Consider the Telnet case study in Section 3.5.2. Assume a Telnet session is already active between Host A and Server S. The user at Host A then types the word Hello. a. How many TCP segments will be created at the transport layer of Host A? b. Is there any guarantee that each segment will be sent into the TCP connec- tion as soon as it is created? c. Does TCP provide any mechanism that can be useful for an interactive Telnet session? d. Would UDP offer a viable alternative to TCP for Telnet sessions over a reliable channel?