The Importance of Training Hands-On LANs, WANs and Cisco Routers
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Course Description

Learn the skills necessary to survive and thrive in the Local/Wide Area and TCP/IP data network environment. We begin with a review of the OSI Model and its applicability to LAN and TCP/IP protocols, then learn about Ethernet and token ring LANs, their similarities, differences, benefits and drawbacks. Students build three LANs, configure the necessary hardware and software, connect cables to workstations and hubs and demonstrate that all work using LAN analyzers and connectivity tools such as PING.

Students then connect these LANs together using several Cisco routers and WAN links. In so doing, students learn how Cisco routers are organized and the commands that make them run. Students configure and install WAN and LAN router interfaces. Route tables are built first using separate and then subnetted static routes. To do so successfully, students must first devise a subnetting plan given typical real-life constraints. Success is demonstrated when all stations on all LANs can communicate with each other and Telnet into any router at will.

Students progress further into routing with a discussion of what routing is and how routes are chosen. Students reconfigure all routers to run TCP/IP with RIP routing protocol. Once operational, we discuss the efficient OSPF routing protocol and reconfigure the routers again to run variably-subnetted OSPF LANs and WANs.

Resolution - what it is, where and how it is used - forms the next class unit. Topics and labs include ARP, RARP, DNS concepts and host table configuration in both routers and workstations.

A practical discussion of the transport layer and the UDP and TCP protocols follows. Labs examine traffic flows and malfunctions using live traffic recorded on LAN analyzers. Each student will have their own workstation-based analyzer.

Students will also use a variety of time and labor-saving network software tools obtainable on the Internet at low cost. "Cheat sheets" help students remember and apply what they have learned on the job after the class is over.


Students who complete this class understand not only the concepts underlying LANs, WANs and TCP/IP networks, but how to apply them in the real world. Further, students can recognize, diagnose and correct a wide variety of LAN and TCP/IP malfunctions with respect to token ring, Ethernet, routing and bridging. Students can design, address and subnet TCP/IP networks because they will design and build several of them in class.

Upon completion of this class, students are able to:
· Explain how the OSI Model works in practical terms, and give concrete examples
· Use the OSI Model as a troubleshooting tool, and as a way to grasp new terms and technology
· Build an Ethernet or token ring LAN, and explain how each works
· Examine live LAN traffic using LAN analyzers at each station
· Define what routing is; develop addressing plans and perform addressing and subnetting
· Identify the functions needed in routing and the components that implement these functions
· Telnet into routers
· Configure Cisco routers to route between LANs via WANs
· Install static routes and discuss why/when static routing is used
· Explain how RIP works and its benefits and limitations
· Explain how OSPF works and its benefits and limitations
· Compare RIP to OSPF point for point
· Understand address resolution, what forms it can take, where it is used and why it is so important
· Characterize UDP and TCP and discuss their reliability
· Effectively use built-in Windows 2000, NT-based and/or W9x TCP/IP testing and monitoring tools
· Identify and explain the purpose of the other core protocols that are essential parts of the TCP/IP application set

Instructional Methods

Balanced presentation and discussion, self-quizzes, paper design labs and hands-on laboratory exercises.


Networking people involved in LANs and TCP/IP networks. These include systems and network analysts and designers, sales staff, troubleshooters, data communications managers and technicians, information managers and LAN/WAN specialists. Application programmers who need a working understanding of LANs and TCP/IP will find value in this class.


Six months' hands-on TCP/IP networking experience or completion of the Hands-On Introduction to TCP/IP class.


Five days
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