这种病毒是安装在目标设备的内存中的，一旦病毒在目标设备中安装完成，病毒会马上屏蔽设备的远程通信端口，并开始扫描网络中其它可攻击的目标。
Once installed in the router's memory, the bot blocks remote communication ports and begins to scan the network for other vulnerable machines.
然而，在有些情况下，将被测设备或连接电缆屏蔽起来是不实际的。
However, in some cases, shielding the device under test or the connecting cabling isn't practical.
高阻设备和信号源也必须是屏蔽的。
The high impedance devices and signal sources must also be shielded.
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