The **Cisco CBS350-48T-4R** is a managed Layer 3 switch from the Cisco Business 350 series. It is designed for small to medium-sized businesses that require high density, advanced security, and energy efficiency. --- ### ## Technical Specifications Overview | Feature | Specification | | :--- | :--- | | **Total Ports** | 52 | | **RJ-45 Ports** | 48 x 10/100/1000 Mbps (Gigabit Ethernet) | | **Uplink Ports** | 4 x 10G SFP+ (Small Form-factor Pluggable Plus) | | **Switching Capacity** | 176 Gbps | | **Forwarding Rate** | 130.94 Mpps (million packets per second) | | **Packet Buffer** | 3 MB | | **Flash Memory** | 256 MB | | **CPU RAM** | 512 MB | --- ### ## Key Electronic Components & Architecture #### 1. Networking Silicon (ASIC) The core of the unit is a specialized **Application-Specific Integrated Circuit (ASIC)**. Unlike a general-purpose PC processor, this chip is hard-wired to handle packet switching at "wire speed," ensuring low latency even when all 52 ports are active simultaneously. #### 2. Uplink Connectivity (SFP+ Modules) The "4R" designation refers to the four **10G SFP+ slots**. These allow for high-speed fiber optic or copper Twinax connections. * **Electronics:** These slots contain interface circuitry that converts electrical signals from the ASIC into optical signals (via transceivers) for long-distance data transmission. #### 3. Power Management * **Internal Power Supply:** This model uses a standard AC internal power supply (100-240V). * **Energy-Efficient Ethernet (IEEE 802.3az):** The electronic circuitry monitors link status and cable length to reduce power consumption on inactive or short-cable ports. #### 4. Cooling and Thermal Sensors The unit contains internal fans and thermal sensors that dynamically adjust the RPM based on the heat generated by the electronic components, preventing hardware degradation. --- ### ## Functional Features * **Layer 3 Routing:** Includes hardware-based static routing and dynamic routing (RIP). * **Hardware Security:** Features dedicated circuitry for **IEEE 802.1X** (port-based security), Access Control Lists (ACLs), and Denial-of-Service (DoS) prevention. * **Management Ports:** Includes a dedicated RJ-45 console port and a USB Type-A port for file management and firmware updates.