"Information security system design basis" Week 11 study summary (ch15, ch16)

"Information security system design basis" Week 11 study summary (ch15, ch16)

Learning content

Chapter XV
1, a computer network: a computer network to communicate and share resources connected together in various ways and a set of computer equipment. We use a network share of those intangible resources and physical resources.
2, the connection between the computer usually by wire or cable physically implemented. The network is not defined physical connection, but by definition communication capabilities.
3, computer network devices not only a computer, network device further comprises a variety of network information transmission process.
Chapter XVI
1, the World Wide Web infrastructure, information, and networking software for accessing information, Web pages that include or reference the various types of document data link is a connection between two web pages, Web sites, is a group of related web pages are usually designed and controlled by one person or company, Web browsers are software tools to obtain and display web pages, Web server is a computer web page in response to the request.
2, HTML5 is presented using the context menu drop-down menu of ideas, there is an additional attribute (asynchronous) may be included in a mark to show the reality of the content is loaded asynchronously through, it also includes several receiving input from a form the new tag.
3, XML (Extensible Markup Language): Allows the user to describe the language of the document content. Meta-language: the language used to define other languages. Document Type Definition: Statute of the XML document structure.
4, Extensible Stylesheet Language: language for defining XML document to convert between the other output formats. XML is a mark specification language, XML files are data.
5, the social network: allow people with common interests to communicate interactive online services, divided into internal and external users.

Textbook learning and problem solving process

problem:

   为什么会connection refused   

Resolution process: not yet resolved, and the subsequent problems virtual machine does not work properly.