Cisco WS-C3750-48PS-S 48 Ports Layer 3 Switch PoE+ 1U Refurbished

In the realm of networking infrastructure, the Cisco WS-C3750-48PS-S stands out as a powerful and versatile solution. This Ethernet switch is designed to meet the demands of modern networking environments, offering a plethora of features including Power over Ethernet Plus (PoE+), Small Form-Factor Pluggable (SFP) ports, Layer 3 management capabilities, and a stackable design. This Ethernet switch is designed to meet the demanding needs of modern network infrastructures, offering a plethora of features and capabilities.

The inclusion of "4 Small Form-Factor Pluggable (SFP)" slots is another noteworthy aspect. SFP modules enhance the switch's flexibility by allowing the connection of fiber optic or copper uplink cables. This is especially useful for extending the network over longer distances.

The "48 Ports" in the model name indicates the switch's capability to support 48 Ethernet ports. What makes this switch stand out is its Power Over Ethernet Plus (PoE+) feature. This means the switch can deliver both data and electrical power over the Ethernet cables to connected devices like IP cameras, VoIP phones, and other PoE-enabled devices.

Being a manageable switch, the WS-C3750-48PS-S provides administrators with the ability to configure and monitor its settings. Additionally, the switch operates at Layer 3 of the OSI model, enabling it to make routing decisions and optimize network performance.

The term 'manageable' in the context of networking equipment refers to the device's ability to be configured and controlled. The Cisco WS-C3750-48PS-S is equipped with advanced management features, allowing network administrators to fine-tune its operation to suit specific requirements. This manageability is crucial for optimizing performance and ensuring security, and potential issues within the network.

The manageability of the Cisco WS-C3750-48PS-S extends beyond basic configuration. Remote management capabilities enable network administrators to monitor and control the switch from a central location. This is especially valuable in large or geographically dispersed networks, where efficient management is essential for maintaining optimal performance and security.

Quality of Service (QoS) is a crucial aspect of network management, prioritizing certain types of traffic to ensure a consistent and reliable user experience. The Cisco WS-C3750-48PS-S allows for granular QoS configuration, enabling administrators to prioritize critical applications and services over less time-sensitive traffic. This ensures that important data, such as voice and video communications, receives the necessary bandwidth and is processed with minimal latency.

Security is paramount in network environments, and the Cisco WS-C3750-48PS-S includes a range of security features to safeguard against unauthorized access and potential threats. These may include features such as access control lists (ACLs), port security, and secure shell (SSH) for encrypted remote access. The switch's manageability extends to security configurations, allowing administrators to implement and customize security measures based on the specific needs of the network.

The "Rack-mountable" attribute means the switch can be installed in standard server racks, saving space and promoting efficient cable management. The "1U" designation signifies that the switch takes up one rack unit of vertical space, contributing to its compact design. The physical form factor of the Cisco WS-C3750-48PS-S is designed with practicality in mind. Being rack-mountable means that it can be conveniently installed in standard equipment racks, optimizing space utilization in data centers or network closets. The 1U (1 Rack Unit) height ensures that the switch occupies minimal vertical space, leaving room for additional networking or server equipment in the rack.

When equipped with SFP modules supporting fiber optics, the switch can transmit data over longer distances with higher bandwidth, making it ideal for interconnecting switches in different parts of a building or even between buildings in a campus environment. SFP ports are commonly associated with fiber optic connections, providing the means for high-speed data transfer over longer distances compared to traditional copper connections. Fiber optic connections are immune to electromagnetic interference, making them ideal for environments where interference is a concern. The Cisco WS-C3750-48PS-S, with its SFP ports, can seamlessly integrate into networks that require the advantages of fiber optic technology.

In addition to fiber optic connectivity, SFP ports are often used for Gigabit Ethernet connections. This is particularly valuable in scenarios where high-speed data transfer is crucial, such as in data centers or for interconnecting switches in a network. The Gigabit Ethernet support provided by the SFP ports ensures that the Cisco WS-C3750-48PS-S can meet the bandwidth demands of modern applications and services.

SFP modules supporting copper provide the flexibility to use traditional Ethernet cables for shorter connections. This is beneficial when dealing with devices in close proximity, and it also simplifies the upgrade process for existing networks.

