The blacklist represents itself a list or register of entities which are denied privileges, service, mobility, access and admission due to these or other reasons. This function blocks all connections from the subscribers who are in the list.
What is Google Talk, you ask? In short, this feature of Google is the year 2012’s answer to instant messaging services. It takes the idea associated of online text messaging, and has updated them to include a variety of other aspects, all with one goal in mind: to make the user’s life easier. Imagine a Talk outlet that allows you to chat and share whatever is on your mind, and also fuses together concepts made popular by VOIP and SIP technologies, and you have a good starting overview on the innovative technology Google Talk provides.