Zyxel 8-port GbE Smart Managed PoE Switch with GbE Uplink
Zyxel 8-port GbE Smart Managed PoE Switch with GbE Uplink Original price was: 771,99 lei.Current price is: 711,00 lei.
Back to products
ZYXEL GS1920-48V2 48PORT GBE SWITCH
ZYXEL GS1920-48V2 48PORT GBE SWITCH Original price was: 2.205,00 lei.Current price is: 2.028,99 lei.

ZYXEL GS2220-28HP 28-PORT GBE SWITCH

SKU: GS2220-28HP-EU0101F

Apple Shopping Event

Hurry and get discounts on all Apple devices up to 20%

Sale_coupon_15

Original price was: 2.745,99 lei.Current price is: 2.526,00 lei.

3 in stock

3 in stock

20 People watching this product now!
  • Pick up from the Woodmart Store

To pick up today

Free

  • Courier delivery

Our courier will deliver to the specified address

2-3 Days

Free

  • DHL Courier delivery

DHL courier will deliver to the specified address

2-3 Days

Free

  • Warranty 1 year
  • Free 30-Day returns

Payment Methods:

Description

ZYXEL GS2220-28HP 28-PORT GBE SWITCH

Specification

Overview

LAN-Port-TypeGigabit
Power over Ethernet (PoE)Yes
Rack mountingYes
VLAN supportYes
Quality of Service (QoS) supportYes
Web-based managementYes
System event logYes
Switch typeManaged
Firmware upgradeableYes
MAC address filteringYes
Access Control List (ACL)Yes
Internal memory256 MB
Switch layerL2
Flow control supportYes
Rate limitingYes
IGMP snoopingYes
Storage relative humidity (H-H)10 – 95%
Installed SFP modules quantity
Configuring Location Settings (CLI)Yes
Basic switching RJ-45 Ethernet ports quantity24
10G supportNo
Broadcast storm controlYes
Spanning tree protocolYes
Authentication typeIEEE 802.1x, RADIUS
Multicast supportYes
MAC address table16000 entries
Packet buffer memory1.5 MB
Flash memory32 MB
Combo SFP ports quantity4
Copper ethernet cabling technology10BASE-TX, 1000BASE-T
Virtual LAN featuresPort-based VLAN, Private VLAN, Protocol-based VLAN, Voice VLAN
Switching capacity56 Gbit/s
Forwarding rate42 Mpps
DHCP featuresDHCP client, DHCP relay, DHCP snooping, DHCPv6 client, DHCPv6 relay
Security algorithmsSNMP, SNMPv2, SNMPv3, SSH-2, SSL/TLS
AuthenticationGuest VLAN, MAC-based authentication
Mean time between failures (MTBF)693245 h
Power over Ethernet (PoE) ports quantity24
Total Power over Ethernet (PoE) budget375 W
Heat dissipation1580.535 BTU/h
Porturi RJ 4524-28
Viteza TransferGigabit
Porturi SFPN/A
Montare in RackDa
ManagementDa
PoENu
Product colourBlack
Cables includedAC
Harmonized System (HS) code85176990
Operating temperature (T-T)0 – 50 °C
Storage temperature (T-T)-40 – 70 °C
Weight3.8 kg
Depth270 mm
Package height107 mm
AC input voltage100 – 240 V
Operating relative humidity (H-H)10 – 95%
Package depth355 mm
Height44 mm
Width441 mm
Package width616 mm
Noise level49.8 dB
Power consumption (max)463.5 W
Package weight4.97 kg
CertificationLVD, BSMI FCC 15 A, CE EMC A, BSMI ENC RoHS A
ProducatorZYXEL
Garantie60

