1- (10 points) Explain the correlation between OSI and TCP/IP model. Then provide example protocols for Applications and Transport layers in TCP/IP model.2- (5 points) Explain the difference between TCP and UDP Transport protocols.3- (4 points) Answer the following questions based on the format of a TCP packet:a. How many bits are reserved for control information?b. How many bits is reserved for source address?c. How many bits is reserved for destination address?d. How many bits is reserved for payload?