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Thursday, 30 May 2019

What is a network switch, and do you need it?

Switch in English




Switch-in-English
Switch-in-English




To understand basic networking, you should first answer this question- What is the network switch?

Most business networks today use the switch to add computers, printers, phones, cameras, lights and servers to the building or premises.

A switch acts as a controller, so that network devices can efficiently communicate with each other. Through information sharing and resource allocation, switches save money of business and enhance employee's productivity.

A switch can be a valuable asset for networking. Overall, they can increase the efficiency and speed of your network. However, switching should not be seen as a treatment for network issues. Before incorporating network switching, you should first ask yourself two important questions: First, how can you tell if switching to your network will benefit? Second, how would you add switches to your network design to provide the most benefits?

This tutorial has been written to answer these questions. Also, we describe how switches work, and how they can harm and benefit your networking strategy. We will also discuss various types of networks so that you can profile your network and get an idea of ​​the potential benefits of network switching for your environment.



Network Switch



A network switch is a small hardware device that centralizes communication between multiple connected devices in a local area network (LAN).

Several years ago, stand-alone Ethernet switch devices were commonly used on home networks when home broadband routers became popular. Modern Home Router integrates the Ethernet switch directly into the unit in one of its main functions.

High-performance network switches are still widely used in corporate networks and data centers. A network switch is sometimes known as the switching hub, the bridging hub, or the Mack Bridge.



Network Switch Meaning




Network switches are one of the most basic components of any network. They are present in Layer 2 or Layer 3 of the OSI model. 99% of the time they run Layer 2.

They usually have 4 to 48 ports. Some things are how they work, they go in, but basically, they are the first device in the network that is connected to install your computer network.

For more information on how a switch works, I tried to give you enough detail without teaching you the completeness of networking theory. 🙂

Each computer has a network card. That network card is assigned an IP address to communicate with a local network (and the Internet).

What is an IP address? To know everything about a short guide IP address

There is also a MAC address in the network card of the computer, laptop or any other device. This is an address that is inserted into the network card and (for this explanation) is irreversible.

Each network connected device has a unique MAC address and (technically) never duplicated.

MAC Address in English! What is MAC Address? Where is it used?

So when you connect your PC or any device to the network, its MAC address registers with the switch. So switch now knows who you are and where you are.

When your computer first speaks to the switch, it says "Hi, I'm 1 computer. My MAC Address is 0000.5478.1289.RHRDG. "

In response to this, "Hello I see that you have been plugged in port 24. I have assigned the MAC address port 24. "responds with.

The switch creates notes in a file named ARP Table to track which port the computer is plugged in. This ARP table is like your address book, so you know that Sameer is in Indore and Sameera is in Varanasi.

OK, similarly the switch shows the ARP table that the computer has 1 in port 10 and the computer has 2 in port 15 and so on.


About Network Switches



Switching capabilities are available for many types of networks, including ATM, Fiber Channel, and Token Ring; Ethernet switches are the most common types.

mainstream Ethernet switches inside the rod band router support Gigabit Ethernet speed according to the personal link, but the high-performance switch in the data centers usually supports up to 10 Gbps per link.

Various models of network switches support different devices of connected devices. Consumer-grade network switches provide either four or eight connections for Ethernet devices, while corporate switches typically support between 32 and 128 connections.

Switches can connect to each other extra, a daisy-chaining method for connecting large numbers of devices to a LAN.



Types of Switch

After this, understand different types of ethernet switches and their capabilities.




1) Unmanaged Switches:



An unmanaged switch is not designed to configure, so you do not have to worry about installing it properly or setting it up. Unmanaged switches have fewer features and fewer network coverage than managed switch.

These types of switches are usually used for homes and small businesses. This means that there are no settings or special features in the switch itself, and it exists only to add more Ethernet ports to your network. Your router continues to handle your internet connection so that your devices communicate with each other and ensure that what some devices can do via the parental control or other settings - the switch is invisibly invisible.



2) Managed Switches:




Managed network switches can be configured. It offers more protection, flexibility, and efficiency than unmanaged switches. You can monitor and adjust locally or remotely managed switches, which gives you more network control.

