IT 212 Milestone Three IT-212-X2249 Intro to Computer Networks 23EW2 1
This advertising firm has offices in Albany, New York, and Springfield, Massachusetts. The company decided to expand in Fayetteville, North Carolina because there were more chances to enter new markets. This office will be home to 50 employees, including the new executive vice president of sales and marketing. I've been tasked to research the new Fayetteville, NC office setup project and deliver a report to the team with key considerations and recommendations for the network infrastructure setup. Since there are many ways of troubleshooting a network, diagnosing any problems will be easier if you understand how the network works. Troubleshooting requires technician to begin with the obvious, or at the bottom and work way up. The Open Systems Interconnection (OSI) Model is a reference model for how applications communicate over a network without regard to its underlying internal structure and technology. OSI model explains the complex process of sending data on a network ("TestOut LabSim," n.d.). OSI model has seven layers that can help the technician to troubleshoot and understand the network. First, there is the Physical Layer or Layer 1. This OSI model layer sets standards for sending and receiving electrical signals between devices ("TestOut LabSim," n.d.). For example, a user called to report being unable to use the internet. The technician should inquire as to whether they are wired or wireless, and if wired, the technician should verify whether the wired end is connected to an ethernet port of the machine and the other end is connected to the unmanaged switch, port wall, or VoIP. If all ends are connected, the technician should check if the ethernet port has both LED connections. If the machine is connected through wireless, the technician should verify if the Wi-Fi button is turned on or the Wi-Fi driver is not disabled cause this way the technician can verify that the Layer 1 or the Physical Layer has no issue. The second layer of the OSI model is the Data Link Layer or Layer 2. The Data Link or Layer2 defines the rules and procedures for hosts as they access the 2
Physical Later ("TestOut LabSim," n.d.). On this layer, a technician checks the technologies used to connect two machines across the network like Switchesm bridges and NICS, and WAPs function in Layer 2. On this layer, a technician can check on how devices control the rate of data transmission between hosts (flow control) ("TestOut LabSim," n.d.). The third layer is the Network Layer or Layer 3. The Network layer describes how data is routed across networks and onto the destination ("TestOut LabSim," n.d.). On this layer, a technician can check if the machines are getting the correct IP address, sending it to the correct IP address, or if it is in the correct subnet. The fourth layer is the Transport Layer or Layer 4. The Transport Layer provides a transition between the upper and lower layers of the OSI model. This