March 2017
Intermediate to advanced
262 pages
5h 26m
Chinese
Content preview from 物联网设备安全
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122
｜
第
5
章
号飞船所完成的人类首次登录月球的电视转播。大约
6
亿人观看了尼尔
·
阿姆斯特朗和巴
兹
·
奥尔德林在月球表面行走的画面，展示了人类技术的伟大胜利。美国及全世界都看到
了登月直播，向全社会展示了合作精神，让我们体验到了即使是我们最近的邻居月球，
和我们也相隔万里。对比这些，我们人类是多么的渺小，而登上月球又是一件多么了不
起的事情。虽然美国主导了登月任务，世人都看呆了，但最后功劳还是归功于全人类。
电视带给我们的直播报道永远改变了我们的生活，影响了我们的观点。
2001
年
9
月
11
日的恐怖袭击事件给全世界人都带来了恐惧，几乎在每一个观看了恐怖分子劫机撞向世
贸大楼，无辜受害者跳出窗户，大楼崩塌录像剪辑的人心灵上刻下了无法磨灭的伤疤。
无论从哪个角度来看电视积累下来的贡献，这个设备都不会很快消失。全世界数十亿家
庭拥有电视，观看定期播放的电视节目。最近，我们看到电视在屏幕尺寸和分辨率上有
了很大的改进，画面质量更加清晰逼真。高分辨率电视提供的分辨率可达每帧
2 073 600
个像素。超高分辨率的接班人
4K
和
8K
标准（
http://bit.ly/ultra-high-def_tv
）即将推出，
4K
标准提供
4
倍分辨率，据传
8K
标准可提供
7 680
×
4 320
（
3320
万）个像素。
当前市场上涌现的最新一波“智能”电视，关注的不仅仅是分辨率的改进。这些设备接
入到我们的
WiFi
网络中为我们提供服务，这在以前是根本想象不到的。这些电视包括
了观看视频流、视频会议、社交网络和即时信息等服务。在物联网领域，我们传统理解 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.