局域网的中英翻译，帮帮忙
A symmetric switch provides switched connections between ports with the same bandwidth, such as all 10BaseT or all 100BaseT. Symmetric switching is optimized for a reasonably distributed traffic load, such as in a peer-to-peer desktop environment.
A network manager must evaluate the needed amount of bandwidth for connections between devices to accommodate the data flow of network-based applications when deciding to select an asymmetric or symmetric switch.
LAN Switch and the OSI Model
LAN switches can be categorized according to the OSI layer at which they filter and forward, or switch, frames. These categories are: Layer 2, Layer 2 with Layer 3 features, or multilayer.
A Layer 2 LAN switch is operationally similar to a multiport bridge but has a much higher capacity and supports many new features, such as full-duplex operation. A Layer 2 LAN switch performs switching and filtering based on the OSI data link layer (Layer 2) MAC address. As with bridges, it is completely transparent to network protocols and user applications.
参考答案:切换开关提供对称连接港口与同一带宽,如全部或全部10baset100baset. 对称开关是一个合理配置,优化交通负荷,例如在同龄桌面环境. 经理人必须评估所需的网络带宽量容纳连接器的数据流的网络化,应用在决定选择一个对称或不对称开关. 局域网交换机和局域网交换机OSI模型可以按他们的互连层过滤和前沿, 或开关、框. 这些类别分别是:2层,2层与3层的特点,或多层. 局域网交换机是一种第二层的业务相近,但有更高多端大桥容量并支持了许多新的特点, 如全双工操作. 一、二层兰切换开关进行过滤基于OSI数据链路层(2层)MAC地址. 如桥梁,是完全透明的协议和用户对网络应用.