p0973LQ  以太网传交换机  进行无冲突地传输数据

型号：p0973LQ

p0973LQ以太网交换机是基于以太网传输数据的交换机，它采用共享总线型传输媒体方式的局域网。以太网交换机的每个端口都直接与主机相连，并且一般都工作在全双工方式。交换机能同时连通许多对端口，使每一对相互通信的主机都能像独占通信媒体那样，进行无冲突地传输数据。

以太网交换机工作于OSI网络参考模型的第二层（即数据链路层），是一种基于MAC地址识别、完成以太网数据帧转发的网络设备。交换机的工作原理可以概括为“学习、记忆、接收、查表、转发”等几个方面。首先，它通过“学习”可以了解到每个端口上所连接设备的MAC地址，并将MAC地址与端口编号的对应关系“记忆”在内存中，生成MAC地址表。然后，当从一个端口“接收”到数据帧后，在MAC地址表中“查找”与帧头中目的MAC地址相对应的端口编号，最后，将数据帧从查到的端口上“转发”出去。

以太网交换机的主要功能包括端口扩展、传输距离扩展等。此外，它还可以分割冲突域，每个端口独立成一个冲突域，有效减少数据冲突。当端口有大量数据发送时，它也会先将收到的等待发送的数据存储到寄存器中，再依次发送，避免数据冲突。

p0973LQ以太网交换机按照不同的标准可以有多种分类，例如按照可管理性可以划分为非网管交换机和网管交换机；按照OSI七层网络模型划分，可以分为二层交换机和三层交换机等。

总的来说，p0973LQ以太网交换机在现代网络通信中发挥着重要作用，能有效提升网络性能和数据传输效率。

Model: p0973LQ

p0973LQ Ethernet switch is a data transfer switch based on Ethernet, which adopts the shared bus transmission media mode of local area network. Each port on an Ethernet switch is directly connected to a host and generally works in full-duplex mode. The switch can communicate with many pairs of ports at the same time, so that each pair of hosts communicating with each other can transmit data without conflict as if they were exclusive communication media.

Ethernet switch works at the second layer (data link layer) of OSI network reference model. It is a network device based on MAC address identification and Ethernet data frame forwarding. The working principle of the switch can be summarized as "learning, memory, receiving, table lookup, forwarding" and other aspects. First of all, it can learn the MAC address of the connected device on each port through "learning", and the corresponding relationship between the MAC address and the port number is "memorized" in memory, and the MAC address table is generated. Then, when the data frame is "received" from a port, the port number corresponding to the destination MAC address in the frame header is "found" in the MAC address table, and finally, the data frame is "forwarded" from the found port.

The main functions of an Ethernet switch include port expansion and transmission distance expansion. In addition, it can also split the conflict domain, each port is independent into a conflict domain, effectively reducing data conflicts. When the port has a large number of data to send, it will first receive the data to be sent to the register, and then send in order to avoid data conflicts.

p0973LQ Ethernet switches can be classified into unmanaged switches and managed switches based on different standards. According to the OSI seven-layer network model, it can be divided into Layer 2 switches and Layer 3 switches.

In general, the p0973LQ Ethernet switch plays an important role in modern network communication, which can effectively improve network performance and data transmission efficiency.