Processor

LAN-Port-TypeGigabit
Power over Ethernet (PoE)Yes
Rack mountingYes
VLAN supportYes
Quality of Service (QoS) supportYes
Web-based managementYes
System event logYes
Switch typeManaged
Firmware upgradeableYes
MAC address filteringYes
Access Control List (ACL)Yes
Internal memory256 MB
Switch layerL2
Flow control supportYes
Rate limitingYes
IGMP snoopingYes
Storage relative humidity (H-H)10 – 95%
Installed SFP modules quantity
Configuring Location Settings (CLI)Yes
Basic switching RJ-45 Ethernet ports quantity24
10G supportNo
Broadcast storm controlYes
Spanning tree protocolYes
Authentication typeIEEE 802.1x, RADIUS
Multicast supportYes
MAC address table16000 entries
Packet buffer memory1.5 MB
Flash memory32 MB
Combo SFP ports quantity4
Copper ethernet cabling technology10BASE-TX, 1000BASE-T
Virtual LAN featuresPort-based VLAN, Private VLAN, Protocol-based VLAN, Voice VLAN
Switching capacity56 Gbit/s
Forwarding rate42 Mpps
DHCP featuresDHCP client, DHCP relay, DHCP snooping, DHCPv6 client, DHCPv6 relay
Security algorithmsSNMP, SNMPv2, SNMPv3, SSH-2, SSL/TLS
AuthenticationGuest VLAN, MAC-based authentication
Mean time between failures (MTBF)693245 h
Power over Ethernet (PoE) ports quantity24
Total Power over Ethernet (PoE) budget375 W
Heat dissipation1580.535 BTU/h
Porturi RJ 4524-28
Viteza TransferGigabit
Porturi SFPN/A
Montare in RackDa
ManagementDa
PoENu
Product colourBlack
Cables includedAC
Harmonized System (HS) code85176990
Operating temperature (T-T)0 – 50 °C
Storage temperature (T-T)-40 – 70 °C
Weight3.8 kg
Depth270 mm
Package height107 mm
AC input voltage100 – 240 V
Operating relative humidity (H-H)10 – 95%
Package depth355 mm
Height44 mm
Width441 mm
Package width616 mm
Noise level49.8 dB
Power consumption (max)463.5 W
Package weight4.97 kg
CertificationLVD, BSMI FCC 15 A, CE EMC A, BSMI ENC RoHS A
ProducatorZYXEL
Garantie60

Display

LAN-Port-TypeGigabit
Power over Ethernet (PoE)Yes
Rack mountingYes
VLAN supportYes
Quality of Service (QoS) supportYes
Web-based managementYes
System event logYes
Switch typeManaged
Firmware upgradeableYes
MAC address filteringYes
Access Control List (ACL)Yes
Internal memory256 MB
Switch layerL2
Flow control supportYes
Rate limitingYes
IGMP snoopingYes
Storage relative humidity (H-H)10 – 95%
Installed SFP modules quantity
Configuring Location Settings (CLI)Yes
Basic switching RJ-45 Ethernet ports quantity24
10G supportNo
Broadcast storm controlYes
Spanning tree protocolYes
Authentication typeIEEE 802.1x, RADIUS
Multicast supportYes
MAC address table16000 entries
Packet buffer memory1.5 MB
Flash memory32 MB
Combo SFP ports quantity4
Copper ethernet cabling technology10BASE-TX, 1000BASE-T
Virtual LAN featuresPort-based VLAN, Private VLAN, Protocol-based VLAN, Voice VLAN
Switching capacity56 Gbit/s
Forwarding rate42 Mpps
DHCP featuresDHCP client, DHCP relay, DHCP snooping, DHCPv6 client, DHCPv6 relay
Security algorithmsSNMP, SNMPv2, SNMPv3, SSH-2, SSL/TLS
AuthenticationGuest VLAN, MAC-based authentication
Mean time between failures (MTBF)693245 h
Power over Ethernet (PoE) ports quantity24
Total Power over Ethernet (PoE) budget375 W
Heat dissipation1580.535 BTU/h
Porturi RJ 4524-28
Viteza TransferGigabit
Porturi SFPN/A
Montare in RackDa
ManagementDa
PoENu
Product colourBlack
Cables includedAC
Harmonized System (HS) code85176990
Operating temperature (T-T)0 – 50 °C
Storage temperature (T-T)-40 – 70 °C
Weight3.8 kg
Depth270 mm
Package height107 mm
AC input voltage100 – 240 V
Operating relative humidity (H-H)10 – 95%
Package depth355 mm
Height44 mm
Width441 mm
Package width616 mm
Noise level49.8 dB
Power consumption (max)463.5 W
Package weight4.97 kg
CertificationLVD, BSMI FCC 15 A, CE EMC A, BSMI ENC RoHS A
ProducatorZYXEL
Garantie60

