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Computer Networks

Why Networking Devices is the only skill you really need


Why Networking Devices is the only skill you really need

According to each person’s area of interest, networking offers a large ocean of prospects that can lead to finally landing the dream jobs. A wide variety of gadgets are used in networking to start and aid effective fieldwork. In the field of networking, there are many different gadgets that all strive toward making this happen. Let’s now examine each of these gadgets closely to discover how they function and what purpose they serve.

In networking, lots of devices are used to implement the networking topologies in organizations. Most of the important devices, such as hubs, switches, routers, bridges, gatways, and many more, will be discussed in this blog.

Networking skills will help students in most of the courses and also help them get started in IT domains. If a person starts their career in the developer domain, cyber security domain, or cloud computing domain, then students should have good command of the networking domain.

The Top Network Hardware Devices for Networking

1. Hub

A hub is a kind of networking device that connects several networking nodes by way of the physical layer. They are frequently used to connect computer in a LAN.

A hub contains a lot of ports. In order to connect to the network, a computer is connected into one of these ports. Data frames are broadcast to all ports when they arrive at a port, regardless of whether they are destined there or not.

It is a network device that lacks intelligence and broadcasts messages to all ports. It broadcasts messages basically. Half-duplex transmission is the mode. There is no software connected to them; they are passive devices. When multiple computers send data to the same port at once, collisions may happen during setup of the transmission.

Types of Hubs:

  • Passive Hub
  • Active Hub
  • Intelligent Hub
  • Advantages of Hub:

  • Due to its low cost, anyone can utilise it.
  • It is simple to link a wide range of media types.
  • The performance of the network is unaffected by the deployment of a hub.
  • It can also increase the network’s overall distance.
  • Disadvantages of Hub:

  • It excludes components like collision detection.
  • It cannot be separated into segment and is unable to operate in full-duplex mode.
  • It has no mechanism; therefore, it can be used to reduce network traffic.
  • As it sends packets to every connected segment, it is unable to filter the data.
  • As it sends packets to every connected segment, it is unable to filter the data.
  • Also, it cannot join different network designs such as a ring, token, ethernet, and others.
  • 2. Switches

    In the OSI model, switches are networking components that operate at layer 2, or the data link layer. They establish connections between networked devices and employ packet switching to transmit, receive, either forward data packets or frames over the network.

    Every data frames that enters one of the ports of a network switch is evaluated for its destination address, any necessary checks are performed, and the frame is then sent to the proper device. Broadcast, multicast, and unicast communications are all made possible.

    Types of Switches:

  • Unmanaged Switch
  • Managed Switch
  • LAN Switch
  • PoE Switch
  • Advantages of Switching:

  • The network’s bandwidth is increased by the switch.
  • By lowering network traffic, it improves the network’s overall performance.
  • As the switch builds the collision domain for each connection, there will be fewer frame collisions.
  • The devices that have been addressed receive information, which minimises the stress on individual PCs.
  • Disadvantages of Switching:

  • Network bridges are less expensive than switches.
  • Switches are unable to quickly identify network connectivity problems.
  • Multicast packet handling requires proper switch design and configuration.
  • 3. Router

    The layer 3, or network layer, of the OSI model is where routers operate as networking devices. Receiving, analysing, and transmitting data packets between the connected computer networks is their responsibility.

    Upon receiving a data packet, the router examines the destination address, check its routing databases to determine the best route, and then sends the packet along that same route. A routing table is present in routers and is periodically updated in response to network changes.

    It makes use of a routing protocol and checks the table to transmit data packets. In comparison to switches, hubs, bridges, and other networking equipment, routers are more expensive.

