Because there is little to differentiate the technology of search service companies and the fact they depend on an advertising business that is unproved analysts have been expressing their concern regarding these issues. Companies and individuals are finding they can't even trust an e-mail message that is not verified by the message creator using a digital signature. There are just too many people with too much technology and too much time on their hands with too many axes to grind. While the incident did not cause any major harm to anyone's server or network, it was an inconvenience by adding to administrators workload. Yes, the lectures are optional.
Graduation is also optional.
Another key for PointCast is support for 23 different firewalls, ranging from Digital Equipment Corp.'s Firewall for UNIX to Trusted Information System's Gauntlet Internet. PCN claims security risks are minimal for users because the application downloads content, as opposed to executable programs. Animation and stock ticker code comes as part of the PCN client. Work has also been done to support firewall authentication types, meaning that PCN can support authentication parameters if network managers require user names and passwords from their corporate users. Content for the PCN broadcast service will be piped in from various major media sources, including Reuters , SportsTicker , AccuWeather and the Los Angeles Times , Boston Globe and Interactive Age Digital's parent CMP Publications Inc. to provide feeds to the news service.