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20x 1G SFP ports plus 4x 10G SFP+ ports deliver flexible fiber networking for large organizations and ISPs, with room to scale high-speed uplinks and access links.4 combo ports let you choose RJ45 or SFP on the same port, making the CRS328 easier to adapt to mixed copper and fiber setups without changing hardware.Powered by a 98DX3236 chipset at 800 MHz and 512 MB RAM, this MikroTik switch is built for fast packet forwarding, stable VLAN handling, and efficient network operation.Non-blocking Layer 2 switching, 16K host table, up to 4,000 VLANs, STP/RSTP/MSTP, ACLs, Port Security, and IGMP Snooping help keep complex networks organized and reliable.1U rackmount design with dual 100-240 V power supplies, RJ45 console port, and dual boot support for RouterOS or SwOS gives admins flexible, dependable switch management.For Large Organizations & ISPsThe MikroTik CRS328-4C-20S-4S+RM is optimized for large organizations and ISPs, features twenty SFP ports, supporting speeds up to 1GbE, ideal for fiber optic or copper connections. It also integrates four advanced SFP+ ports, capable of managing up to 10GbE speeds—a staple in current network environments. Furthermore, this switch presents four versatile combo ports, enabling users to choose between RJ45 and SFP connections. Plus, the device's customization capabilities ensure a tailored network experience for users.Maximizing Network PotentialThe CRS328 runs on the robust 98DX3236 chipset, operating at 800 MHz. Complemented by a substantial 512 MB of RAM, this configuration is tailored for dedicated network devices, managing tasks from buffering and routing tables to overseeing the device's OS operations. The standout feature of this device, however, is its Marvell switch chip. Renowned in both consumer and enterprise spheres, Marvell's chips excel in efficiently handling data plane operations. This translates to swift packet forwarding, adept VLAN management, and an overall streamlined data traffic experience, ensuring your network realizes its full potential.Mastering Complex TopologiesThe CRS328 is designed for optimal performance: with its non-blocking Layer 2 switching, every port runs at top speed without congestion. Boasting a 16K host table, the switch can track a vast number of devices, ideal for large-scale networks. It supports up to 4,000 VLANs, ensuring thorough network segmentation. With the incorporation of STP, RSTP, and MSTP, network loops are effectively prevented. For security, the CRS328 uses Access Control Lists to filter traffic and Port Security to limit device access. The inclusion of Port Mirroring provides real-time network monitoring. Furthermore, the CRS328 utilizes enhanced jumbo frames for increased performance, manages multicast traffic via IGMP Snooping, and leverages IEEE 802.3ad to bond ports together, resulting in faster and more stable connections.Hands-On ManagementThe device is securely encased within a 1U rackmount frame, ensuring long-lasting durability. Equipped with two 100-240 V power supplies, it features failover capabilities to ensure uninterrupted operation. For administrators and IT professionals, a dedicated RJ45 console port provides a direct interface for in-depth network management and troubleshooting activities.The "Dual boot" functionality in the MikroTik CRS328 provides users with the option to select between two distinct operating systems based on their specific needs. Users can opt for RouterOS, renowned for its comprehensive routing features, or SwOS, tailored for switch-specific functions. This feature allows users to precisely configure functions ranging from basic port-to-port forwarding to more complex adjustments in MAC and IP headers.