ETH接口是什么

ETH接口指的是接口，是目前应用最广泛的局域网通讯方式，同时也是一种协议。而以太网接口就是网络数据连接的端口。

The ETH interface refers to the interface, which is the most widely used local area network (LAN) mode of communication, as well as an agreement. the Ethernet interface is the port of the network data connection.

以太网的每个版本都有电缆的最大长度限制（即无须放大的长度），这个范围内的信号可以正常传播，超过这个范围信号将无法传播。

Each version of the Ethernet has a maximum length limit on the cable (i.e. a length that does not need to be magnified) and signals in this range can be transmitted normally and beyond this range will not.

为了允许建设更大的网络，可以用中继器把多条电缆连接起来。中继器是一个物理层设备，它能接收、放大并在两个方向上重发信号。

In order to allow a larger network to be built, multiple cables can be connected by repeater. The repeater is a that receives, magnifies and re-twee signals in two directions.

扩展资料

extension

几种常见的以太网接口类型。

Several common Ethernet interface types.

1、SC光纤接口

1. SC fibre-optic interface

SC光纤接口在100Base-TX以太网时代就已经得到了应用，因此当时称为100Base-FX（F是光纤单词fiber的缩写），不过当时由于性能并不比双绞线突出但是成本却较高，因此没有得到普及，现在业界大力推广千兆网络，SC光纤接口则重新受到重视。

The SC fibre-optic interface had been applied in the 100Base-TX era, and was therefore known as the 100Base-FX (F is the acronym of the fibre-optic word fiber), although at that time, because of the fact that performance was not comparable to that of , which was prominent but costly and therefore not widely available, the SC fibre-optic interface was re-emphasized as a result of the industry's vigorous promotion of the Giganet.

2、RJ-45接口

2. RJ-45 interface

这种接口就是我们现在最常见的网络设备接口，俗称“水晶头”，专业术语为RJ-45连接器，属于双绞线以太网接口类型。RJ-45插头只能沿固定方向插入，设有一个塑料弹片与RJ-45插槽卡住以防止脱落。

This interface is the most common network device interface we have now, commonly known as “ crystalhead, with the professional term RJ-45 connector, which belongs to the type of double-string-to-tare interface. RJ-45 plugs can only be inserted in a fixed direction, with a plastic bullet stuck with RJ-45 slot to prevent escape.

3、FDDI接口

3. FDDI interface

FDDI是目前成熟的LAN技术中传输速率最高的一种，具有定时令牌协议的特性，支持多种拓扑结构，传输媒体为光纤。光纤分布式数据接口（FDDI）是由美国国家标准化组织（ANSI）制定的在光缆上发送数字信号的一组协议。

FDDI is one of the highest transmission rates in the currently mature LAN technology and has the characteristics of a time-fixing protocol, supporting various types of , which transmits fibre optic distribution data interfaces (FDDI) set up by the National Organization for Standardization (ANSI) of the United States of America to send on fibre-optic cables .

参考资料来源：百度百科-以太网接口

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