Enterprise Networking Learning Center
Plain-language answers to the most common enterprise networking questions — from SD-WAN and PoE to VLANs and structured cabling.
Frequently Asked Questions
Networking Glossary
Service Set Identifier — the name of a WiFi network broadcast by an access point.
Power over Ethernet — delivers DC power through network cables to eliminate separate power adapters.
Virtual LAN — logical network segmentation at Layer 2 to isolate broadcast domains.
Multi-Protocol Label Switching — dedicated WAN circuit technology, largely replaced by SD-WAN.
Quality of Service — traffic prioritization to ensure latency-sensitive apps (VoIP, video) get bandwidth.
Border Gateway Protocol — the routing protocol of the internet; used at enterprise WAN edges.
Link Aggregation Control Protocol — bundles multiple physical links into one logical higher-bandwidth link.
Main/Intermediate Distribution Frame — the wiring closets housing core and access layer switches.
Small Form-factor Pluggable — modular 10GbE transceiver for fiber or DAC connections between switches.
Network Access Control — authenticates and authorizes devices before granting network access (e.g., Cisco ISE).
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