Aussie living in the San Francisco Bay Area.
Coding since 1998.
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Joined 1 year ago
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Cake day: June 14th, 2023

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  • Well it isn’t shared before the upstream server, that’s what FTTH is.

    FTTH just means that there’s fiber going into your house.

    Most residential fiber internet connections use a technology called PON (GPON for gigabit or XGS-PON for 10Gbps). My understanding is that the fiber from your house goes into a splitter box in the street, which takes fiber connections from many customers (usually either 32 or 64 customers) and multiplexes them into a single fiber by either using different wavelengths of light or by time multiplexing. Upstream from this, bandwidth is shared.


  • The bandwidth is still shared… It’d be prohibitively expensive to have dedicated bandwidth just for your connection, and most customers don’t need anywhere near that. Unlimited, dedicated 1Gbps is around 320TB of data per month.

    A business-grade connection has fewer people sharing it, but it’s still shared. The only fully-dedicated connections are enterprise-grade connections (like in a data center), and even then it’s an upgrade that costs quite a bit. :)



  • The 2Gbps symmetric though Comcast is still cable. In theory, DOCSIS 4.0 supports up to 10Gbps down and 6Gbps up over cable, although real-world speeds are always lower than theoretical speeds.

    You share bandwidth with your neighbours regardless of whether it’s coax or fiber. A common contention ratio for residential connections is between 40:1 and 50:1, meaning the bandwidth is shared between 40 and 50 people (i.e. 1Gbps of upstream bandwidth per 40-50 people with a 1Gbps connection). This is usually fine as it’s very unlikely that every customer will be using the full bandwidth at the same time. Residential usage is usually very spiky with only brief periods of high speed usage.