This is how instant messengers or file sharing programs work - the system keeps a list of users with their IP addresses.

这是IM和文件分享软件工作的原理– 系统总是保存着包含着IP地址信息的用户列表。

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To this point, IP surveillance offers clear advantages over analogue CCTV or DVR deployments with significant savings as a result of sharing existing network infrastructure, computation and storage.

在这一点上，IP监控比模拟CCTV或者DVR部署有明确的优势，它能分享现有的网络基础设施，而且大大节省了运算和存储成本。

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However this supposition does not come into existence in such problems as domain routing, IP Multicast, P2P file sharing etc.

对于域间路由、IP多播、P 2 P文件共享等问题，这个假设并不成立。

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Of course, many of the 12.6 million IP addresses found to be sharing files over the three month period may have downloaded multiple games.

FORBES: Finally, Some Objective Figures On Games Piracy

QNAP's new TS-x12 models are easy to attach to existing networks and provides easy file sharing within the network, centralized backup of all networked computers, website hosting, printer sharing, even recording of surveillance video from IP cameras.

ENGADGET: QNAP's new Turbo NAS line features iOS streaming via WiFi, 3G

And the first rumblings of a rights-management system for controlling the sharing of physical things are appearing: The IP-hoarding firm Intellectual Ventures received a patent in October for a 3-D printer feature that blocks the creation of verboten objects.

FORBES: Inside Thingiverse, The Radically Open Website Powering The 3D Printing Movement