Which of the following technologies is primarily used by Skype to facilitate video calling over the internet?

Correct option is A

Skype uses Voice over Internet Protocol (VoIP) technology to facilitate video and audio calls over the internet. VoIP allows the transmission of voice and video data in real time.
Important Key Points:
1. VoIP: VoIP is a technology that enables voice and video communication through internet protocols. Skype is one of the earliest and most popular platforms using VoIP for video conferencing and voice calling.
2. Skype's Use of VoIP: Skype was among the first major applications to use P2P (Peer-to-Peer) networking combined with VoIP to provide seamless, high-quality video calls.
Knowledge Booster:
· Peer-to-Peer (P2P) Networking: Skype initially used a P2P network model to connect users directly, but this technology alone is not responsible for video calling—it works alongside VoIP.
· HTTP (Hypertext Transfer Protocol): This protocol is used for web browsing, not for real-time communication like video calling.
· ATM (Asynchronous Transfer Mode): This is a networking technology used to manage data traffic, not specifically for video calling.
· FTP (File Transfer Protocol): FTP is used for transferring files over the internet and does not provide video calling capabilities.