By allowing multiple switches to be stacked together, the WS-C3750-48PS-S facilitates scalability. This means that as the network grows, additional switches can be seamlessly added to the stack, expanding the overall capacity and ensuring that the network can adapt to evolving needs.

Stacking switches simplifies network management. Instead of configuring and monitoring each switch individually, administrators can manage the entire stack as a single entity. This streamlined approach reduces the complexity of network administration and enhances overall efficiency.

In a stacked configuration, if one switch in the stack fails, the others can continue to operate, ensuring high availability. This is a critical feature for mission-critical environments where network downtime is not an option.

One of the standout features of the WS-C3750-48PS-S is its Layer 3 routing capabilities. Unlike Layer 2 switches that operate primarily at the data link layer, Layer 3 switches have the additional capability to route data based on IP addresses. This routing functionality enhances the switch's ability to intelligently manage traffic within the network.

• Improved Network Efficiency: Layer 3 switching enables the switch to make routing decisions at wire speed, significantly improving the efficiency of data transfer within the network. This is particularly beneficial in environments with high volumes of inter-VLAN traffic.
• Enhanced Network Segmentation: Layer 3 switches can divide a network into multiple virtual LANs (VLANs), each with its own IP subnet. This segmentation enhances security and performance by isolating broadcast domains and optimizing traffic flow.
• Inter-VLAN Routing: The WS-C3750-48PS-S can perform inter-VLAN routing, allowing communication between different VLANs. This capability is essential in complex network architectures where multiple VLANs are used to segregate and organize network traffic.
• Support for IP Multicast: Layer 3 switches like the WS-C3750-48PS-S can support IP multicast, enabling efficient distribution of multimedia content such as video streams. This is valuable in applications like video conferencing and streaming services.

• Manufacturer: Cisco
• Model Number or SKU# WS-C3750-48PS-S
• Product Series: 3750
• Product Type: Layer 3 Switch

• Total Number of Ports: 48
• Media Type: Supported Twisted Pair
• Ethernet Technology: Fast Ethernet
• Network Technology: 10/100Base-TX
• Layer Supported: 3
• Expansion Slot Type: SFP
• Number of SFP Slots: 4

• Manageable: Yes
• SNMP: v1, v2c, v3
• RMON: 1, 2

• PoE (RJ-45) Port: Yes
• Input Voltage: 110 V AC
• Input Voltage: 220 V AC
• Power Source: Power Supply

• Full duplex capability, layer 3 switching, layer 2 switching, auto-sensing per device,
• DHCP support, auto-negotiation, ARP support, trunking, VLAN support,
• Auto-uplink (auto MDI/MDI-X), IGMP snooping, Syslog support, manageable,
• Intrusion Detection System (IDS), Broadcast Storm Control, Multicast Storm Control,
• Unicast Storm Control, Spanning Tree Protocol (STP) support, Rapid Spanning
• Tree Protocol (RSTP) support, DHCP snooping, Dynamic Trunking Protocol (DTP) support,
• Port Aggregation Protocol (PAgP) support, Access Control List (ACL) support, Quality of Service (QoS),
• Jumbo Frames support, Dynamic ARP Inspection (DAI), Per-VLAN Spanning Tree Plus (PVST+)

• IEEE 802.3u, IEEE 802.1D, IEEE 802.1Q, IEEE 802.1p,
• IEEE 802.3af, IEEE 802.3x, IEEE 802.3ad (LACP), IEEE 802.1w,
• IEEE 802.1x, IEEE 802.1s

• Standard Memory: 128 MB
• Memory Technology: DRAM
• Flash Memory: 16 MB

• Min Operating Temperature: 32 °F
• Max Operating Temperature: 113 °F
• Humidity Range Operating: 10 - 85%
• Max Altitude Operating: 9840 ft

In general, the Cisco WS-C3750-48PS-S Ethernet switch is a versatile and powerful networking device that caters to the demands of modern network infrastructures. Its combination of Power Over Ethernet Plus (PoE+), Small Form-Factor Pluggable (SFP) slots, manageability, rack-mountable design, 1U form factor, and stackable configuration makes it a valuable asset for a wide range of applications. Whether you are looking to deploy a robust network in an enterprise setting or seeking to enhance the efficiency of your existing infrastructure, the WS-C3750-48PS-S stands as a reliable and feature-rich solution in the world of Ethernet switches.