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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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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
What is MACsec? 802.1AE L2 AES-256-GCM, hop-by-hop, Cisco/Juniper/Aruba, vs IPsec.
April 15, 2026
What is a load balancer? L4/L7, GSLB, algorithms, F5, HAProxy, NGINX, and cloud LB.
April 15, 2026
What is an NGFW? L7 features, App-ID, IPS/AV/URL, SSL decryption, and leading vendors.
April 15, 2026
What are IPS and IDS? Intrusion detection, signatures versus anomaly detection, NGFW, and Snort.
April 15, 2026
What is 802.1X? Port-based authentication, EAP-TLS/PEAP, NAC, and Enterprise WiFi.
April 15, 2026
What is an SFP module? 1G-400G families, SR/LR/ER interfaces, DOM, and compatibility.
April 15, 2026
What is PoE? 802.3af/at/bt, Type 3/4, applications, cabling, and switch power budget.
April 15, 2026
What is NAT? Static/Dynamic/PAT, NAT64, use cases, drawbacks, and IPv6.
April 15, 2026
What is QoS? DiffServ, DSCP, classification, LLQ, WiFi WMM, and voice/video prioritization.
April 15, 2026
What is OSPF? Link-state IGP, areas, LSAs, BFD, and fast convergence.
April 15, 2026
What is BGP? Internet routing protocol, AS, path attributes, multihoming, and best practices.
April 15, 2026
What is ZTNA? Zero Trust, core principles, comparison with VPN, SDP/Agent, and vendors including Zscaler and Palo Alto.
April 15, 2026