RAM

LAN-Port-TypeGigabit
Power over Ethernet (PoE)Yes
Rack mountingYes
VLAN supportYes
Quality of Service (QoS) supportYes
Web-based managementYes
System event logYes
Switch typeManaged
Firmware upgradeableYes
MAC address filteringYes
Access Control List (ACL)Yes
Internal memory256 MB
Switch layerL2
Flow control supportYes
Rate limitingYes
IGMP snoopingYes
Storage relative humidity (H-H)10 – 95%
Installed SFP modules quantity
Configuring Location Settings (CLI)Yes
Basic switching RJ-45 Ethernet ports quantity24
10G supportNo
Broadcast storm controlYes
Spanning tree protocolYes
Authentication typeIEEE 802.1x, RADIUS
Multicast supportYes
MAC address table16000 entries
Packet buffer memory1.5 MB
Flash memory32 MB
Combo SFP ports quantity4
Copper ethernet cabling technology10BASE-TX, 1000BASE-T
Virtual LAN featuresPort-based VLAN, Private VLAN, Protocol-based VLAN, Voice VLAN
Switching capacity56 Gbit/s
Forwarding rate42 Mpps
DHCP featuresDHCP client, DHCP relay, DHCP snooping, DHCPv6 client, DHCPv6 relay
Security algorithmsSNMP, SNMPv2, SNMPv3, SSH-2, SSL/TLS
AuthenticationGuest VLAN, MAC-based authentication
Mean time between failures (MTBF)693245 h
Power over Ethernet (PoE) ports quantity24
Total Power over Ethernet (PoE) budget375 W
Heat dissipation1580.535 BTU/h
Porturi RJ 4524-28
Viteza TransferGigabit
Porturi SFPN/A
Montare in RackDa
ManagementDa
PoENu
Product colourBlack
Cables includedAC
Harmonized System (HS) code85176990
Operating temperature (T-T)0 – 50 °C
Storage temperature (T-T)-40 – 70 °C
Weight3.8 kg
Depth270 mm
Package height107 mm
AC input voltage100 – 240 V
Operating relative humidity (H-H)10 – 95%
Package depth355 mm
Height44 mm
Width441 mm
Package width616 mm
Noise level49.8 dB
Power consumption (max)463.5 W
Package weight4.97 kg
CertificationLVD, BSMI FCC 15 A, CE EMC A, BSMI ENC RoHS A
ProducatorZYXEL
Garantie60

Storage

LAN-Port-TypeGigabit
Power over Ethernet (PoE)Yes
Rack mountingYes
VLAN supportYes
Quality of Service (QoS) supportYes
Web-based managementYes
System event logYes
Switch typeManaged
Firmware upgradeableYes
MAC address filteringYes
Access Control List (ACL)Yes
Internal memory256 MB
Switch layerL2
Flow control supportYes
Rate limitingYes
IGMP snoopingYes
Storage relative humidity (H-H)10 – 95%
Installed SFP modules quantity
Configuring Location Settings (CLI)Yes
Basic switching RJ-45 Ethernet ports quantity24
10G supportNo
Broadcast storm controlYes
Spanning tree protocolYes
Authentication typeIEEE 802.1x, RADIUS
Multicast supportYes
MAC address table16000 entries
Packet buffer memory1.5 MB
Flash memory32 MB
Combo SFP ports quantity4
Copper ethernet cabling technology10BASE-TX, 1000BASE-T
Virtual LAN featuresPort-based VLAN, Private VLAN, Protocol-based VLAN, Voice VLAN
Switching capacity56 Gbit/s
Forwarding rate42 Mpps
DHCP featuresDHCP client, DHCP relay, DHCP snooping, DHCPv6 client, DHCPv6 relay
Security algorithmsSNMP, SNMPv2, SNMPv3, SSH-2, SSL/TLS
AuthenticationGuest VLAN, MAC-based authentication
Mean time between failures (MTBF)693245 h
Power over Ethernet (PoE) ports quantity24
Total Power over Ethernet (PoE) budget375 W
Heat dissipation1580.535 BTU/h
Porturi RJ 4524-28
Viteza TransferGigabit
Porturi SFPN/A
Montare in RackDa
ManagementDa
PoENu
Product colourBlack
Cables includedAC
Harmonized System (HS) code85176990
Operating temperature (T-T)0 – 50 °C
Storage temperature (T-T)-40 – 70 °C
Weight3.8 kg
Depth270 mm
Package height107 mm
AC input voltage100 – 240 V
Operating relative humidity (H-H)10 – 95%
Package depth355 mm
Height44 mm
Width441 mm
Package width616 mm
Noise level49.8 dB
Power consumption (max)463.5 W
Package weight4.97 kg
CertificationLVD, BSMI FCC 15 A, CE EMC A, BSMI ENC RoHS A
ProducatorZYXEL
Garantie60

