the structure of a particular protocol suite. The TCP/IP model is protocol model because it describes the function that occur at each layer of protocol with in the TCP/IP suite.

A Reference Model provides a common reference for maintaining consistency with in all types of network protocol and services. The OSI model is the most widely known Internetworking Reference Model.

The OSI model describes the communication process in details and the TCP/IP model describes the communication [...] Continue Reading…

The Physical layer provides the electrical and mechanical interface to the network medium. This layer gives the data link layer its ability to transport a steam of serial data bits between two communication systems, it conveys the bits that move along with the cable. The Physical layer consists of simply the wire or media by which the network signal is conducted. Physical layer include hardware wire, plugs and sockets, signals generators etc.

This layer has no understanding of the meaning of the bits, but also deals with the electrical and mechanical characteristics of the signals and signaling methods. The Physical [...] Continue Reading…

The ISO develop a model what they called Open System Interconnection (OSI).This model proposed that all network protocol should consist of seven distinct layers. SO is multinational body dedicated to worldwide agreement on international standards. The OSI model is not a protocol, it is a model for understanding and designing a network architecture that is flexible, robust, and interoperable.

Open System Interconnection (OSI)-

The OSI model is a concept that describes how data communication should take place in network. It divides the process into the seven groups called layers. Numerous protocols may exist in each layer. In a given message between [...] Continue Reading…

Our world that we are living in right now is characterized withy the incessant need for the best people in the world. It has been a tradition to look for the best and made use of them. In the realm of a technological world, most of us know for a fact that only the best will survive. To be more specific, let us take the Information Technology arena as an example. In this world, they only hire professionals. Of course they would since their world is very complicated. They only hire people having a certification that would be synonymous [...] Continue Reading…

For a person who holds the Cisco Certified Network Associate (CCNA) Certification, he would be seen by the people around him as an Information Technology professional in the field of Cisco networking, the leading networking company. A lot of people who do not know about the CCNA would ask why this kind of certification is sought-after in the whole world by networking professionals. It is because Cisco career certification is known to be as a large asset of a person since it is highly-recognized globally specially in the arena of Information Technology. And for one to be able to [...] Continue Reading…

For the past years, the Cisco Certified Network Associate Certification test or commonly known as the 640-802 CCNA has evolved from time to time. Due to the rapid increase when it comes to technology, which is the same basis of this exam, thy exam’s need for sufficient preparation has just got a little bit more needy. In the past, the usual CCNA prep guides are books. However, the use of books now will only prove itself to be incomplete for you to be able to ace the CCNA exam. Now, paralleling the evolution of the CCNA exam, there came [...] Continue Reading…