DATA COMMUNICATION AND TELECOMMUNICATION MOHD IKRAMHAFIZ ABDUL HAMID A AMIR WALIYUDDIN RUSLAN A108446

TYPE OF RFCs STANDARD, DRAFT STANDARD, PROPOSED STANDARD These are standards-track documents, official specifications of the Internet protocol suite defined by the Internet Engineering Task Force (IETF) and its steering group the IESG. Internet Engineering Task Force (IETF)Internet Engineering Task Force (IETF) BEST CURRENT PRACTICE These are official guidelines and recommendations, but not standards, from the IETF. INFORMATIONAL, EXPERIMENTAL These non-standards documents may originate in the IETF or may be independent submissions. HISTORIC These are former standards that have been actively deprecated.

DIFFERENCES BETWEEN LAYERS IN OSI MODEL Application –Application using network –Common such as remote login, file transfer, and web page browsing –Sent message Presentation –A series of MISC function necessary for presenting data package to sender / receiver –Encrypted message Session –Responsible for establishing session between user –Encrypted message with synchronization point Transport layer –Provide end-to-end error-free network connection –Make sure data arrive exactly as it left source –Encrypted message with synchronization point with transport info

DIFFERENCES BETWEEN LAYERS IN OSI MODEL Network –Responsible for creating, maintaining and ending network connection –Transfer data packet from node to node within network –Encrypted message with synchronization point with transport info with network address Data link –Responsible for taking data and transforming it into a frame with header, control, and address information and error detection code –Encrypted message with synchronization point with transport info with network address with error-checking data Physical layer –Handle transmission of bits over a communication channel –Voltage levels connecters, media choice, modulation techniques