Question

A. Skype offers a service that allows you to make a phone call from a PC to an ordinary phone. This means that the voice call must pass through both the Internet and through a telephone network. Discuss how this might be done.

B. Describe how Web caching can reduce the delay in receiving a requested object. Will Web caching reduce the delay for all objects requested by a user or for only some of the objects?

Answer 1

Answer: A. Voice over Internet Protocol

B. It reduces the delay for all objects requested by a user.

Step-by-step explanation:

Voice over Internet Protocol is used to transfer voice communication and multimedia over the internet. It converts voice into a digital signal, transfers it over the internet and then reconverts it to voice when it reaches its destination.

Web Caching stores the data from a web page for reuse at a later time, this helps to reduce the tasks the server carries out and reduces delay. Because some objects are cached, more resources can be focused on objects that are not thereby reducing delay for all objects requested by a user.