The Huawei S1720 28GWR PWR 4TP AC is a managed switch that provides a range of features and capabilities for network connectivity and management. Here's a breakdown of the key parameters mentioned in the description:

1. 24 10/100/1000BASE T ports: This refers to the 24 Ethernet ports that support three different speeds   10 Mbps (Ethernet), 100 Mbps (Fast Ethernet), and 1000 Mbps (Gigabit Ethernet). The "T" stands for Twisted Pair, indicating that these ports use copper cabling.

2. 2 GE SFP ports: GE stands for Gigabit Ethernet, and SFP stands for Small Form factor Pluggable. These are two ports that can accommodate SFP modules, which are used for various applications such as fiber optic connections. Each of these ports supports Gigabit Ethernet speeds.

3. 2 dual purpose 10/100/1000 or SFP ports: These are versatile ports that can either function as standard 10/100/1000BASE T Ethernet ports or can accept SFP modules for different types of connections, similar to the GE SFP ports. This dual purpose functionality allows for greater flexibility in network design.

4. Fixed AC power: This indicates that the switch has a built in power supply that operates on Alternating Current (AC), which is the standard form of electrical power used in most buildings. Fixed power means it cannot be replaced with a different power supply; it's a permanent part of the device.

5. PoE+: PoE stands for Power over Ethernet, and the "+" indicates that this is the enhanced version of PoE, known as PoE+ or Power over Ethernet Plus. This technology allows the switch to deliver power to other network devices, such as wireless access points or IP cameras, through the Ethernet cables, eliminating the need for separate power supplies for those devices. PoE+ provides higher power output compared to standard PoE.

6. AC: This is a repetition of the "Alternating Current" power supply type mentioned earlier.

The Huawei S1720 28GWR PWR 4TP AC switch is designed for small to medium sized enterprise networks, offering a combination of high speed connectivity options, power over Ethernet capabilities, and flexible port configurations to meet various networking needs.

Huawei FutureMatrix S1730S-S8P4S-A1 switch supports 8 PoE+ 10/100/1000BASE-T ports, 4 1000BASE-X GE SFP ports, fixed AC power：