The Internet is a global network that connects billions of computers using TCP/IP, while an intranet is a private network within an organization that also uses TCP/IP. Public relations utilizes various Internet and intranet tools for different functions like publicity, sponsorship, fundraising, sales promotion, marketing, brand management, communication, education, and event management. PR professionals use blogs, social networks, videos, photos, wikis, podcasts, webinars, RSS feeds, forums, games, newsrooms, alerts, search optimization, and email for engagement and monitoring.