Video Card

LAN-Port-TypeGigabit
Power over Ethernet (PoE)Yes
Rack mountingYes
VLAN supportYes
Quality of Service (QoS) supportYes
Web-based managementYes
System event logYes
Switch typeManaged
Firmware upgradeableYes
MAC address filteringYes
Access Control List (ACL)Yes
Internal memory256 MB
Switch layerL2
Flow control supportYes
Rate limitingYes
IGMP snoopingYes
Storage relative humidity (H-H)10 – 95%
Installed SFP modules quantity
Configuring Location Settings (CLI)Yes
Basic switching RJ-45 Ethernet ports quantity24
10G supportNo
Broadcast storm controlYes
Spanning tree protocolYes
Authentication typeIEEE 802.1x, RADIUS
Multicast supportYes
MAC address table16000 entries
Packet buffer memory1.5 MB
Flash memory32 MB
Combo SFP ports quantity4
Copper ethernet cabling technology10BASE-TX, 1000BASE-T
Virtual LAN featuresPort-based VLAN, Private VLAN, Protocol-based VLAN, Voice VLAN
Switching capacity56 Gbit/s
Forwarding rate42 Mpps
DHCP featuresDHCP client, DHCP relay, DHCP snooping, DHCPv6 client, DHCPv6 relay
Security algorithmsSNMP, SNMPv2, SNMPv3, SSH-2, SSL/TLS
AuthenticationGuest VLAN, MAC-based authentication
Mean time between failures (MTBF)693245 h
Power over Ethernet (PoE) ports quantity24
Total Power over Ethernet (PoE) budget375 W
Heat dissipation1580.535 BTU/h
Porturi RJ 4524-28
Viteza TransferGigabit
Porturi SFPN/A
Montare in RackDa
ManagementDa
PoENu
Product colourBlack
Cables includedAC
Harmonized System (HS) code85176990
Operating temperature (T-T)0 – 50 °C
Storage temperature (T-T)-40 – 70 °C
Weight3.8 kg
Depth270 mm
Package height107 mm
AC input voltage100 – 240 V
Operating relative humidity (H-H)10 – 95%
Package depth355 mm
Height44 mm
Width441 mm
Package width616 mm
Noise level49.8 dB
Power consumption (max)463.5 W
Package weight4.97 kg
CertificationLVD, BSMI FCC 15 A, CE EMC A, BSMI ENC RoHS A
ProducatorZYXEL
Garantie60

Connectivity

LAN-Port-TypeGigabit
Power over Ethernet (PoE)Yes
Rack mountingYes
VLAN supportYes
Quality of Service (QoS) supportYes
Web-based managementYes
System event logYes
Switch typeManaged
Firmware upgradeableYes
MAC address filteringYes
Access Control List (ACL)Yes
Internal memory256 MB
Switch layerL2
Flow control supportYes
Rate limitingYes
IGMP snoopingYes
Storage relative humidity (H-H)10 – 95%
Installed SFP modules quantity
Configuring Location Settings (CLI)Yes
Basic switching RJ-45 Ethernet ports quantity24
10G supportNo
Broadcast storm controlYes
Spanning tree protocolYes
Authentication typeIEEE 802.1x, RADIUS
Multicast supportYes
MAC address table16000 entries
Packet buffer memory1.5 MB
Flash memory32 MB
Combo SFP ports quantity4
Copper ethernet cabling technology10BASE-TX, 1000BASE-T
Virtual LAN featuresPort-based VLAN, Private VLAN, Protocol-based VLAN, Voice VLAN
Switching capacity56 Gbit/s
Forwarding rate42 Mpps
DHCP featuresDHCP client, DHCP relay, DHCP snooping, DHCPv6 client, DHCPv6 relay
Security algorithmsSNMP, SNMPv2, SNMPv3, SSH-2, SSL/TLS
AuthenticationGuest VLAN, MAC-based authentication
Mean time between failures (MTBF)693245 h
Power over Ethernet (PoE) ports quantity24
Total Power over Ethernet (PoE) budget375 W
Heat dissipation1580.535 BTU/h
Porturi RJ 4524-28
Viteza TransferGigabit
Porturi SFPN/A
Montare in RackDa
ManagementDa
PoENu
Product colourBlack
Cables includedAC
Harmonized System (HS) code85176990
Operating temperature (T-T)0 – 50 °C
Storage temperature (T-T)-40 – 70 °C
Weight3.8 kg
Depth270 mm
Package height107 mm
AC input voltage100 – 240 V
Operating relative humidity (H-H)10 – 95%
Package depth355 mm
Height44 mm
Width441 mm
Package width616 mm
Noise level49.8 dB
Power consumption (max)463.5 W
Package weight4.97 kg
CertificationLVD, BSMI FCC 15 A, CE EMC A, BSMI ENC RoHS A
ProducatorZYXEL
Garantie60

