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How are ssl certificates verified?
...ted certificate authority.
The certificate contains the domain name and/or ip address of the web server. Your web browser confirms with the certificate authority that the address listed in the certificate is the one to which it has an open connection.
Your web browser generates a shared symmetric k...
iPhone App 开发第一步：从零到真机调试HelloWorld - 更多技术 - 清泛网 - ...
...点收集（Collect），直至你的iPhone在Orgnizer中的Device中可以显示，并且旁边是小绿色圆点（红点或黄点均表示配置仍不成功），说明你的iPhone 已经被XCode接受了。此时，回到XCode中，Scheme处已经可以选择你的iPhone，那么一切OK，选...
UDP vs TCP, how much faster is it? [closed]
...dges a set of packets, calculated by using the TCP window size and round-trip time (RTT).
For more information, I recommend the simple, but very comprehensible Skullbox explanation (TCP vs. UDP)
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2016电商“死亡”名单（上半年） - 资讯 - 清泛网 - 专注IT技能提升
...月，官方微博、微信停止更新，有公司员工的社交媒体圈显示“再见蜜淘”之类的话语。
模式：前身CN海淘上线于2014年3月，主打一站式海淘代购的轻模式；2014年7月，蜜淘宣布切入上游供应链，推出限时特卖服务，由轻模式的...
Cookies vs. sessions
...omes invalid. If it was all based on cookies, a user (or hacker) could manipulate their cookie data and then play requests to your site.
Edit: I don't think there is any advantage to using cookies, other than simplicity. Look at it this way... Does the user have any reason to know their ID#? Ty...
使用App Inventor扩展实现多点触控：Scale Detector · App Inventor 2 中文网
...的大小缩小 3，至少缩小到 5。程序还会设置标签文本以显示球的当前大小。
应用程序的另一个关键部分是在应用程序启动时调用 ScaleDetector.AddHandlerToCanvas 方法。 这告诉比例检测器在指示的画布上侦听比例手势。 请注意，此处...
Master-master vs master-slave database architecture?
... this is that it is very hard to preserve absolute consistency. See the wikipedia article for more.
Wikipedia seems to have a nice summary of the advantages and disadvantages
Advantages
If one master fails, other masters will continue to update the
database.
Masters can be located ...
403 Forbidden vs 401 Unauthorized HTTP responses
...as. I typically use this status code for resources that are locked down by IP address ranges or files in my webroot that I don't want direct access to (i.e. a script must serve them).
– Kyle
May 9 '13 at 13:20
...
Java 反射最佳实践 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...) {
e.printStackTrace();
}
}
/**
* 显示消息中心
*/
public static void openStatusBar(Context mContext) {
// 判断系统版本号
String methodName = (VERSION.SDK_INT <= 16) ? "expand" : "expandNotificationsPanel";
do...
无人驾驶汽车大难题 人工智能同人的差距显著 - 资讯 - 清泛网 - 专注C/C++...
...”上的差距。谷歌在之前向美国相关部门提供的一份报告显示，在过去的14个月测试中，其无人驾驶汽车总共“主动脱离无人驾驶状态”272次，除了“主动脱离无人驾驶状态之外”，还有69次驾驶员选择取消无人驾驶状态的情况...