Whether you realize it or not, you use network protocols typically on a daily basis. While you are reading this introduction, in some form or fashion, you used the HTTP protocol. Did you check your email today? If so you more than likely either used POP, SMTP, IMAP or all three. Use YouTube or Google lately? If so you used the Domain Name System protocol, or simply put, DNS. TCP/IP is a suite of protocols that includes all of the protocols mentioned above, and many more. As we continue to learn the “ins and outs” of networking, it’s so very important to understand what transmission control protocol, TCP, and Internet protocol, IP are , and how they work together to “interconnect” network devices. Scenario Joe has been studying his networking book diligently over the last couple weeks and has learned quite a bit. Even his brother John seems impressed (but would never admit it). “What do you think about TCP/IP?” John asks his younger brother. “Have you made it there yet or are you still on the OSI Model chapter?” Joe could sense a little sarcasm in his older brother’s voice. “I’ve learned a lot about TCP/IP, even learned how TCP is quite a bit different compared to IP.” “Oh yea, well what are some differences between the two?” Joe replies joyfully, “Well for one, TCP is connection-oriented, and IP is not. TCP operates at the Transport layer of the OSI model. IP operates at the Network layer of the OSI model.” John once again is impressed with his little brother’s progress. He replies, “That’s correct, but can you tell me the different fields in a TCP segment and a UDP datagram?” Joe replies, of course I can, but let me get back with you on those.” John chuckles as Joe takes his networking book with him back to his room. Draft a response to each of the questions below. After you have posted your own response, make sure you go back through the discussion and read the responses of your peers. Make sure you respond to at least two of your peers’ posts and take the opportunity to ask questions and share ideas. Your responses should again be detailed, thoughtful & substantial. Use your textbook and other academic resources to justify your responses. What is the TCP/IP suite? What makes it so relevant in regards to networking? What are some major differences between TCP and IP? What layers of the OSI model do they reside? What is UDP? How is it different than TCP? In your own words, what is ARP? DNS? DHCP?