    Types of Routers:

  • Wireless Router
  • Broadband Router
  • Core Router
  • Edge Router
  • Brouters
  • Advantages of Routers:

  • Routers incorporate bundle filtering, which includes parcel separation and bundle exchanging. Routers use a number of separation rules to channel an organisation.
  • Using a single IP address and a selection of UDP ports, NAT enables routers to share an association.
  • Using dynamic routing algorithms, it may select the most advantageous route over the internetwork.
  • By establishing collision domains and broadcast domains, it can minimise network traffic.
  • Enabling the feedback loop will make redundant pathways available.
  • Disadvantages of Routers:

  • A router costs more than a bridge or a repeater.
  • Not all network protocols are routable, and only those that are work with routers.
  • As a result of the need to examine data transmitted from the physical to the network layer, the router is slower than a bridge or repeater.
  • 4. Bridges

    When two subnetworks that use different protocols need to be connected, bridges are used. It combines two LANs to create an extended LAN. All packets are accepted by a bridge, which then amplifies and transmits them to the other side. The bridges are clever devices that only permit specific packets from them to flow. A bridge only allows packets from one network node to another to pass through.

    Types of Bridges:

  • Source Routing Bridges
  • Transparent Bridges
  • Advantages of Bridges:

  • It supports the expansion of the physical network.
  • With minimal segmentation, it lowers network traffic.
  • It establishes distinct collision domains. As fewer nodes share a collision domain, the available bandwidth for individuals nodes grows.
  • There are fewer collisions.
  • Disadvantages of Bridges:

  • It takes longer than repeaters because of filtering.
  • Broadcasts are not filtered by it.
  • In comparison, it costs more than repeaters.
  • 5. Repeater

    In the process of amplifying or regenerate a signals coming before retransmitting it, repeaters are network devices that operate at the physical layer of the OSI model.

    Depending on the technology or the channel’s characteristics, an electrical signal delivered across a channel weakens. The signal is amplified by repeaters before being retransmitted. Even signals that have been distorted by transmission loss can be recreated by digital repeaters. Therefore, repeaters are frequently used to connect two LANs and create a big single LAN.

    Types of Repeater:

    There are many different types of repeaters available, and each one serves a specific purpose in networking. Similarly to how different types of signals regenerate using different repeaters, different types of networks and LAN domains use different repeaters.

    For signals to regenerate, two types of repeaters are used:

  • Analog Repeaters
  • Digital Repeaters
  • For the different types of networks that they connect, two types of repeaters are used:

  • Wired Repeaters
  • Wireless Repeaters
  • For different LANs domains, they use two types of repeaters:

  • Local Repeaters
  • Remote Repeaters
  • Advantages of Repeaters:

  • Repeaters may easily increase the length or coverage area of networks and are easy to deploy.
  • They are reasonably less costly.
  • Repeaters don’t need any extra processing. If performance declines, that is the only situation in which they need to be looked into.
  • Signals can be connected via a variety of cables
  • Disadvantages of Repeaters:

  • Repeaters are unable to link diverse networks.
  • They cannot differentiate between signal and noise.
  • They are unable to lessen network congestion or traffic.
  • The number of repeaters that can be placed on the majority of networks is limited.
  • 6. Modem

    The digital data streams are transformed into analogue data signals via a modem. The signal between your phone connection and your computer is modulated and demodulated by the modem. Modulation and demodulation are hence abbreviated as “modem”.

    When you try to upload data from your home computer to the internet, the modem receives the digital signal and converts it into an analogue signal that the phone network can use.

    In a similar way, when computers request data from the internet, the modem receives the analogue data transmission over the phone and transforms it into a digital signal that the computer can use.

    Advantages of Modem:

  • Your system’s connection to the internet, or “world wide web” depends heavily on your modem.
  • Fax transmission and reception are both possible with modern modems.
  • As the number of services offered by the modem increases, so does its price.
  • 7. Gateway

    A gateway is a telecommunications network mode that joins two networks using various transmission protocols. A gateway acts as a network’s entry and exit points because all data must travel through it or connect with it before being forwarded.

    A gateway is frequently described as being made up of a modem and a router. Regardless of whether data is transferred internally or outside, the gateway manages all network traffic. It is implemented at the network’s edge. When a network wants to communicate with another, the data packet is sent to the gateway, where it is then routed via the most efficient path to the desired location.

