How Do Switches Work and What Types Are They Available?
A switch is a network device that operates as an electrical (optical) signal forwarder. It can offer a dedicated electrical route to any two network nodes connected through the switch. The most prevalent one is the Ethernet switch. Some of the most common ones are telephone voice switches and fiber optic switches.
For instance, suppose that you have moved into a new apartment and share one broadband internet line with several other roommates. Everyone has their own device be it a laptop, smartphone or play station and they all want free access to the Internet. This problem can be solved by using a switch.
The connection consists of a telecom broadband internet in the apartment that requires connecting to several instruments at once so as multilateral users can access the Internet. In this regard, as is the case with a college dormitory using switch can also constitute an ideal solution to such dilemma.
How Does a Switch Work?
The operation of switching is done by building and holding a MAC table. As any device is connected to its local port on the switch, it will get recorded with MAC address and corresponding information of that point which creates a table based on identic fame.
If a device requires to send the packet of data transmission through MAC addresses, switch is look upon in all processes and by seeing its port which correlates with it then only sends or delivers from that particular and associated port only. This method helps to eliminate congestion in the network and make it more efficient for sending data.
In a word, the switch implements efficient network communication through intelligent discovery of each device’s MAC address to create a MAC table and direct packets sent on ports where target devices are assigned.
What Are the Common Classifications of Switches?
Although the terminology has a variety of names for switches, the current common classification is based on the network structure, which usually includes access layer switches, aggregation layer switches, and core layer switches. Next, we will focus on analyzing the options for these three types of switches.
Access layer, aggregation layer, and core layer constitute the three-layer architecture of the network, in which the core layer acts as the backbone network, the aggregation layer provides policy-based connectivity, and the access layer mainly connects the devices, similar to the organizational structure of a company’s top management, middle management, and grassroots employees each in their own way to collaborate to ensure the normal operation of the network.
- Access Layer Switches
Access layer switches mainly respond to the access needs of neighboring users. Typical applications include shared address, which facilitates users on the same LAN to access files under a specified path and improves daily work efficiency. In large networks, access layer switches also undertake user management and information collection tasks, such as user authentication and IP identification.
Selection advice: As access layer switches are in high demand, their main features are multi-port and low cost. When selecting, focus on the cost-performance factor and relatively low functional requirements.
- Aggregation Layer Switches
Converged layer switches act as the aggregation part of access layer switches and are used to convey core and access layer information. It is capable of implementing policies and performing functions such as routing between VLANs, workgroup access, and address filtering according to pre-set procedures.
Selection Advice: Since the aggregation layer switch is located in the middle of the network architecture, its performance requirements are higher than the access layer, with faster switching speeds to meet upload and download demands.
If the core layer switch has enough ports, good performance, and the transmission distance of the application environment is close, is it possible to omit the aggregation layer switch and connect the core switch to the access layer directly? It is possible. This is just like some small companies have only one manager with leadership, and others are equal, which can save a lot of intermediate costs, and at the same time the inspection and maintenance of network lines are more convenient.
- Core Layer Switches
Core layer switches need to fulfill many conditions, such as high reliability, high efficiency, manageability and low latency as backbone transmission network.
Selection Advice: When choosing core layer switches, you need to focus on throughput, bandwidth and other factors, and choose manageable switches with more than Gigabit or even 10 Gigabit to meet the needs of high-performance network transmission.
Summary
Ruijie is the top enterprise-class switch maker with excellent performance and reputation accumulated over the years, which is one of the top choices when we consider the switch as a product. Choose the best switch for your needs for greater efficiency.
