Consider sending a packet from a source host to a destination host over a fixed route. List the delay components in the end-to-end delay. Which of these delays are constant and which are variable? Describe what is Web caching and how it 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? Why? Suppose you wanted to do a transaction from a remote client to a server as fast as possible. Would you use UDP or TCP? Why