This section covers the different protocols used on a network. In this section you will learn about MAC addresses, the OSI model, and the common network protocols such as TCP/IP, FTP, SMTP, and TFTP, for example. This section also covers TCP/UDP port functionality, network services such as DHCP, DNS, WINS, and SNMP. IP Addressing is also covered in this part along with understanding public and private networks, WAN technologies, remote access, and security protocols.