• Transmission Control Protocol (TCP)/Internet Protocol (IP) for Wired and Wireless Networks
• The Open Systems Interconnections (OSI) Model
• IP Addressing
• Firewalls
TCP/IP for Wired and Wireless Networks[1]
TCP/IP is an open-standard communications protocol suite that is the standard for communicating on the Internet
• TCP and IP (two different protocols) contain all the fundamental mechanisms needed to support any and all types of networked communications
• TCP/IP was developed as part of the ARPAnet project in the 1960’s (the early development of the current Internet)
• TCP/IP became a unifying and reliable element that enabled interoperability across incompatible systems
• One of TCP/IP's most basic yet critical functions is its preparation of application data for transmission across a network.
• TCP/IP accepts data of virtually any size from applications (typically in the form of a file) and chops it up into smaller, more manageable chunks called segments (segmentation)
• In communicating, TCP handles flow control, IP handles addressing
• Being a suite of different protocols, TCP/IP includes such protocols as DNS, DHCP, http, ftp, POP3, SMTP and TELNET. Other TCP protocols may be found at http://www.protocols.com/pbook/tcpip1.htm
The Open Systems Interconnections (OSI) Model
The most common way to illustrate the communication process of segmentation and packetization is through the Open Systems Interconnections (OSI) Model
• The OSI model is a seven layer stack of processes that provide a standardized method of communicating between network devices
• The seven OSI model layers are the Application, Presentation, Session, Transport, Network, Data link and Physical layers
