D-Link 30-Port Stackable Multi-Gigabit Managed Switch

Management features
Switch type What switch device has, managed or unmanaged.	Managed
Switch layer A network switch is a computer networking device that links networking segments. A switch has different layers, such as layer 2 (a network bridge, operating at the data link layer, interconnecting a small number of devices) and layer 4 (can act as a firewall, amongst other things).	L3
Quality of Service (QoS) support
Web-based management Using a website/web application to manage something.

Ports & interfaces
Basic switching RJ-45 Ethernet ports quantity The number of basic switching RJ-45 Ethernet ports (sockets).	26
Basic switching RJ-45 Ethernet ports type The type/category of basic switching RJ-45 Ethernet ports (sockets).	2.5G Ethernet (100/1000/2500)
Console port	RJ-45
SFP28 ports quantity	4
USB 2.0 ports quantity Number of USB 2.0 ports (connecting interfaces) in the device. USB 2.0 was released in April 2000 (now called "Hi-Speed"), adding higher maximum signaling rate of 480 Mbit/s (effective throughput up to 35 MB/s or 280 Mbit/s), USB 2.0 ports are usually black.	1

Network
Networking standards The way in which the network is working, e.g. IEEE 802.11a, IEEE 802.11b, IEEE 802.11g.	IEEE 802.1AX, IEEE 802.1D, IEEE 802.1p, IEEE 802.1s, IEEE 802.1v, IEEE 802.1w, IEEE 802.3af, IEEE 802.3at, IEEE 802.3bt, IEEE 802.3x
10G support The product can use Oracle 10G, which is a database management system introduced in 2003.
Port mirroring
Flow control support
Link aggregation
Head-of-line (HOL) blocking
VLAN support A Virtual Local Area Network (VLAN) consists of a group of computers and switches that can be physically distributed over different networks and buildings, but form one LAN on a logical level.
Virtual LAN features	MAC address-based VLAN, Multicast VLAN, Port-based VLAN, Private VLAN, Voice VLAN
Number of VLANs	4000

Data transmission
Switching capacity The data transfer capacity of the switch per second.	400 Gbit/s
Forwarding rate	298 Mpps
MAC address table The MAC address is the 'Media Access Control Address'. It is a unique address given to a network interface controller (NIC) in a device. A MAC address table shows the addresses in a table format.	32768 entries
Number of queues	8
Jumbo frames support
Packet buffer memory	4 MB

Security
DHCP features	DHCP guarding, DHCP server, DHCP snooping
Access Control List (ACL)
Access Control List (ACL) egress	1024
Access Control List (ACL) ingress	3072
IGMP snooping
SSH/SSL support
Loop protection
Authentication	Guest VLAN, MAC-based authentication, Port-based authentication, Web-based authentication
Authentication type Authentification means proving identity to gain access to sometheng. There are various types of authentification exist e.g. access card, password, biometric data.	IEEE 802.1x, RADIUS, TACACS+

Multicast features
Multicast support

Protocols
GARP VLAN Registration Protocol (GVRP)

Design
Rack mounting The type of mounting that can position devices in a shelving system (rack).
Stackable Devices can be placed on top of each other.
Form factor The shape or design of the product.	1U
Product colour The colour e.g. red, blue, green, black, white.	Black
Number of fans The quantity of fans (apparatus with rotating blades that creates a current of air for cooling or ventilation).	2 fan(s)

Performance
Physical stacking (units)	9
Virtual stacking (units)	32
Mean time between failures (MTBF) Statistical model used to indicate product/mechanism reliability; expressed in hours and percentage of duty cycle. This number (in hours) does not indicate the mean time before failure for a single unit/mechanism.	277222.63 h

Power
Power source What is providing power for the product e.g. mains electricity.	AC/DC
Power supply included There is a power supply with this product.
Redundant power supply (RPS) support Additional power supply which can run a computer if the main power supply fails.
AC input voltage The voltage of the AC electricity that is inputted into the product.	100 - 240 V
AC input frequency	50/60 Hz
Power consumption (max) The maximum amount of power used by the device.	1211.5 W

Power over Ethernet (PoE)
Power over Ethernet (PoE) The device supports Power over Ethernet (PoE), which is one of several standardized or ad-hoc systems which pass electrical power along with data on Ethernet cabling. This allows a single cable to provide both data connection and electrical power to devices such as wireless access points or IP cameras.
Power over Ethernet plus (PoE+) ports quantity	16
Power over Ethernet 4PPoE (PoE++) ports quantity	8
Total Power over Ethernet (PoE) budget	740 W

Operational conditions
Operating temperature (T-T) The minimum and maximum temperatures at which the product can be safely operated.	0 - 50 °C
Storage temperature (T-T) The minimum and maximum temperatures at which the product can be safely stored.	-40 - 70 °C
Operating relative humidity (H-H)	10 - 90%
Storage relative humidity (H-H)	5 - 90%
Heat dissipation The heat generated by the power supply.	4137.73 BTU/h

Weight & dimensions
Width The measurement or extent of something from side to side.	440 mm
Depth The distance from the front to the back of something.	470 mm
Height The measurement of the product from head to foot or from base to top.	44 mm
Weight Weight of the product without packaging (net weight). If possible, the net weight is given including standard accessories and supplies. Please note that sometimes the manufacturer leaves out the weight of accessories and/or supplies.	6.54 kg

Certificates
Certification	FCC Class A, CE Class A, VCCI Class A, IC, RCM, BSMI