Summary Box: Glitch forces extension for suffixes

THE PROBLEM: A glitch forced the abrupt shutdown of a system for letting companies and organizations propose new Internet domain name suffixes. The application deadline had been Thursday and has been extended to next Friday.

DATA BREACH: The Internet Corporation for Assigned Names and Numbers, which is in charge of domain names, said some private data may have been exposed. They involved file names and user names. Few other details were available.

ABOUT THE SUFFIXES: Up to 1,000 suffixes could be added each year in the most sweeping change to the domain name system since its creation in the 1980s.