Answer: B webcast
Explanation:
A webcast is a technology that allows the live broadcast of an audio or video event on the Internet. It is also known as Web lecture, virtual meeting, etc. The major advantage is that it gives room for an event to have a larger reach. Webcast participation can be through PC, smart phones, tablets and other devices with quality Internet access.
"force per unit area" because pressure is force per unit area.
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A useful advantage of Asymmetric encryption over symmetric
encryption is that there is no secret channel necessary for the
exchange of the public key, unlike in the symmetric encryption which requires a
secret channel to send the secret key.
Another
advantage of Asymmetric encryption is that is has increased security. Asymmetric
uses two different keys (Public and private) for both encryption and decryption
of data while symmetric uses one.
