This article on networking devices includes a lot of information about the devices. In detail, common devices like modems, routers, and also other devices that are used like a switch, hub, gateway, bridges are explained. So by the end of the article, you will be well known about the networking devices.
Network connectivity is the process in which various parts of a network to one and another with the use of networking devices. This term is related to the network topology that represents the structure, design of networks, and how they make up.
Network Connectivity Devices
It is a technology that allows sending and receiving data by any telephone or cable line. As we know that a computer stores the data in a digital format but the telephone lines transmit the data in analog data form. So by this, we got the idea about a modem. Its main function is to convert from a digital signal to an analog signal or vice versa. The modem is formed using two devices i.e Modulator and Demodulator both together formed modem. This Modulator converts digital signals to analog signals while Demodulator converts analog signals to data signals.
A hub is fundamentally a multiport repeater. A hub is used to connect to a bunch of wires coming from different offshoots.
Types of hub
- Active hub
- Passive hub
- Intelligent hub
Active hub: This hub is capable of cleaning, boosting, and relaying the signal along with the network and having the ability to carry its own power supply. These are able to extend the distance between the nodes and serve as wiring center and repeater both.
Passive hub: Power supplies from the active hub are collected by the passive hub and it also collects the wiring from the branches.
These hubs, without cleaning and boosting, relay the signal along with the network like an active hub, and the distance between the nodes can’t be extended.
Intelligent hub: Intelligent hubs have the capabilities of remote management and work like active hubs. By using this hub an administrator can monitor the traffic passing through the hub.
Repeaters are the devices that work at the physical layer. Before the signal becomes weak, It regenerates the signals over the same network. But repeaters do not amplify the signal. Repeaters check when the signal is going to be weak, then copy the signal bit by bit and regenerate it. It is a two-port networking device.
A bridge function at the data link layer. Two LANs working on the same protocol are interconnected by using this. It works as a two-port device because it has a single input and single output port.
Types of bridges
- Transparent bridges
- Source routing bridges
Transparent bridges: bridge forwarding and bridge learning are the two processes we used in the bridge. A bridge is not added or deleted from the network and station reconfiguration is gratuitous.
Source routing bridges: Source stations are the performer for the routing operation. The frame is used to specify which route to follow. A Discovery frame is a special frame that is sent by the host to discover a frame, by using all special path discovery frames spread throughout the entire network to the destination.
The switch is a very efficient device. It is a multiport bridge device. And is designed to boost its efficiency and performance. It is a data link layer device, as it performs error checking before forwarding data. As above we saw it is a multiport device that means it has many ports and these ports have computers plugged in.
Some different types of Switch
- Unmanaged Switch
- Managed Switch
- LAN Switch
- PoE Switch
Unmanaged Switch – This type of switch is commonly used in our home network or small business. It is an inexpensive switch. It is set up for simple plugging into the network.
Managed Switch – This type of Switch is used in large organizations and complex networks. It is a costly switch. These include QoS ( Quality of service) like higher security levels, better precision control.
LAN Switch– Local Area Network is a network in a small area-like organization. So the LAN Switch connects devices in the Local Area Network of an organization, which we can say is ethernet.
PoE Switch – Power over Ethernet ( PoE) switches combine technology for both data and power transmission over the same cable.
It is a device that receives, analyzes, and forwards data packets between networks. It is an implicit internetworking device. The IP address of the data packet is analyzed by the router, and to decide the best way for the transfer of packets it uses the headers and forwarding tables. Some important companies that develop routers are HP, Cisco, Juniper, etc.
Types of router
- Wireless router
- Core router
- Edge router
- Broadband router
Wireless router: This type of router is used to provide wifi connectivity to the computer, laptop, smartphone, and other devices with wifi network abilities. The wireless router provides connection ranges up to 150 feet when it is indoor and when it is outdoor it provides ranges up to 300 feet. To make it more secure we can put password security in it.
Brouter: The bridge and router are a combination of a brouter. Brouter provides data transfer between the network like a bridge. Within an individual network system, it can convey the data like a router.
Core router: A core router is not able to route the data between the network but it can route the data within the network. ISPs (Internet service providers) use core routers.
Edge router: this router is also known as an access router. This type of router is present at the boundary of a network that is a lower-capacity device. It provides facilities that help in connecting internal networks to the external network.
Broadband router: For high-speed internet access to computer broadband routers are used. Connecting our phone to the Internet and using voice over IP technology broadband routers is needed.
Gateway is a networking device that creates a passage to connect two networks of different networking models together. It is a type of messenger agent that takes data from one system to interpret and then transfers it to the other system. We can also say gateway as a protocol converter.
We discussed different types of networking devices like modems, hubs, switches, repeaters, routers, gateways, bridges. Modem, routers are the networking device that we use in our homes, these are used in small offices too. Switches, hubs, repeaters are the device which has more than one ports.