For technically-minded readers who want to understand the whole stack from the office floor out to the submarine cable. Starts with LAN vs WAN, layers on the modern wireless stack (Wi-Fi 6/7, 5G, LoRa), and finishes with the global plumbing — submarine cables, IXPs, peering, and BGP — that makes the internet actually work, with Singapore as the case study.
Sets up the local-vs-wide distinction, the technologies in each (Ethernet, Wi-Fi, MPLS, SD-WAN), and the four network metrics (bandwidth, latency, jitter, loss) that recur throughout the path.
How wireless fits into the stack — Wi-Fi 6/7 for indoors, public and private 5G for mobility and campus, LoRaWAN and NB-IoT for low-power wide-area IoT.
The end-to-end picture. How a packet from your office actually reaches a server overseas — submarine cables, landing stations, data centre cross-connects, IXPs, peering, transit, and the BGP routing that holds it all together.
Continue into voice with the Voice Modernisation path, or browse all Knowledge Base articles.
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