Routers, switches, firewalls & adjacent infrastructure — an at-a-glance vendor directory.

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1) Enterprise Routing & Switching

• Arista Networks — Data-center–grade EOS switching; growing campus/edge portfolio.
• Cisco — Catalyst/Nexus/Meraki switching; ISR/ASR routing; end-to-end enterprise stack.
• Dell Technologies — Enterprise & open networking (OS10/SONiC) for campus and data center.
• Extreme Networks — Fabric-based campus/DC switching; analytics-driven management.
• HPE Aruba Networking — Aruba CX switching; campus core/aggregation; integrated wired/wireless.
• Juniper Networks — EX/QFX switching; MX/SRX routing & security; Mist cloud operations.
• Nokia Enterprise — Service-provider heritage applied to enterprise L3/L2 fabrics.
• ALE (Alcatel-Lucent Enterprise) — OmniSwitch campus & SMB switching.

2) Data Center Switching & High-Performance Fabrics

• Arista Networks — Leaf/spine at massive scale; low-latency DC fabrics.
• Cisco — Nexus DC switching; ACI policy fabrics; 400G/800G options.
• Juniper Networks — QFX DC fabrics; Apstra intent-based DC design/ops.
• HPE Aruba Networking — CX 8K/10K for DC spine/leaf; EVPN-VXLAN.
• Dell Technologies — Open networking with SONiC/OS10; broad merchant-silicon support.
• NVIDIA Networking — Spectrum Ethernet & InfiniBand (ex-Mellanox) for AI/HPC clusters.
• Edgecore Networks — OCP/white-box DC switches; NOS-agnostic (incl. SONiC).

3) Service-Provider/Core Routing (also used by very large enterprises)

• Cisco — ASR/NC series; segment routing; converged SDN.
• Juniper Networks — MX/PTX for edge & core; carrier-class features.
• Nokia — 7750 SR/7250 IXR; IP/optical integration at scale.
• Ciena — Packet networking (SAOS), IP/optical convergence.
• Huawei — SP routing/switching portfolio (availability restricted in some markets).

4) Next-Gen Firewalls & Security Appliances

• Palo Alto Networks — App-ID/Threat prevention; hardware NGFWs from branch to DC.
• Fortinet — FortiGate ASIC-accelerated firewalls; broad secure-fabric ecosystem.
• Check Point — Quantum appliances; long-standing NGFW/IPS.
• Cisco Secure Firewall — Firepower/ASA lineage; integrated with SecureX/Talos intel.
• Sophos — XGS appliances; synchronized security with endpoints.
• SonicWall — TZ/NSa/NSsp firewalls; SMB to mid-enterprise.
• WatchGuard — Firebox appliances; unified threat management for SMB/edge.
• Hillstone Networks — NGFWs & micro-segmentation (strong in APAC/EMEA).

5) SD-WAN & Secure Branch (appliance-centric)

• Cisco Meraki — Cloud-managed MX appliances (SD-WAN + security + cellular options).
• Cisco (Viptela/Catalyst SD-WAN) — ISR/ASR/Catalyst SD-WAN with advanced policies.
• Fortinet Secure SD-WAN — SD-WAN embedded in FortiGate hardware.
• Palo Alto Networks (Prisma SD-WAN) — CloudGenix lineage; appliances for app-aware routing.
• Juniper (Session Smart/Mist WAN) — SSR appliances; Mist-managed WAN.
• Versa Networks — Appliances & uCPE for integrated SD-WAN/SASE.
• Broadcom (VeloCloud) — Edge appliances via service provider channels.

6) Wireless LAN (APs & Controllers with matching switches)

• Cisco — Catalyst & Meraki APs; integrated switching & security.
• HPE Aruba Networking — Campus-first WLAN with AI-Ops.
• Juniper Mist — AI-driven WLAN with Marvis; tight EX/QFX integration.
• RUCKUS Networks (CommScope) — High-density WLAN; SmartZone/Cloud.
• Ubiquiti — UniFi APs & switches for SMB/MSP and simple campus builds.
• TP-Link Omada — Value WLAN & switching for SMB.

7) SMB / Prosumer Routing, Switching & Security

• Ubiquiti — UniFi/Enterprise lines; APs, switches, gateways, cameras.
• MikroTik — RouterOS on cost-effective routers/switches; flexible feature set.
• NETGEAR Business — Smart/Managed switches; SMB routing/security.
• Zyxel Networks — Firewalls, switches, APs for SMB/MSP.
• TP-Link (Omada) — Managed switches/routers/Wi-Fi at entry-level price.
• D-Link Business — SMB switches & security gateways.

8) Industrial & Ruggedized Networking (Utilities, OT, Transportation)

• Siemens (RUGGEDCOM) — Rugged switches/routers for harsh environments.
• Belden (Hirschmann) — Industrial Ethernet with TSN/time-critical support.
• Moxa — Industrial switches/routers/serial-to-IP; rail & energy sectors.
• Westermo — Mission-critical industrial routers/switches.
• Phoenix Contact — Industrial networking & cybersecurity appliances.

9) 5G/LTE Edge & Branch (Cellular Routers/Gateways)

• Cradlepoint (HPE) — 5G edge routers; branch/vehicle/IoT.
• Peplink — Multi-WAN/5G bonding; branch & mobile.
• Digi — Enterprise/industrial cellular routers.
• Sierra Wireless (Semtech) — AirLink cellular gateways.
• Teltonika Networks — Value 4G/5G routers for IoT/edge.

10) Optical Transport & Metro Ethernet (the “etc.” many networks depend on)

• Nokia — IP/optical end-to-end.
• Ciena — WaveLogic optical + packet networking.
• Infinera — Coherent optical transport platforms.
• ADVA (now part of Adtran) — Packet/optical access & synchronization.

11) Application Delivery & DDoS (adjacent network appliances)

• F5 — BIG-IP hardware ADCs; L4-L7 traffic management.
• NetScaler (Cloud Software Group) — ADC appliances (ex-Citrix ADC).
• A10 Networks — ADC & DDoS mitigation appliances.
• Progress Kemp LoadMaster — ADC appliances for SMB/mid-market.

12) Storage/FC Networking (when your network touches SAN)

• Broadcom Brocade — Fibre Channel directors/switches.
• Cisco MDS — SAN switching for enterprise DCs.

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Notes

• This list focuses on hardware-forward vendors commonly used by enterprises, MSPs, carriers, and industrial operators.
• Availability varies by region; some brands face market or regulatory restrictions in certain countries.