Are you preparing to take either the Cisco or CompTIA certification exams? Then this blog post is perfect for you! Here, you’ll find an in-depth study guide featuring Cisco and CompTIA practice questions, covering topics such as Etherchannels, the OSI Model, and more. With this post, you’ll gain all the knowledge and resources necessary to ace your certification exams!
The OSI Model
The Open System Interconnection (OSI) Model is a framework of protocols and standards used in modern networking systems. It is a hierarchical model that divides communication between two systems into seven layers, each layer having its own unique function. The OSI Model helps to ensure proper communication between two systems by describing the steps needed for the communication to take place. This includes formatting data, addressing, routing, error detection and handling, and flow control. By understanding the OSI Model and its various layers, IT professionals can better troubleshoot network issues and create effective solutions.
In order to understand the OSI Model and how it works, it is important to first know the seven layers of the model. These layers are the Application Layer, Presentation Layer, Session Layer, Transport Layer, Network Layer, Data Link Layer, and Physical Layer. Each layer is responsible for different tasks when communicating between two systems. Knowing these different layers and their functions will enable IT professionals to better design, manage, and troubleshoot complex network systems. Additionally, understanding the OSI Model is an important part of most certification exams such as Cisco CCNA and CompTIA A+.
Virtual Local Area Networks (VLANs) provide organizations with a way to segment their networks and control broadcast traffic, reducing the chances of data being stolen or compromised. VLANs are also used to create virtual networks within a physical network, allowing organizations to create more secure and efficient networks. They also provide flexibility in creating multiple networks for different departments or projects within an organization. By using VLANs, organizations can reduce their hardware and software costs, as well as reduce management time required for network maintenance.