Introduction to The Network Devices
In the networking, we use different network devices for communication purpose in the network. These network devices also work at different segments of a computer network performing different works.
In this article are talking about the different network devices like;
Network Devices –
It is a networking device, which is used to connect multiple network hosts. A network hub is also used to data transfer. The data transferred in terms of packets on a computer network. When a host sends a data packet to a network hub, the hub copies the data packet to all of its ports connected to it. All the ports know about the data and the port. Thus, for whom the packet is intended, claims to it.
However, because of its working mechanism, a hub is not so secure and safe. Moreover, copying the data packets on all the interfaces or ports makes it slower and more congested which led to the use of network switch.
2. Repeater –
A repeater is an electronic device that work to amplify the signal it receives. In other terms, you can think of repeater as a device, which receives a signal and retransmits it at a higher level or higher power so that the signal can cover longer distances.
3. Switch –
The working of switch is similar to hub, but a switch is more intelligent than a hub. A switch does ‘filter and forwarding’ which is a more intelligent way of dealing with the data packets.
When a packet is received at one of the interfaces of the switch, it filters the packet and sends only to the interface of the intended receiver. For this purpose, a switch also maintains a table called CAM (Content Addressable Memory) table and has its own system configuration and memory.
4. Modem –
A modem stands for (Modulator+Demodulator) that means it modulates and demodulates the signal between the digital data of a computer and the analogue signal of a telephone line.
We are easily see the device in the homes and in daily uses.
5. Router –
A router is a network device, which is responsible for routing traffic from one network to another. These two networks could be a private company network to a public network. You can think of a router as a traffic police who directs different network traffic to different directions.
6. Bridge –
If a router connects two different types of networks or two different subnetworks connects as a part of the same network then it is called as bridge. You can think of two different labs or two different floors connected by a bridge.
7. Firewall –
A firewall is a network security device that grants or rejects network access to traffic flows between an untrusted zone (e.g., the Internet) and a trusted zone (e.g., a private or corporate network).
Network Devices Used in OSI Layers –