How does the distinction between kernel mode and user mode function as a rudimentary form of protection?

内核模式和用户模式的区分作为一种基本的保护形式，可以防止用户程序对操作系统的核心部分进行非法访问和修改。在内核模式下，操作系统拥有完全的访问权限，可以执行任何操作，而在用户模式下，用户程序只能访问受限的资源和服务，不能直接访问操作系统的核心部分。这种区分可以有效地保护操作系统的稳定性和安全性。

相关问题

Notes on modulo positioning Modulo positioning (MC_MoveModulo) is possible irrespective of the axis type. If may be used both for linear or rotary axes, because TwinCAT makes no distinction between these types. A modulo axis has a consecutive absolute position in the range ±∞. The modulo position of the axis is simply a piece of additional information about the absolute axis position. Modulo positioning represents the required target position in a different way. Unlike absolute positioning, where the user specifies the target unambiguously, modulo positioning has some risks, because the required target position may be interpreted in different ways.翻译成中文

模数定位笔记

模数定位（MC_MoveModulo）可用于任何轴类型，无论是线性轴还是旋转轴，因为TwinCAT不区分这些类型。模数轴在±∞范围内具有连续的绝对位置。轴的模数位置只是关于绝对轴位置的额外信息。模数定位以一种不同的方式表示所需的目标位置。与绝对定位不同，用户在模数定位中指定目标时存在一些风险，因为所需的目标位置可能会被解释为不同的方式。

13. What is the difference between HTML elements and tags?

HTML (Hypertext Markup Language) is a markup language used to create web pages. The terms "HTML elements" and "tags" are often used interchangeably, but they do have a distinction.

An HTML element is everything between the start tag and the end tag, including the tags themselves, and any content within them. For example, the following is an HTML element:

<p>This is a paragraph</p>

The start tag is <p> and the end tag is </p>. "This is a paragraph" is the content of the element.

A tag, on the other hand, is the part of an HTML element that is enclosed in angle brackets. There are two types of tags: the start tag and the end tag. A start tag begins an HTML element and an end tag ends it. For example, in the element above, <p> is the start tag and </p> is the end tag.

In summary, an HTML element consists of tags and any content within them, while a tag is just the part of an HTML element enclosed in angle brackets.