por network devices or connection devices are the physical equipment necessary tohardware interaction and communication of a computer network. They are used to connect a computer and other devices so that they can share files and resources.
Each device has separate range connection device features, which vary according to network scenarios and requirements.
Most common network devices
Some of the most commonly used network devices or connection devices are listed as follows, which also discusses the characteristics of connection devices.
HUB
A hub or concentrator is a device that works as a repeater with multiple ports and is responsible for connect multiple devices on a computer network. In addition, it serves the function of amplifying signals that have deteriorated after a long trip on the connection cables. To extend the reach of a network, a hub It receives the data on one port and then regenerates it and finally sends it to the other ports. These concentrators work on the physical layer of the Osi model standards.
Its process implies that all traffic from a computer connected to the hub, is sent to the other connected devices, every time the concentrator can transmit data. This generates a great network traffic saturationso it is practically no longer used today.
SWITCH
A switch or a switch is a multiport, data link layer equipment that seeks to improve network efficiency thanks to the large capacity of the virtual circuit. Also is responsible for connecting network segments and maintaining limited routing information about internal network nodes. Routing is carried out according to MAC address tables that allow you to know which physical port each address is located on.
Switches are at the second level of network devices, because what enters through one port only exits through another port and not through all of them, as in the case of a hub.
ROUTER
A router it’s a networking device or network devices that are responsible for establishing the best route to transmit data packets to their destination, using routing of that data based on the IP address to send the information to one interface or another.
Furthermore, a router can store information about the network where they are located connected and are part of the network level of the Open Systems Interconnection Model.
GATEWAY
The gateway or gateways are electronic equipment that allow connection between two networks, normally, between a private network and a public network. That is why they are classified as network devices. These gateways sit between the transport and session layers of the OSI model.
Firewall
A firewall or firewall it’s a safety device or one of the network devices that allows packet filtering according to certain rules. Furthermore, given its characteristics of connection devices, it allows network segmentation to create areas with a higher level of security.
IDS and IPS
An IDS is a intrusion detection system signature-based, which only detects and reports potential malicious activity; while an IPS is a sintrusion prevention systemsimilar to IDS, but which can block traffic.
Proxy
It’s a intermediate device for filtering connections user at the application level, that is, it is responsible for facilitating resource requests made by a client to another server.
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