Management provides benefits in many networks. A large network of mission-critical applications is managed with many sophisticated tools, using SNMP to monitor the health of tools on the network. The networks using SNMP or RMON (the extension of SNMP that provides much more data when using less network bandwidth) will manage either the device or the more important areas.



Advantage of Switch



Switches replace hubs in networking designs, and they are more expensive. So why are there a huge number of sales in the desktop switching market? The price of the switch is rapidly declining, while the hub is a mature technology with a small price drop. This means that there is very little difference between the cost of the switch and the cost of the hub.

Since the switches themselves learn, it is easy to install them as a hub. Just plug them in. And they work on the same hardware layer as the hub, so there is no protocol issue.

There are two reasons for adding switches to the network design. First of all, the switch breaks a network into several small networks so that the number of distance and repeaters can be reduced. Second, it separates traffic by dividing it equally and relieves the collisions generated by the network crowd.

It is very easy to identify the need for distance and repeaters and to understand this advantage of network switching. But the second benefit, relief from the multitude of the network, is difficult to identify and it is difficult to understand the degree through which the switch will help in the display. Since all switches add small latency to packet processing, so installing unnecessary switches in the network can actually slow the performance of the network

Additional thoughts for network switches
Now you have a basic breakdown of different types of switches, here are some other useful things to consider:


i) Number of ports




Switches can range from 5-port to 52-port configurations. When considering the number of ports you need, you should think about the number of users in your network. The larger your organization, the more ports you'll need.



ii) speed




Fixed configuration switches come in Fast Ethernet (10/100 Mbps), Gigabit Ethernet (10/100/1000 Mbps), Ten Gigabit (10/100/1000/10000 Mbps) and 40/100 Gbps Speed.

If all this seems confusing, the biggest thing to do when determining the speed is that the users are needed on the network. Will they transfer large amounts of data? Then Gigabit Ethernet or Fast is required.

iii) PoE vs non-PoE



Power over Ethernet (PoE) allows you to power your data traffic on a cable such as an IP phone or wireless access point. If you have a large network, PoE can provide flexibility by allowing you to place endpoints anywhere in the office. It is especially easy at places where power outlets are difficult to run.



iv) Stackable vs Standalone



Is your network growing fast? Then you should go with a stackable switch. The standalone switch needs to be configured individually, and Troubleshooting also needs to be controlled on an individual basis.

Stable switches allow multiple configurations to configure as if they are a unit. One advantage is that they can be configured. In case of failure of the port or cable, switches stack automatic bud failure will be rearranged around.



Layer 3 Switches




Traditional network switches operate on Layer 2 data link layers of the OSI model. Layer 3 switches that mix switches and router's internal hardware logic in a hybrid device, have also been deployed on some enterprise networks.

Compared to conventional switches, Layer 3 provides better support for the Virtual LAN (VLAN) configuration.



How to choose the right network switch




If you do not remember anything else, know that the best switch for you is probably a simple, unnamed network switch. The probability of the price you pay is determined by how many ports and their speed are in your switches.

For example, five-port switches will cost a lot less than 24-port switches, but if you have several wired devices that you need to connect to, then you have to take a 24-port switch. Similarly, the possibility of a fast Ethernet switch will be less than a Gigabit Ethernet switch.

If you are already scratching your head, do not worry. In any particular order, let us know what you need to know.
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1) Number of ports




First of all, you would like to find out how many ports of your switch are. If you have only a handful of devices that require ethernet connectivity, you can go with five-port switches: In this, you can connect four wired devices and a router.



2) Gigabit vs. Fast Ethernet




Use Gigabit Ethernet as long as possible. Your router comes with the Gigabit Ethernet port. Using this can increase the upload and download speed tenfold.

Depending on the brand, you can not save that money going to the Fast Ethernet on Gigabit, and Gigabit Networking is an area where it never hurts for future proof.

Yes, you will be able to stream 4K video from your Ethernet network to your storage device on Fast Ethernet.

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