Equipped with a high performance switching engine, the 20-Port All-Gigabit Managed Switch performs optimally. It has low transmission delay, large buffer and is highly reliable. It also has a strong switching capability and optimizes transmission performance when accessing Ultra HD videos. With its full metal design and fanless design, the device has great heat dissipation and is low power consumption,
working in environments ranging from –10°C to 55°C (+14°F to +131°F). With protection against overvoltage, EMC and overcurrent from power input terminals, the switch effectively resists interference from static electricity, lightning, and pulses. It also has powerful network management functions, supporting IGMP Snooping, Link Aggregation, QoS, LLDP, STP/RSTP, Web.

Link Aggregation
Combines multiple physical links into one virtual channel for dynamic redundancy and load balancing, ensuring that the connection remains stable.

Quality of Service (QoS)
Uses mechanisms designed to control bandwidth, delay, jitter, and loss to ensure the performance of services when the capacity is limited.

Link layer discovery protocol (LLDP)
Enables network devices to advertise their information mutually, allowing you to conveniently monitor and manage devices in the local topology. This makes it easy for administrators to effectively perform troubleshooting.

Spanning Tree Protocol (STP)
Uses algorithms that calculate the best loop-free path through a Layer 2 network while providing path redundancy to prevent the occurrence of broadcast storms and enhance the stability of operations and services.

IGMP snooping
Listens to multicast traffic, and solely forwards information to registered clients based on the multicast forwarding table. This ensures the safety of information and improves network efficiency.

Fanless Design
The fanless design reduces noise, enhances user experience, reduces mechanical losses and improves service life to a certain extent.

Dahua Technology SG4020. Switch type: Managed, Switch layer: L2. Basic switching RJ-45 Ethernet ports type: Gigabit Ethernet (10/100/1000), Basic switching RJ-45 Ethernet ports quantity: 18, Console port: RJ-45. Full duplex. MAC address table: 8000 entries, Switching capacity: 56 Gbit/s. Networking standards: IEEE 802.1x, IEEE 802.3, IEEE 802.3ab, IEEE 802.3ad, IEEE 802.3u, IEEE 802.3x, IEEE 802.3z. DC input voltage: 12 V. Rack mounting, Form factor: 1U

Switch type	Managed
Switch layer	L2
Quality of Service (QoS) support	Yes
Web-based management	Yes
Cloud-managed	No
Basic switching RJ-45 Ethernet ports quantity	18
Basic switching RJ-45 Ethernet ports type	Gigabit Ethernet (10/100/1000)
Installed SFP+ modules quantity	0
Gigabit Ethernet (copper) ports quantity	18
SFP module slots quantity	2
Console port	RJ-45
Networking standards	IEEE 802.1x, IEEE 802.3, IEEE 802.3ab, IEEE 802.3ad, IEEE 802.3u, IEEE 802.3x, IEEE 802.3z
10G support	No
Copper ethernet cabling technology	10BASE-T, 100BASE-TX, 1000BASE-T
Full duplex	Yes
Flow control support	Yes
Link aggregation	Yes
Spanning tree protocol	Yes
Ethernet LAN data rates	10,100,1000 Mbit/s
VLAN support	Yes
Virtual LAN features	Port-based VLAN, Tagged VLAN
Number of VLANs	4000
MAC address table	8000 entries
Switching capacity	56 Gbit/s
Forwarding rate	29.76 Mpps
Jumbo frames support	Yes
Jumbo frames	10000
Packet buffer memory	4.1 MB
DHCP features	DHCP client, DHCP server, DHCP snooping
IGMP snooping	Yes
Multicast support	Yes
Rack mounting	Yes
Form factor	1U
Product color	Black
Reset button	Yes
LED indicators	Yes
Fanless	Yes
Mean time between failures (MTBF)	467125.73 h
Power source	DC
Power supply included	Yes
DC input voltage	12 V
Power consumption (max)	24 W
Power over Ethernet (PoE)	No
Operating temperature (T-T)	-10 - 55 °C
Storage temperature (T-T)	-40 - 75 °C
Operating relative humidity (H-H)	10 - 90%
Storage relative humidity (H-H)	5 - 95%
Width	6.45" (163.8 mm)
Depth	17.3" (440 mm)
Height	1.72" (43.6 mm)
Weight	3.46 lbs (1.57 kg)
Package width	10.7" (271 mm)
Package depth	20.5" (520 mm)
Package height	4.21" (107 mm)
Package weight	4.96 lbs (2.25 kg)
Compliance certificates	CE
Sustainability compliance	Yes