Network Switches Guide: What They Are, How They Work and How to Choose the Right One

Network Switches Guide: What They Are, How They Work and How to Choose the Right One

Network switches are a key element of any modern network, whether it is for home use, small businesses or large companies. They ensure efficient communication between devices, allowing data to flow in an organised and secure environment.

Switches Definition

Switches are network devices that allow data to be exchanged between connected devices (e.g. computers, printers, servers). They work by allocating data packets exclusively to the destination device instead of transmitting them to all connected devices, as hubs do. This increases speed and reduces the chances of congestion.

Main Switches Categories:

1. Unmanaged Switches:
• Easy to use (plug-and-play).
• Without configuration possibilities.
• Ideal for small networks with basic needs.
2. Managed Switches:
• Provide full control of the network.
• Support VLANs, QoS, and remote management.
• Intended for businesses with complex needs.
3. Industrial Switches:
• Made from materials and technologies that withstand harsh environmental conditions.
• Connectivity to automation or industrial networks.
4. PoE Switches (Power over Ethernet):
• The same cable can be used for data transfer and power supply.
• Ideal for IP cameras, VoIP phones, and Access Points.

Switch Selection Criteria:

1. Number of ports

Determine the number of devices to be connected. For example:

• A small office may need 8-16 ports.
• A larger network may require 24-48 ports or more.

2. Network Speed

Consider your bandwidth needs:

• Fast Ethernet (100 Mbps): Useful in networks with low network requirements, where speed and performance needs are not so high.
• Gigabit Ethernet (1 Gbps): Ideal for networks where network speed and performance are vital, such as in business networks, home networks with high demand or applications that require high data throughput.
• 10 Gbps Ethernet: Effective where high speed and low latency are required, typically in large enterprises or networks supporting challenging applications.
• 25/40/100 Gbps Ethernet: Intended for central hub networks with increased data transfer, such as data centers.

3. PoE Support

Useful if you are using devices that do not have direct access to power, such as IP cameras, Access Points or IP Telephony. Reduces the need for extra cables.

4. Safety

Managed and smart switches offer features such as:

• Access Control Lists (ACL): Restrict access to specific devices.
• 802.1X Authentication: Requires authentication before connecting a device.

5. Management Option

• Managed Switches: They offer full control and customisation.
• Smart Switches: Provide limited management.
• Unmanaged Switches: Do not allow management.

6. Scalability

Choose switches that allow network expansion (stackable or modular switches) for future needs.

7. Network Reliability/Availability

Through the operation of the ring, reliable protection against failures and rapid recovery is ensured, which is crucial when uninterrupted network operation is required. This feature can be found on both Managed and Unmanaged Switches.

8. Environmental requirements

The ruggedness of industrial switches makes them ideal for applications in industrial environments where working conditions require exceptional resistance to temperatures, vibration, humidity and other environmental challenges. This allows them to deliver reliable and uninterrupted operation in demanding conditions, supporting critical data transmission networks.

9. QoS (Quality of Service)

Necessary if you are using applications that require constant data flow, such as VoIP and video conferencing. QoS prioritizes critical services.

Differences and Who They Target

Risks of Wrong Choice

1. Insufficient Network Resources: Incorrect estimation of ports or speed can cause delays.
2. Lack of Security: Unmanaged switches are more vulnerable to attacks.
3. Limited Scalability: Choosing non-scalable switches can hinder network growth.

Conclusion

Choosing the right switch depends on the needs, size and requirements of your network. For small businesses, an unmanaged switch may be sufficient, while for larger networks, the needs will likely require managed switches with security and QoS capabilities. Invest in solutions that provide flexibility and scalability to ensure an efficient and secure network.

Where you can find it

By choosing Professional Services for your switch purchase, you are guaranteed expert guidance/support, top quality products from the best manufacturers, ongoing pre- and post-purchase support, and competitive prices with guaranteed value. In addition, we have a full range of switch accessories to meet your every need. Contact us to find the perfect solution for you.