Switches, Hubs

Part Number	Description / PDF	Quantity
309FXE-N-ST-15 Red Lion	NETWORK SWITCH-ADVANCED 9 PORT	0
DVS-109W02-1GE Delta Electronics	MANAGED INDUSTRIAL 8 PORTS FE +	0
EKI-2701PSI-AE Quatech / B+B SmartWorx	NETWORK SWITCH-UNMANAGED 2 PORT	0
NT24K-14FX6-SC-POE Red Lion	NETWORK SWITCH-MANAGED 14 PORT	0
PD-9601G/AC Roving Networks / Microchip Technology	POH INJECTOR 95W 54-57V DESKTOP	530
EH7506-2SFP Atop Technologies	NETWORK SWITCH-MANAGED 6 PORT	1
PD-9601G/AC-US Roving Networks / Microchip Technology	POH INJECTOR 95W 54-57V DESKTOP	0
24031060020 HARTING	NETWORK SWITCH-UNMANAGED 6 PORT	2
IPOE-470-12V Business Systems Connection Inc.	IP30 INDUSTRIAL 4-PORT 10/100/10	22
NT24K-12FX4-SC Red Lion	NETWORK SWITCH-MANAGED 12 PORT	0
24035060020 HARTING	NETWORK SWITCH-UNMANAGED 6 PORT	2
1240940000 Weidmuller	NETWORK SWITCH-MANAGED 8 PORT	41
2832344 Phoenix Contact	NETWORK SWITCH-MANAGED 2 PORT	2
NGS8C2 Tripp Lite	NETWORK SWITCH-MANAGED 10 PORT	135
SL-5ES-2SC Red Lion	NETWORK SWITCH-UNMANAGED 5 PORT	0
EKI-7554MI-AE Quatech / B+B SmartWorx	NETWORK SWITCH-MANAGED 6 PORT	0
1085179 Phoenix Contact	ETHERNET SWITCH, FOUR RJ45 PORTS	512
NS-205PSE-24 ICP DAS USA Inc.	NS-205PSE WITH 24 VDC INPUT	30
EH7512-4G-4SFP Atop Technologies	NETWORK SWITCH-MANAGED 16 PORT	7
IGS-4215-8P2T2S Business Systems Connection Inc.	IP30 INDUSTRIAL L2/L4 8-PORT 10/	78

Switches, Hubs

1. Overview

Network switches and hubs are fundamental components in wired networking infrastructure. While both devices connect multiple Ethernet devices, switches operate at Layer 2 (Data Link) of the OSI model with intelligent MAC address learning capabilities, while hubs function as basic Layer 1 (Physical) broadcast devices. Switches enable efficient point-to-point communication, reducing collisions compared to hubs. Their role in modern network architecture is critical for enterprise connectivity, data center operations, and industrial IoT deployments.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Managed Switches	Support VLANs, QoS, SNMP monitoring, and port configuration	Enterprise core networks
Unmanaged Switches	Plug-and-play operation with fixed configurations	Small office/home networks
PoE Switches	Deliver power over Ethernet cables (IEEE 802.3af/at/bt)	IP camera systems
Core Switches	High-throughput backbone connectivity with redundant hardware	Data center aggregation
Access Switches	Edge network connectivity with basic security features	Corporate workstations
Active Hubs	Signal amplification with multi-port repeater functionality	Legacy industrial control systems
Passive Hubs	Simple physical layer connections without signal regeneration	Temporary network troubleshooting

3. Structure and Components

Typical switch architecture includes:

Modular/rackmount chassis with pluggable SFP/SFP+ ports
Application-Specific Integrated Circuits (ASICs) for packet processing
Content-Addressable Memory (CAM) for MAC address tables
Power over Ethernet (PoE) midspan/injector circuitry
Embedded firmware with CLI/Web GUI management interfaces

Hubs feature simpler construction:

Basic printed circuit board with Ethernet transceivers
Passive backplane connecting all ports
LED indicators for link/activity status

4. Key Technical Specifications

Parameter	Description	Importance
Port Density	Number of 10/100/1000 Mbps or 10/25/40/100 GbE ports	Determines scalability
Switching Capacity	Backplane bandwidth (bps)	Maximum data throughput potential
MAC Address Table Size	Number of supported device entries	Affects network scale and performance
Latency	Store-and-forward delay ( s)	Critical for real-time applications
PoE Budget	Total power delivery capacity (W)	Limits connected device count
Redundancy Protocols	STP/RSTP/MSTP support	Network fault tolerance

5. Application Domains

Enterprise networks (Fortune 500 offices with 10k+ devices)
Industrial control systems (Manufacturing plant floor switches)
Data centers (40/100 GbE spine-leaf architectures)
Smart buildings (PoE-enabled lighting and HVAC control)
Educational institutions (Campus network access layer)

6. Leading Manufacturers

Vendor	Flagship Products
Cisco Systems	Catalyst 9500 Series, Nexus 9000
Huawei	CloudEngine 8800, S5735 Series
HPE	Aruba 6200M, 5400R zl2
Juniper Networks	EX4600, QFX5100 Series
Ubiquiti	UniFi Switch Pro, EdgeSwitch

7. Selection Guidelines

Assess network scale (Small business vs. enterprise campus)
Determine management needs (CLI access vs. SNMP monitoring)
Calculate PoE requirements (Device wattage and total consumption)
Evaluate future expansion (Modular vs. fixed configuration)
Consider security features (802.1X authentication, ACLs)
Budget planning (Capex vs. Opex optimization)

8. Industry Trends

Key developments shaping the future of network switching include:

Software-Defined Networking (SDN) integration for centralized control
Multi-gigabit Ethernet adoption (2.5/5/10 GbE for Wi-Fi 6/7 backhaul)
AI-powered network analytics for predictive maintenance
Open networking platforms (White-box switches with disaggregated OS)
Energy-efficient designs (IEEE 802.3az compliant devices)
Convergence of wired/wireless management interfaces