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所在平台: Udemy |
课程主页: https://www.udemy.com/course/ccnp-switch-arash-deljoo/
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课程名称：最完整的CCNP Switch培训课程 课程概述： 本课程旨在全面介绍网络交换机的工作原理、功能和在网络中的应用。交换机是一种用于连接网络设备（如计算机）的硬件，通过数据包交换技术将数据传输到目标设备。 核心要点： * **交换机的功能：** 交换机本质上是一个多端口的网络桥接器，它在OSI模型的**数据链路层（第二层）** 使用**MAC地址**来转发数据。 * **分层交换：** 一些高级交换机还具备**网络层（第三层）** 的路由功能，这类交换机通常被称为**三层交换机**或**多层交换机**。 * **数据流管理：** 交换机能够识别连接在其上的每个设备的**网络地址**，从而精确地将数据包仅发送给预期的目标设备，优化网络的安全性和效率。 * **冲突域和广播域：** 以太网交换机在数据链路层运营，为每个端口创建一个独立的**冲突域**，允许不同端口的设备同时通信而不会相互干扰。然而，广播数据仍然会被交换机转发给所有连接的设备，因此新形成的**网络段仍然是一个广播域**。 * **多层交换能力：** 交换机也可以在OSI模型的高层（包括网络层及以上）进行操作，具备这些能力的交换机即为多层交换机。 总而言之，本课程将深入讲解网络交换机的各个方面，帮助学习者掌握如何在实际网络环境中配置、管理和优化交换机设备。
A network switch is networking hardware that connects devices on a computer network by using packet switching to receive and forward data to the destination device.A network switch is a multiport network bridge that uses MAC addresses to forward data at the data link layer (layer 2) of the OSI model. Some switches can also forward data at the network layer (layer 3) by additionally incorporating routing functionality. Such switches are commonly known as layer-3 switches or multilayer switches.A switch is a device in a computer network that connects other devices together. Multiple data cables are plugged into a switch to enable communication between different networked devices. Switches manage the flow of data across a network by transmitting a received network packet only to the one or more devices for which the packet is intended. Each networked device connected to a switch can be identified by its network address, allowing the switch to direct the flow of traffic maximizing the security and efficiency of the network.An Ethernet switch operates at the data link layer (layer 2) of the OSI model to create a separate collision domain for each switch port. Each device connected to a switch port can transfer data to any of the other ports at any time and the transmissions will not interfere. Because broadcasts are still being forwarded to all connected devices by the switch, the newly formed network segment continues to be a broadcast domain. Switches may also operate at higher layers of the OSI model, including the network layer and above. A switch that also operates at these higher layers is known as a multilayer switch.
