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Technical resources
Buying guides, technical notes and manufacturer-reference resources for professional optical links.
Editorial scope
SFP through QSFP-DD · original manufacturer references · selection boundaries · procurement context
Expert guide to the Juniper EX Series: EX2300, EX3400, EX4300, EX4400, EX4650, EX9200. Campus positioning, Virtual Chassis, Junos OS, Mist AI, part numbers, and pricing.
April 15, 2026
Expert guide to choosing a FortiGate: models from 40F to 7000, threat protection throughput sizing, UTP/ATP/Enterprise licenses, HA clustering, SD-WAN, and multi-tenant VDOMs. Part numbers and pricing.
April 15, 2026
Expert guide to data center ToR (Top-of-Rack) switches: Cisco Nexus 93180YC-FX, Juniper QFX5120-48Y, Aruba CX 8325. Density, buffers, oversubscription, and part numbers.
April 15, 2026
Expert guide to 25G/100G data center aggregation switches: Cisco Nexus 9336C-FX2, Juniper QFX5120-32C, and Aruba CX 8325. Spine-leaf architecture and oversubscription sizing.
April 15, 2026
Expert guide to 40G QSFP+ modules: SR4, LR4, ER4, and 4×10G breakout. When to use 40G versus migrating to 100G. Cisco/Juniper part numbers and prices.
April 15, 2026
Expert guide to branch routers for remote work and SD-WAN: FortiGate 40F/60F vs Cisco Meraki MX67 vs Catalyst 8200. Dual-WAN configuration, VPN, ZTNA, and pricing.
April 15, 2026
Enterprise core switch comparison: Cisco Catalyst 9500 vs Juniper EX4650 for campus distribution/core deployments. Performance, latency, licensing, and 5-year TCO.
April 15, 2026
Expert guide to Cisco Firepower / Secure Firewall: 1000 to 9300 series, FTD vs ASA, FMC/FDM/CDO, and Threat/URL/Malware licenses. Sizing and alternatives.
April 15, 2026
Comparative guide to enterprise vs consumer Wi-Fi 6 routers: why a Netgear Nighthawk is unsuitable for business use. FortiGate 60F + APs vs standalone enterprise APs.
April 15, 2026
Expert guide to PoE++ switches for Wi-Fi 6E and 4K cameras: 802.3bt Type 3/4 (60-90W), PoE budget, capacity planning, and Cisco Catalyst 9300X vs Aruba CX 6300 vs Juniper EX4400.
April 15, 2026
Expert guide to Cisco ASR service provider routers: ASR 1000 vs ASR 9000 vs NCS 5500. PE/edge/core performance, IOS-XR licensing, BGP peering capacity planning, and MPLS L3VPN.
April 15, 2026
Expert guide to 25G SFP28 modules: SR, LR, DAC, and AOC. The modern spine-leaf standard for servers. Cisco/Juniper/Mellanox part numbers, pricing, and breakout options.
April 15, 2026
