This course focuses on the primary aspects of data communications, including a study of the Open Systems Interconnection (OSI) and Internet models. Students will start at Layer 1 with the study of various Layer 1 interface and cabling configurations. Layer 2 involves Ethernet-switching components, including detailed configuration covering all aspects of switches using the command-line interface method. Moving up the OSI layers, students will learn security protocols and do static routing, EIGRP and OSPF configurations. Concentration on layers 4 through 7 include studying TCP, UDP, data reliability, and error correction methods, on the ladder to the FTP, HTTP, SMTP, DNS, and TFTP protocols of Layer 7.