With Cisco Catalyst 3750 range has been around for many years,Cisco 3750 series became a flagship switch of Cisco Network Product. The new Catalyst 3750-X is the new kid on the Cisco block, and it combines plenty of stuff that will be familiar to users of its predecessors with some funky new features that are clearly a step forward.They are business class models of stackable (3750X) switches for the aggregation and access network layers.

The device comes in a number of flavours–between 12 and 48 ports, with or without Power over Ethernet. The Cisco 3750-X Series with StackWise Plus technology provides scalability, ease of management and investment protection for the evolving business needs. The Cisco Catalyst 3750-X enhances productivity by enabling applications such as IP telephony, wireless, and video for borderless network experience.

As with the Cisco 3750S the rear panel has a pair of "stack" ports. Each stack port provides a 16Gbit/s backplane connection, and by stacking your devices in a loop you end up with a resilient 32Gbit/s backplane.

Features of Cisco 3750 Switch:
24 and 48 10/100/1000 PoE+ and non-PoE models
Four Gigabit Ethernet (GbE) SFP or two 10GbE SFP+ uplink network modules
PoE+ with 30W power on all ports in 1 rack unit (RU) form factor
Dual redundant, modular power supplies and fans
Media Access Control Security (MACsec) hardware-based encryption
IPv4 and IPv6 routing, Multicast routing, advanced quality of service (QoS), and security features in hardware
Enhanced limited lifetime warranty (LLW) with next business day (NBD) advance hardware
Enhanced Cisco EnergyWise for operational cost optimization
USB Type-A and Type-B ports for storage and console respectively and an out-of-band Ethernet

The 3750-X is a really sensible evolution in an already popular family of switches in the Cisco family.

Tips: Customers can transparently upgrade the software feature set in the Cisco Catalyst 3750-X Series Switches through Cisco IOS Software activation.