2. Do some research using your textbook or Internet to explain the following terms and or concepts. a. Describe major functions of Network Layer and Transport Layer of OSI or Internet Model. b. Explain the main protocols and their functions of the Network and Transport Layers. C. In wireless local area and personal communication networks, define the 1st, 2nd, 3rd, and the 4th generations of wireless technology (name, speed, Frequencies and transmission technologies used?).