Changes

*Direct optical connection via suppliers will have a terminator in the premises and can offer gigabit speeds or above.

*Direct optical connection via suppliers will have a terminator in the premises and can offer gigabit speeds or above.

*Cable connection links you to your cable company, which provides you with many (though not all) of the same services as a traditional ISP. The speed of transmission over a cable network can vary widely (from quite fast to very slow) based in part on the usage within your neighborhood.

*Cable connection links you to your cable company, which provides you with many (though not all) of the same services as a traditional ISP. The speed of transmission over a cable network can vary widely (from quite fast to very slow) based in part on the usage within your neighborhood.

*4G and soon 5G connection over the mobile network is an option in some rural situtations that are outside the reach of fast physical connections.

*4G and soon 5G connection over the mobile network is an option in some rural situations that are outside the reach of fast physical connections.

 

 

* Where all else fails, connection can be via dialup modems. With dialup connectivity, your server is not usually permanently connected to the Internet. Rather, it connects to your ISP over a phone line using a modem or ISDN adapter . Because your connection to the Internet is not permanent, some of the services on your server cannot be provided to the outside world. For example, having your server host your external company web site would create a problem because whenever your server was not connected to the Internet, the web site would not be available. (However, it could certainly host an intranet web site because the local network would always be connected.)

* Where all else fails, connection can be via dialup modems. With dialup connectivity, your server is not usually permanently connected to the Internet. Rather, it connects to your ISP over a phone line using a modem or ISDN adapter . Because your connection to the Internet is not permanent, some of the services on your server cannot be provided to the outside world. For example, having your server host your external company web site would create a problem because whenever your server was not connected to the Internet, the web site would not be available. (However, it could certainly host an intranet web site because the local network would always be connected.)

====IPv4 and IPv6 addressing====

====IPv4 and IPv6 addressing====

Everything in this manual to date refers to IP4 (Ip version 4) addressing. The world is running out of IP4 addresses and has been for some time. Various strategies have been adotpted by ISPs to obscure this issue adn much of the world is still running on IPv4.

Everything in this manual to date refers to IPv4 (IP version 4) addressing. The world is running out -- well, technically-speaking ''has'' run out -- of IPv4 addresses. Various strategies have been adopted by ISPs to obscure and work-round this issue and much of the world is still running on IPv4.

Nonetheless IP6/v6 addresses will have to be used at some future point. For now, all in this manual concerns in IP4 -- the system is however fully IP6 capable.

Nonetheless IPv6 addresses will have to be used at some future point, although few ISPs offer direct IP6 connectivity even in 2021. For now, all in this manual concerns IPv4 -- the underlying system is however fully IPv6 capable. Considerable extra work is called for, so as to integrate that support into the system, and this is not a priority for now; eventually of course it will be. If you wish to contribute to this work, please consider volunteering or offering code.