MTU:Maximum Transmission Unit.PPP（Point-to-Point Protocol点到点协议,是为在同等单元之间传输数据包这样的简单链路设计的链路层协议。这种链路提供全双工操作，并按照顺序传递数据包。设计目的主要是用来通过拨号或专线方式建立点对点连接发送数据，使其成为各种主机、网桥和路由器之间简单连接的一种共通的解决方案。
DHCP Client:Dhcp进程名是Svchost.exe
PCMCIA-----“PERSONAL COMPUTER MEMORY CARD INTERNATIONAL ASSOCIATION standard for eg:JEIDA 4.1 orPCMCIA 2.0 (PC Card).
Hotplug:Starting with kernel 2.4 (in January 2001), hotplugging became a standard feature of GNU/Linux. It's been backported to kernel 2.2 (for USB), and kernel 2.6 makes it available to all sysfs-adapted busses and driver classes.Hotplug lets you plug in new devices and use them immediately. That means that users won't need to learn so much system administration; systems will at least partially autoconfigure themselves. Initially, hotplug included support for USB and PCI (Cardbus) devices, and could automatically configure some common network interfaces. Updated versions include IEEE 1394 (Firewire/i.Link) support and can download firmware to USB devices that need it. On mainframes, S/390 channel devices uses hotplugging to report device attach and other state change events. For laptops, newer kernels also include support for reporting docking station activity.
DSL:Digital Subscriber Line，缩写：DSL），是通过铜线或者本地电话网提供数字连接的一种技术。它的历史要追溯到1988年，贝尔实验室一位工程师设计
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