Dr. Mark Humphrys

School of Computing. Dublin City University.

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Online coding site: Ancient Brain

coders   JavaScript worlds


CA170      CA2106      CA686      CA686I

Online AI coding exercises

Project ideas


See book 6.2.1 and 6.5.2

Port - Logical (not physical) connection to computer (server).
One hardware link: Many ports.
One host (physical server) can run many services (listening processes) at different addresses.

IP address = Address of a host.
IP address + port = Address of a process (service) on a host.

List of ports.
1 to 65535 (16 bit no).

List of ports

Ports set aside for some "well-known" services:

Full list:

ancientbrain.com      w2mind.org      humphrysfamilytree.com

On the Internet since 1987.

Note: Links on this site to user-generated content like Wikipedia are highlighted in red as possibly unreliable. My view is that such links are highly useful but flawed.