CCNA Training Blog

At the seventh layer of the OSI Model that is Application layer the data is passed down and is segmented into the pieces. At the Transport layer there are two types of the segments the first is TCP segment and the other one is UDP segment. A UDP segment called a datagram and a TCP segment called only segment. A UDP header provided source and the destination port and the TCP header provided source and destination port, sequencing, acknowledgment and the flow control. At the destination point when the data is received the whole process is reversed until the [...] Continue Reading…

There are different types of the network describes-

1. Local Area Network-

Local Area Network (LAN) is a network where two or more system are connected together within a single network and it links the devices in a single office depending upon the need of the organization and the technology used. LAN is design to allow resources to share between the computers and workstations. The resources can be hardware like printer, software like application program or data.

LAN is distinguished from other types of network by their transmission media and the topology is used. LAN is made up of network interface cards [...] Continue Reading…

CCNA is Cisco certified networking Associate. This is a first step of networking. If you are thinking to become a CCNA then prepare your mind for the network world. Where you can popular yourself as a Network Administrator of a branded company. Yes it can be.

For the CCNA you should require the complete knowledge of the OSI layers that define the communication between two computer in the network,IP addressing and subnetting ,static and dynamic routing ,different dynamic routing protocol like RIP,IGRP,EIGRP,OSPF etc,LAN and WAN configuration on the router and switches. Don’t worry you will be familiar about these words [...] Continue Reading…

The Data link layer is the second layer of the OSI Model. The data link layer provides the Physical transmission of the data and handles flow control, errors, network topology. The Data Link layer ensures that the message is delivering to the proper destination in the network using the hardware address. This layer translates the message from the network layer in to the bits for the physical layer to transmit.

The Data link layer receives the massage into the pieces called the frame and adds the header containing hardware destination and the source address.

The Data link layer is subdivided into [...] Continue Reading…

When the network world came into exist at that time computers are communicate to each other if they are manufactured from the same manufacturer. I t was very difficult to communicate with different manufactured. Then ISO reference model was created to remove this system and allow all system to communicate to each other. This model is known as Open System Interconnection (OSI) Model.

This Model was developed to communicate different to each using different protocols works on the different layer of OSI Model .this is the first network model created in the 1970s.This Model describe how the data and network [...] Continue Reading…

Network layer is the third layer of the OSI Model. The Network layer forms the packets from the data received by the transport layer. The Network layer establishes the root between the sending and the receiving host. The Network layer deliver the packet from the one node in the one network to the destination node to the another network. The protocols use in the network layer uses the header that includes the source and destination addresses. This layer handles the routing of the data and the basic of the data in the Network layer is called the Packet.

The Network [...] Continue Reading…

The session layer is the fifth layer of the OSI Model. This is come after the transport layer. This is the Session layer which decides when to turn communication off and on between two computers. It provides the mechanism that control the data exchange process and co-ordinate the interaction between them.

The Session layer defines how to start, control and end the conversation between the two system .the services provided by the first three layer-physical layer, data link layer and the network layer are not sufficient for the some process. The session layer is the Network Dialog Controller. It establishes, [...] Continue Reading…

The Physical layer is the first layer of the OSI Model. It provides the electrical and the mechanical interface of the network medium. It receives the frame from the Data link layer and transfers the bits over the cable to communicate in the network. The physical layer is consist of wire or the media on which the network signal is transfer from the source to the destination .Physical layer include wire, plugs , sockets, signal generator etc.

The Physical layer deals with the electrical and mechanical characteristic of the signal to be transferred .the following are the main work of [...] Continue Reading…

The Transport layer is the fourth layer of the OSI Model. It provides the transparent transfer of the data between the source and the destination and the data communicated by the transport layer is encapsulated in a transport layer and send to the network layer. It is the responsibility of the transport layer to choking the correct delivery of the stream of data. The transport layer manages the end to end control like-it determines whether the entire packet has arrived at the destination point and error checking. It ensures the complete data transfer from sending host to the receiving [...] Continue Reading…

The Application layer is the seventh layer of the OSI Model. This top layer defines the language and the syntax that a program uses to communicate with the other program. The Application layer provides the interface between the program in the system and the network. This layer provide user interfaces and support for the services like-electronic mail, remote file access, shared data base management and other type of information services.

Services provided by the application layer-

1. Network Virtual Terminal-

It is a software version of a physical terminal and allows a user to log on to a remote host. For this [...] Continue Reading…