    Types of gateway:

  • Unidirectional Gateways
  • Bidirectional Gateways
  • Advantages of Gateway:

  • Gateway offers improved connectivity to many networks, and it also aids in network scaling by connecting several computers and other systems.
  • The gateway can intercept all information from computers and other systems, allowing your network to be more flexible.
  • Another important capability of a gateway is filtering which it can carry out by analysing each data packet as it passes through the gateway.
  • Disadvantages of Gateway:

  • Network gateways require extra time to translate the information; hence, they cannot send information instantly . It accesses older cached information that has not been cleared.As a result, it can take longer to produce an accurate result.
  • Over the network that connects them, every computer uses a unique protocol. Every computer has to conduct its own troubleshooting whenever a problem arises.
  • By default, gateways are set up on the router.Installing them is becoming increasingly challenging for network administrators.As a result, its cost can go up.
  • 8. Wireless LAN Controller

    A Wireless LAN Controller (WLC) is a centrally located network device that the network administrator or network operations centre uses in conjunction with the Lightweight Access Point Protocol (LWAPP).

    These network access points, often known as “fat” access points, are controlled, run, and configured separately. The WLC manages the wireless access point settings automatically.

    Advantages of Wireless LAN Controller:

  • With the use of a wireless controller, all the access points can be configured at once.
  • Client service cannot be offered by access points that are not linked to the wireless controller.
  • To stop malicious access points from being on the network, WLC can authenticate access points.
  • Disadvantages of Wireless LAN Controller:

  • The data transfer rate drops as there are more connected devices.
  • Communication may be hindered by rain or thunder.
  • Because of its low security, it allows attackers to view the transmitted data.
  • In comparison to employing fibre optics, the environment may potentially harm signals.
  • 9. Access Point

    The Wireless Local Area Network (WLAN), which is frequently used in large offices and structures with enlarged business, is created by a Wireless Access Point (WAP).

    The wired networks are linked to the wireless client by a wireless AP. Mobile users may access the network more easily, which boosts productivity and lower infrastructure costs.

    A wireless access point (WAP) is a piece of hardware or a set-up LAN node that facilitates Bluetooth or Wi-Fi communication between wired networks and wirelessly enabled devices. Devices can connect to the internet or a network more easily thanks to WAPs’ radio transmitters and antennae.

    Advantages of Access Point:

  • Access is increased, so more user can able to connect.
  • Transmission range is increased, access point can provide up to 100 - 300 metres of coverage.
  • It provides versatile networking.
  • It gives permission to connect multiple access points.
  • Disadvantages of Access Point:

  • High price
  • Not suitable to use alone for personal use.
  • Terrible stability
  • 10. Load Balancer

    A load balancer serves as the “traffic police” at the front of all servers, distributing client requests across all servers equipped to handle them in a way that maximises speed and capacity utilisation and makes sure that no server is overworked, which can result in performance degradation.

    The load balancer routes traffic to the active servers in case one server goes offline. The load balancer initiates requests to a new server when it is added to the server group.

    Advantages of a Load balancer:

  • Can evenly distribute the work to the primary service server.
  • Minimize service interruptions.
  • Access to services is made faster because it can route requests to servers that want quick responses.
  • Disadvantages of a Load balancer:

  • Increases the price when two or more servers are needed.
  • All of the virtual systems on the host server cannot be used if it has a problem.
  • A virus attack or a hacker will attempt to consolidation of all data onto a single server.
  • Conclusion:

    We discussed the most commonly used networking devices in any organisation in this blog. Also, lots of other devices are used in networking. If a candidate takes a CCNA or CCNP course, they will learn in depth. In this course, every networking device that is used is described, like the routing tables of routers, how classful addresses work, subnetting, and many more.

    These abilities are useful in any IT field, whether the candidate is a developer, cloud engineer, or a cyber security analyst. Without a basic understanding of networking, candidates will not be able to understand any concept in depth.

    If a candidate wants to get a better salary, then they must have a basic understanding of networks. Best of luck!


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