Detail Description HP J4904AManufacturer: HPE
Type : Networking
Switch-Type : 48 Ports
Enclosure Type : External
Built-In Devices : Led Panel
Networking J4904APorts Qty : 48 X Ethernet 10base-T, Ethernet 100base-Tx, Ethernet 1000base-T
Data Transfer Rate : 1 GBPS
Data Link Protocol : Ethernet, Fast Ethernet, Gigabit Ethernet
Routing Protocol : Igmpv2, Igmp, Igmpv3
Remote Management Protocol : Snmp 1, Rmon 1, Rmon 3, Rmon 9, Snmp 3, Snmp 2c, Http
Connectivity Technology : Wired
Communication Mode : Half-Duplex, Full-Duplex
Switching Protocol : Ethernet
Status Indicators : Port Status, Link Activity, Port Transmission Speed, Port Duplex Mode, Power, Test Mode, Fail
Features : Flow Control, Full Duplex Capability, Auto-Sensing Per Device, Ip-Routing, Dhcp Support, Bootp Support, Arp Support, Cisco Fast Etherchannel, Vlan Support, Manageable
Compliant Standards : IEEE 802.3, IEEE 802.3u, IEEE 802.1d, IEEE 802.1q, IEEE 802.3ab, IEEE 802.1p, IEEE 802.3x, IEEE 802.3ad (Lacp), IEEE 802.1w, IEEE 802.1x
Expansion / Connectivity
Expansion Slots Total (Free) : 4 ( 4 ) X Mini-Gbic
Interfaces : 48 X Network - Ethernet 10base-T/100base-Tx/1000base-T - Rj-45
1 X Serial - Console - 9 Pin D-Sub (Db-9)
Dimension and WeightHeight: 1.7inch
Weight: 11 Lbs
About Refurbished Products
Networks play critical roles in supporting business operations, supporting communication, and supporting entertainment. Networking switches are a fundamental building block in networks and help to connect devices for the purpose of sharing resources.
A switch will either work at layer 2, the data link layer in the OSI model, or at layer 3 – the network layer that supports routing. The majority of networking switches use Ethernet ports while the other switches are based on fiber channel, InfiniBand, and asynchronous transfer mode (ATM).
Generally, a networking switch irrespective of type should help network admins and other IT professionals to:
- Configure settings for bandwidth and duplex.
- Configure port mirroring to allow traffic monitoring
- Enable MAC filtering as well as other access control features.
- Enable or disable specific ports
- Set up the quality of service levels for specific ports
- Set up SNMP monitoring of devices
Different Types of Switches
Networking switches vary widely depending on the number of devices it can support, network bandwidth/speed, and form factor. Switches for small offices will have anything between 4 and 8 ports and can fit on a desk. For larger office network implementation, switches may have 24 ports, 48 ports, 96 ports, and 128 ports and are rack-mountable between 1U and 4U. Switches vary depending on network speed and tasks to be supported such as 40/100 Gbps, 10 Gigabit (up to 10000 Mbps), gigabit Ethernet (up to 1000 Mbps), power over ethernet and fast Ethernet (10/100 Mbps).
The unmanaged switches offer fixed configuration on a plug and play basis. It is the most basic switch and there are a few choices in the market. These switches are affordable, but the basic features make them inappropriate for enterprise applications.
The number of features and level of functionality improves with managed switches, making them ideal for enterprise and business applications. These switches are built with the command-line interface for ease of configuration. Equally, they support SNMP agents that come in handy when troubleshooting network issues.
The security on managed switches is better and will protect different types of traffic. Other features include support for virtual LANs, IP routing, and quality of service settings. Managed switches are more expensive compared to all other types of switches.
Smart switches refer to switches that possess more features than those of unmanaged switches but do not have the full features of managed switches. Smart switches are more cost-effective than managed switches.
Some of the limitations of the smart switches are a lack of telnet access support, Web GUIs, and a lack of many features for VLANs. They are affordable compared to a fully managed switch and are suitable for a smaller computer network.
Modular switches allow the addition of expansion modules as the network expands. The expansion modules allow for more networked devices but are application-specific. They may include wireless access points, firewalls, or network analysis tools. The flexibility of a modular networking switch comes at a higher cost.
For all types of networks and various network sizes, Cisco has reliable switches for your needs. You can pick by LAN types, Campus LAN Switches Access - Catalyst 9400 Series Switches, Catalyst 9300 Series Switches, Catalyst 9200 Series Switches, Catalyst 3850 Series Switches, Catalyst 3650 Series Switches, Catalyst 2960-X/XR Series Switches, Catalyst 2960-L Series Switches. The Campus LAN Switches Compact- Catalyst 3560-CX Series Switches, Catalyst 2960-CX Series Switches, Catalyst 2960-C Series Switches. The Campus LAN Switches-Core and Distribution Catalyst 9500 Series, Catalyst 9600 Series, Catalyst 3850 Fiber Series, Catalyst 6500 Series, Catalyst 6800 Series, Catalyst 4500-X Series. However, for the Data Center, you can select the Nexus 9000 Series Switches, Nexus 5000 Series Switches, Nexus 3000 Series Switches, Nexus 2000 Series Fabric Extenders. Anyone could choose the Data Center Switches with IOS Software- Catalyst 6500 Series Switches, Catalyst 4900 Series Switches, and Service Provider Switches-Aggregation Catalyst 6500 Series Switches, and Catalyst 4500 Series Switches. There are several featured switches for industrial level Ethernet 1000 Switches Industrial Ethernet 2000 Switches, Industrial Ethernet 3000 Switches, Industrial Ethernet 4000 Switches, Industrial Ethernet 5000 Switches.
The HPE Data Center Switches Series provide high performance and secure connectivity for any connection and this series switch includes FlexFabric 5940 Switches, FlexFabric 5930 Switches, FlexFabric 5900 Switches, FlexFabric 5800 Switches, FlexFabric 5700 Switches. The Aruba Network switches have better performance and reliability. These switches are easily scalable, secure, and feature multi-gigabit ports for high-speed mobile connectivity which includes Instant On 1930 Switches, 2530 Series Switches, 2920 Series Switches, 2930F Series Switches, 3810 Series Switches, 2540 Series Switches, 2930M Series Switches, 5400R Series Switches, 8320 Series Switches, Switch v3 Modules, Switch v2 Modules, Switches Transceivers, Switch Accessories, Office Connect Switches, 2615 Switches, 2620 Switches, 2915 Switches. The ProCurve series include10500 Switches, FlexNetwork 5130 EI Switches, FlexNetwork 5130 HI Switches, FlexNetwork 5120 SI Switches, 5500 EI Switches, 5500 HI Switches, Procurve Switch Transceivers, 5510 HI Switches, 3800 Switches, 3500 and 3500 yl Switches, 1920 Switches, 1900 Switches, 1810 Switches, 1620 Switches, 1410 Switches, 55xx Modules, 35xx Switch Modules.
We have a big range of network switches, including products from Linksys, TP-Link, Dell, Juniper Networks, Netgear, Cisco, and HPE for both managed and unmanaged options.