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Switching use to connect multiple devices, such as computers, wireless access points, printers and servers; on the same network within a building or campus. A switch allows connected devices to share information and communicate with each other.

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Routing  use the router to  send data packets between computer networks. Routers perform the functions of directing traffic on the Internet. ...Then, using information in its routing table or routing policy, it directs the packet to the next network in its journey.

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Firewall is a network security device that monitors incoming and outgoing network traffic and decides whether to allow or block specific traffic based on a defined set of security rules. ... A firewall can be hardware, software, or both.

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Cloud computing  is the delivery of different services over the Internet, including data storage, servers, databases, networks, and software. ...Services can be both public and private: public services are provided online for a fee, while private services are hosted on a network for specific clients.

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Switches or PBX this is used to share several external lines to make external telephone calls. A PBX connects the internal telephones within a company and also connects them to the public switched telephone network (PSTN), VoIP providers and SIP trunks, currently unified communications are the trend in organizations, which consist of using an app in which you have your telephone extension to if as a corporate messaging system.

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Wireless link  this allows you to provide a LAN or Internet connection to a remote or difficult-to-reach place to make a cable installation, these can carry data and voice (Voice IP – VoIP).

 

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