Features

LAN-Port-TypeGigabit
Power over Ethernet (PoE)Yes
Rack mountingYes
VLAN supportYes
Quality of Service (QoS) supportYes
Web-based managementYes
System event logYes
Switch typeManaged
Firmware upgradeableYes
MAC address filteringYes
Access Control List (ACL)Yes
Internal memory256 MB
Switch layerL2
Flow control supportYes
Rate limitingYes
IGMP snoopingYes
Storage relative humidity (H-H)10 – 95%
Installed SFP modules quantity
Configuring Location Settings (CLI)Yes
Basic switching RJ-45 Ethernet ports quantity24
10G supportNo
Broadcast storm controlYes
Spanning tree protocolYes
Authentication typeIEEE 802.1x, RADIUS
Multicast supportYes
MAC address table16000 entries
Packet buffer memory1.5 MB
Flash memory32 MB
Combo SFP ports quantity4
Copper ethernet cabling technology10BASE-TX, 1000BASE-T
Virtual LAN featuresPort-based VLAN, Private VLAN, Protocol-based VLAN, Voice VLAN
Switching capacity56 Gbit/s
Forwarding rate42 Mpps
DHCP featuresDHCP client, DHCP relay, DHCP snooping, DHCPv6 client, DHCPv6 relay
Security algorithmsSNMP, SNMPv2, SNMPv3, SSH-2, SSL/TLS
AuthenticationGuest VLAN, MAC-based authentication
Mean time between failures (MTBF)693245 h
Power over Ethernet (PoE) ports quantity24
Total Power over Ethernet (PoE) budget375 W
Heat dissipation1580.535 BTU/h
Porturi RJ 4524-28
Viteza TransferGigabit
Porturi SFPN/A
Montare in RackDa
ManagementDa
PoENu
Product colourBlack
Cables includedAC
Harmonized System (HS) code85176990
Operating temperature (T-T)0 – 50 °C
Storage temperature (T-T)-40 – 70 °C
Weight3.8 kg
Depth270 mm
Package height107 mm
AC input voltage100 – 240 V
Operating relative humidity (H-H)10 – 95%
Package depth355 mm
Height44 mm
Width441 mm
Package width616 mm
Noise level49.8 dB
Power consumption (max)463.5 W
Package weight4.97 kg
CertificationLVD, BSMI FCC 15 A, CE EMC A, BSMI ENC RoHS A
ProducatorZYXEL
Garantie60

