Turn a single USB 2.0 port into 4 external USB 2.0 ports
Add an RS232 serial port with COM retention to your laptop or desktop computer through USB
4 Port Aluminum USB 2.0 Hub for Mac boasts an elegant aluminum design to match the style and color of all your Mac devices. Add up to 4 peripherals quickly and easily with the Sabrent 4-Port USB 2.0 Hub.
Add four external SuperSpeed USB 3.0 ports from a single USB connection
Sabrent HB-MAC3 - Hub - 4 x SuperSpeed USB 3.0 - desktop
Add four USB 3.0 ports to your laptop or Ultrabook using this slim, portable hub with an extended-length cable
IOGEAR's 4-Port USB 2.0 Hub provides 4 Hi-Speed USB 2.0 ports for your USB connectivity needs. This device is USB 2.0 compliant and provides a high-speed data transfer rate.
Kanex USB-C Portable Hub - Network adapter - USB Type-C - USB 3.0 x 3 + Gigabit Ethernet x 1 - black
D-Link xStack DGS-3620-28SC - Switch - L3 - managed - 20 x SFP + 4 x combo Gigabit GBIC + 4 x 10 Gigabit SFP+ - desktop
The energy-efficient NSS-G24D2P24 24-Port PoE+ Gigabit L2 Managed Network Switch does more than complete your home or office LAN.
The 24 Port Gigabit +4SFP Port POE Web Smart Ethernet Switch from V7 is designed to maximize system functionality. It features Power Over Ethernet (POE) ports that automatically detect and supply power with those 802.3at compliant Powered Devices.
GIGABIT-SX-LC MINI-GBIC # J4858C FOR HP PROCURVE (100% HP COMPATIBLE
CyberPower CP-H430P - Hub - 4 x SuperSpeed USB 3.0 - desktop
Connect five SATA drives to a single internal SATA 6Gbps host connection
StarTech.com 5 Port Unmanaged Industrial Gigabit PoE Switch with 4 Power over Ethernet ports - Switch - unmanaged - 4 x 10/100/1000 (PoE) + 1 x 10/100/1000 - wall-mountable - PoE (62 W)
Compulocks 8-Port USB Charging Power Strip - 8 USB Charging Ports with Surge Protection - Charging strip - 96 Watt - 2.4 A - 8 output connectors (USB (power only))
The SE4008 WRT 8-Port Gigabit Ethernet Switch from Linksys is designed for users who want to surf the web, create a strong local area network, and more.
The DGS-1210 Series is the latest generation of D-Link® Gigabit Web Smart Switches featuring D-Link Green 3.0 technology.
D-Link xStack DGS-3450 - Switch - managed - 48 x 10/100/1000 + 4 x shared SFP - desktop
Tripp Lite's B156-004-HD 4-Port DisplayPort 1.2 to HDMI MST Hub allows you to connect four independent HDMI monitors to a single DisplayPort output on your computer.
D-Link DGS-1100-26MP - Switch - smart - 24 x 10/100/1000 (PoE+) + 2 x combo Gigabit SFP - desktop - PoE+ (370 W)
D-Link DXS-3400-24SC - Switch - L3 Lite - managed - 20 x 10 Gigabit SFP+ + 4 x combo 10 Gigabit SFP+ - desktop, rack-mountable