DALnet began as a gamers Net, but has expanded. It offers intrusion protection and registered nicknames. KidsWorld is a Net for those under 18. Adults must register upon entering, and security personnel supervise vigorously. All of these Nets and more are pre-configured in major IRC software packages.
Channels can be public or private, and moderated or unmoderated.
The channel will cease to exist when the last participant leaves the channel. The op is the person who creates the channel. The op has the power to configure the channel as moderated, invitation only, or according to several other parameters. The op also has the power to bestow op status on other users. The op is responsible for maintaining order on the channel and establishing ground rules for participants to follow.