/**This blog by the history of ZJF collation and release, reproduced please indicate the source:http://blog.csdn.net/zjf280441589/article/category/1854365*/The application layer in TCP/IP
Introduction to DNSDomain Name System is the implementation of distributed computer system based on descriptive name-address mapping , and its function is to provide the mapping relationship between host name and IP addre
1 Principles of Network applications
1.1 Application Architectures
Client-server
Peer-to-peer
Hybird of C/s and peer
--skype
Client-server:find the address of the remote client
Client-client:direct communication
--instant messaging
similar with Skype
1.2
(MFC Application series) simple operations on the path layer in the device description table (Lesson 3 ).
There is also a path layer in the device description table. The path layer is to define the line in the customer area, and the line is within their respective territory. In MFC, you can use the CDC inpath of the CD
the content. The Usemap property of is used. Reference http://www.w3school.com.cn/tags/att_img_usemap.aspExample: usemap="#planetmap" />Name= "planetmap" > Where the Shape property can be polygon, making the shape a polygon. After the coords coords= "X1,y1,x2,y2,x3,y3,...": Each pair of "x, y" coordinates define a vertex of the polygon ("0,0" is the coordinate of the upper-left corner of the image).Defining a triangle requires at least three sets of coordinates, while high-latitude polygons r
underlying implementation method Redis is written in C language. Redis supports 5 types of data, stored in k-v form, K is of type string, and V supports 5 different data types, respectively: string,list,hash,set,sorted set, each of which has its own specific application scenario. From the internal implementation point of view is how to better implement these data types. Redis the underlying data structures are of the following types: Simple dynamic s
Android Frameworks layer provides hardware services, Android system app can call these hardware services, so as to complete the hardware control, to achieve the desired function. Next, this article provides the Java Interface Hardware service for the application on the frameworks layer. CD to Frameworks/base/core/java/android/os directory, add Igpioservice.aidl:P
Android from hardware to application: Step by Step 5-add hardware services to the Frameworks Layer
The Android Frameworks layer provides hardware services. Android apps can call these hardware services to implement hardware control and functions. Next, in the previous article, this article will provide the java interface hardware service for the
HTTP (hypertext Transfer Protocol Hypertext Transfer Protocol) is based on TCP, using port number 80 or 8080.Whenever you enter a Web address or click a link in a browser, the browser extracts the page information from the server via the HTTP protocol , which is now the most frequently used application layer protocol.The principle is simple:
After clicking on a link, the browser initiates a TCP con
The Winform application implements the universal Mask Layer 2 and the winform mask.
Previously, we have published Winform application universal mask layer and Winform application universal message window. These two mask layers are based on the pop-up window, today we will sh
Some strategic code, algorithm code, and
The code that is not related to the driver's internal API can be used at the application layer for testing,
To speed up writing,
This is obvious, and the application layer has its advantages in this regard.
How to implement this function.
Mainly writing two files
One is the sour
How to view system time on the Linux Application Layer
I. Basic concepts:1. linux system time and hardware time:System Time: Generally, it is the time we run the date command to view the time. in Linux, all the time calls (except the command for directly accessing the hardware time) use this time.Hardware time: the time in the BIOS on the motherboard, which is maintained by the battery power of the motherbo
HTTP is present here as an Application layer protocol . Understanding the Application layer protocol is critical because in many cases we use HTTP as a transport protocol. HTTP in soap is used as a transport protocol.
GET,POST,PUT, there areDELETEis the action defined on the resource. With these operations, we do n
Application Layer Paging Technology
Caching data in the application layer/logical layer and displaying the data in a segmented display
Done by code
Advantages: Less query data, each return results quickly
Disadvantage: First query full, consuming
In network applications, we will focus on the introduction of Layer 4. For most applications, we will involve the layer-4 TCP and UDP protocols. Therefore, there are many articles about these two protocols. This article will focus on the relationship between the two and the way they work.
User Datagram Protocol (UDP)
Applications that require minimal network overhead and do not require packet loss or out-of
website, it provides a free discussion area for Internet users. Users can be based on the need to publish articles on the forum, ask questions and express their views, commonly known as post or irrigation. At the same time, Internet users can also browse other people's posts in the Forum, and can reply to the article. Therefore a typical BBS system should generally provide the following functions: ① member Management, ② discussion area articles, ③ published new articles, ④ background management
Now, perhaps few people know about CORBA, and those who know the orb are easy to understand Web service and even Web applications today.A Web application can generally be divided into 5 layers and 1 facets:1) Operating environment: OS, Web container, CGI, etc.2) Application framework: Thinkphp,rails,django, etc.3) application itself: forum, social, blog, etc.4) F
in front of the decorated function, decorate multiple functions, add @decorator in front of each function@login ("QQ") # test = Timmer (Test) = wrapper, called when test () = wrapper (), which describes the transmission problem of the parameter# test (*ARGS,**KV) = wrapper (*ARGS,**KV)def test ():Print ("Function test begins running.")Time.sleep (0.2)Print ("Function test ends running.")Return "Test"Print ("Replace with 3-layer adorner function name:
dreamweaver| skills in the Dreamweaver can not be ordinary text directly to the special effects, this may be the designer did not think of this problem. Really, can't you? Of course, you just need to change a little code to see the effect first.
>> How to give text layer effects ( See examples )
1. First enter the text you want to do special effects, for it to do a link, whatever the link.
2. Build a layer
Label:OverviewThis article has two purposes:1. Introduction to the high availability of the TimesTen Global Cache grid2. A simple process to establish and clean up the global cache grid is given, and there is an article in front of it: TimesTen Application Layer Database Cache learning: 13. Global data cache (cache grid), but the cache group is too complexCreate a simple global Cache GridFirst set up two Ti
In multi-Tier Application (N-Tier) environments, how to update objects is a complex topic. This article discusses how the latest ADO. NET Entity Framework 4 Beta 2 (EF4) implements object update in multi-tier applications and the middle layer. The following example shows a Web application (such as ASP. net mvc) is particularly useful for reference, because in the
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