Battery

LAN-Port-TypeGigabit
Power over Ethernet (PoE)Yes
Rack mountingYes
VLAN supportYes
Quality of Service (QoS) supportYes
Web-based managementYes
System event logYes
Switch typeManaged
Firmware upgradeableYes
MAC address filteringYes
Access Control List (ACL)Yes
Internal memory256 MB
Switch layerL2
Flow control supportYes
Rate limitingYes
IGMP snoopingYes
Storage relative humidity (H-H)10 – 95%
Installed SFP modules quantity
Configuring Location Settings (CLI)Yes
Basic switching RJ-45 Ethernet ports quantity24
10G supportNo
Broadcast storm controlYes
Spanning tree protocolYes
Authentication typeIEEE 802.1x, RADIUS
Multicast supportYes
MAC address table16000 entries
Packet buffer memory1.5 MB
Flash memory32 MB
Combo SFP ports quantity4
Copper ethernet cabling technology10BASE-TX, 1000BASE-T
Virtual LAN featuresPort-based VLAN, Private VLAN, Protocol-based VLAN, Voice VLAN
Switching capacity56 Gbit/s
Forwarding rate42 Mpps
DHCP featuresDHCP client, DHCP relay, DHCP snooping, DHCPv6 client, DHCPv6 relay
Security algorithmsSNMP, SNMPv2, SNMPv3, SSH-2, SSL/TLS
AuthenticationGuest VLAN, MAC-based authentication
Mean time between failures (MTBF)693245 h
Power over Ethernet (PoE) ports quantity24
Total Power over Ethernet (PoE) budget375 W
Heat dissipation1580.535 BTU/h
Porturi RJ 4524-28
Viteza TransferGigabit
Porturi SFPN/A
Montare in RackDa
ManagementDa
PoENu
Product colourBlack
Cables includedAC
Harmonized System (HS) code85176990
Operating temperature (T-T)0 – 50 °C
Storage temperature (T-T)-40 – 70 °C
Weight3.8 kg
Depth270 mm
Package height107 mm
AC input voltage100 – 240 V
Operating relative humidity (H-H)10 – 95%
Package depth355 mm
Height44 mm
Width441 mm
Package width616 mm
Noise level49.8 dB
Power consumption (max)463.5 W
Package weight4.97 kg
CertificationLVD, BSMI FCC 15 A, CE EMC A, BSMI ENC RoHS A
ProducatorZYXEL
Garantie60

General

LAN-Port-TypeGigabit
Power over Ethernet (PoE)Yes
Rack mountingYes
VLAN supportYes
Quality of Service (QoS) supportYes
Web-based managementYes
System event logYes
Switch typeManaged
Firmware upgradeableYes
MAC address filteringYes
Access Control List (ACL)Yes
Internal memory256 MB
Switch layerL2
Flow control supportYes
Rate limitingYes
IGMP snoopingYes
Storage relative humidity (H-H)10 – 95%
Installed SFP modules quantity
Configuring Location Settings (CLI)Yes
Basic switching RJ-45 Ethernet ports quantity24
10G supportNo
Broadcast storm controlYes
Spanning tree protocolYes
Authentication typeIEEE 802.1x, RADIUS
Multicast supportYes
MAC address table16000 entries
Packet buffer memory1.5 MB
Flash memory32 MB
Combo SFP ports quantity4
Copper ethernet cabling technology10BASE-TX, 1000BASE-T
Virtual LAN featuresPort-based VLAN, Private VLAN, Protocol-based VLAN, Voice VLAN
Switching capacity56 Gbit/s
Forwarding rate42 Mpps
DHCP featuresDHCP client, DHCP relay, DHCP snooping, DHCPv6 client, DHCPv6 relay
Security algorithmsSNMP, SNMPv2, SNMPv3, SSH-2, SSL/TLS
AuthenticationGuest VLAN, MAC-based authentication
Mean time between failures (MTBF)693245 h
Power over Ethernet (PoE) ports quantity24
Total Power over Ethernet (PoE) budget375 W
Heat dissipation1580.535 BTU/h
Porturi RJ 4524-28
Viteza TransferGigabit
Porturi SFPN/A
Montare in RackDa
ManagementDa
PoENu
Product colourBlack
Cables includedAC
Harmonized System (HS) code85176990
Operating temperature (T-T)0 – 50 °C
Storage temperature (T-T)-40 – 70 °C
Weight3.8 kg
Depth270 mm
Package height107 mm
AC input voltage100 – 240 V
Operating relative humidity (H-H)10 – 95%
Package depth355 mm
Height44 mm
Width441 mm
Package width616 mm
Noise level49.8 dB
Power consumption (max)463.5 W
Package weight4.97 kg
CertificationLVD, BSMI FCC 15 A, CE EMC A, BSMI ENC RoHS A
ProducatorZYXEL
Garantie60

Customer Reviews

0 reviews
0
0
0
0
0

There are no reviews yet.

Be the first to review “ZYXEL GS2220-28HP 28-PORT GBE SWITCH”

Your email address will not be published. Required fields are marked *

1 2 3 4 5
1 2 3 4 5
1 2 3 4 5