A computer network consists of several electronic devices connected to each other to exchange and also share information and resources. We could say, therefore, that they are communication systems in which different devices act as transmitter and receiver alternately.
The Internet is an example of a computer network : millions of devices interconnected with each other to communicate and also share resources.
The following elements intervene in a communication system: sender, receiver, message, channel, code and context. In a computer network we have the devices , the means of connection , the structure and also the mode of operation of the networks and the information and shared resources.
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The devices involved in a networked computer system are divided into:
those that manage access to information and also communication. For example: the router, the modem, an access point, a bridge,the switches, etc.
those that connect to the network to access information or resources. For example: a computer, a tablet, a mobile phone, a notebook, a smart TV, a printer, a game console, etc.
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To communicate, the devices are related to each other through connection means. These media can be classified as follows :
The operation and also structure of computer networks are defined in different standards. The most widespread standard is the TCP / IP model , which is based on the theoretical OSI model.
The structure of a network can be client-server , where the connected devices perform the following functions:
The devices of a computer network can exchange information of all kinds :
On the other hand, it is as well conceivable to share resources of different kinds :
There are different types of computer networks depending on their size or range :
formed by the devices of a single person. Its range is a few meters.
wireless connection PAN network.
local range, like a building or an airplane, for example. It does not include connections for public use.
wireless LAN. They are the most used.
a high-speed device network that connects local networks in a limited geographic area, such as a university campus, for example. It does not use public connections.
high-speed network (broadband) that provides coverage to a large but limited geographic area.
covers a enormous area using satellites, interoceanic cables, fiber optics, etc. Use public media.
logical or virtual LAN. It is installed over a physical network with the purpose of increasing performance and security.
If you want to dedicate yourself to the technology sector, Tokyo has its Cisco Networking Specialist course for you. CCNA Routing & also Switching. This course prepares you to be an expert in installing computer networks .
Know what what is the Cisco CCNA Routing & also Switching Certification? It is a certification that accredits knowledge about installation, configuration, operation and also troubleshooting in data networks based on router and switcher equipment.
There are several CCNA certification job opportunitiesWith this accreditation you will be able to access companies of all kinds such as a network administrator or technician . Thanks to the digital revolution, this specialization is in high demand .
The Cisco Network Specialist Tokyo course. CCNA Routing & also Switching offers you a comprehensive, quality training program totally focused on the labor reality of the technology sector. This program is made up of the ensuing didactic modules for example :
These modules are designed for you to achieve the following training objectives :
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