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Network glossary
What Is a Proxy? Forward, Reverse, and Transparent Proxies
What is a proxy? Forward, reverse, and transparent proxies, SWG, features, vendors, and SASE migration.
April 15, 2026
Technical resources
Original optics, documented by reference.
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
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Network glossary
What Is MACsec? Layer 2 Encryption Explained
What is MACsec? 802.1AE L2 AES-256-GCM, hop-by-hop, Cisco/Juniper/Aruba, vs IPsec.
April 15, 2026
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Network glossary
What Is a Load Balancer? Definition and How It Works
What is a load balancer? L4/L7, GSLB, algorithms, F5, HAProxy, NGINX, and cloud LB.
April 15, 2026
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Network glossary
What Is an NGFW? Next-Generation Firewall
What is an NGFW? L7 features, App-ID, IPS/AV/URL, SSL decryption, and leading vendors.
April 15, 2026
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Network glossary
What Is an IPS / IDS? Intrusion Detection and Prevention
What are IPS and IDS? Intrusion detection, signatures versus anomaly detection, NGFW, and Snort.
April 15, 2026
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Network glossary
What Is 802.1X? Network Authentication
What is 802.1X? Port-based authentication, EAP-TLS/PEAP, NAC, and Enterprise WiFi.
April 15, 2026
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Network glossary
What Is an SFP Module? Definition and Types
What is an SFP module? 1G-400G families, SR/LR/ER interfaces, DOM, and compatibility.
April 15, 2026
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Network glossary
What Is PoE? Power over Ethernet Explained
What is PoE? 802.3af/at/bt, Type 3/4, applications, cabling, and switch power budget.
April 15, 2026
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Network glossary
What Is NAT? Network Address Translation
What is NAT? Static/Dynamic/PAT, NAT64, use cases, drawbacks, and IPv6.
April 15, 2026
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Network glossary
What Is QoS? Network Quality of Service
What is QoS? DiffServ, DSCP, classification, LLQ, WiFi WMM, and voice/video prioritization.
April 15, 2026
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Network glossary
What Is OSPF? Open Shortest Path First
What is OSPF? Link-state IGP, areas, LSAs, BFD, and fast convergence.
April 15, 2026
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Network glossary
What Is BGP? Border Gateway Protocol
What is BGP? Internet routing protocol, AS, path attributes, multihoming, and best practices.
April 15, 2026