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multi-client access, interactivity is strong.(3)The BS architecture does not need to upgrade multiple clients to upgrade the server. Cons: (1) on cross-browser, the BS architecture is not satisfactory. (2) It takes a lot of effort to achieve the degree of CS program.(3) The high cost of design for speed and security is the biggest problem in the BS architecture.(4) C and S interaction is a request-response pattern, which usually requires a refresh of
application-layer language (bottom-level is C/S, WINAPI, COM Ole VB, DirectX, or a custom library on a mono project), and . NET -based IL CLR Runtime Libraries, and application sets, the application domain is a great innovation for application compilation and application composition Systems , but the pros also bring drawbacks. Low-level or real-time high-performance applications that are difficult to replace c/c++,windows platforms other than the development of applications also need to cont
Ajax principles and advantages and disadvantages
1. Background of ajax technology
It is undeniable that the popularity of ajax technologies has benefited from the vigorous promotion of google. It is precisely because google earth, google suggest, gmail, and other widely used ajax technologies that have given rise to the popularity of ajax. Microsoft was also very embarrassed because Microsoft had invented
theory of DB2, however, we do not understand the allocation of memory CPU and disk resources.
Many people may think that DB2 is much more complicated than other database systems, but I think it is because these people do not know their underlying architecture and models. After understanding DB2, we will find that every module is carefully designed. If the system can be fully optimized, many common database problems will not occur.
We will introduce the adva
1. Struts
Advantages: struts is an open-source software. In addition, the advantages of struts are mainly reflected in two aspects: taglib and page navigation. Taglib is the struts tag library, which can be used flexibly to greatly improve development efficiency. The page navigation makes the system context clearer. With a configuration file, you can grasp the relationship between all parts of the system.
these kinds of frameworks, we usually use a lot of ways to create the XMLHttpRequest object ourselves, this way is more flexible than the previous several frameworks. In addition, here also mention aspnet2.0 of the asynchronous callback interface, it and Ajax can also achieve local no refresh, but its implementation is actually based on the XMLHttpRequest object, but also only support IE, of course, this is a Microsoft competition strategy.
9.ajax Application Examples
The above content is rep
Sing Xing interprets the advantages and disadvantages of mysql stored procedures, Xin Xing mysql
Common SQL statements must be compiled and executed before execution. stored procedures are a set of SQL statements to complete specific functions, it is directly compiled and stored in the database. You can call the stored procedure by specifying the name of the stored procedure.
The
source database, it can be modified for different applications.Have a very fast and stable thread-based memory allocation system, you can continue to use the surface without worrying about its stability;MySQL offers a wide variety of different user interfaces, including command-line client operations, Web browsers, and a variety of programming language interfaces, such as c+,perl,java,php, and Python. You can use a pre-packaged client, or simply write a suitable application yourself. MySQL can
Oracle elastic cloud and data warehouse provide obvious advantages. First, a single vendor provides all the basic components: Oracle's one-stop approach helps simplify licensing, support, upgrade, and integration, all these transactions are handled by a single vendor. This may help prevent vendors from repeatedly pushing each other on technical issues. Configuration, upgrade, and integration use a single ve
Advantages and disadvantages of listing a company
Listing a company is the dream and goal of many entrepreneurs. However, both advantages and disadvantages coexist in everything. Only by fully understanding it can we properly balance the situation and lead the healthy development of the company.
Positive Role of a comp
languages such as JavaScript, traditional data submission and validation work was carried out over the network to the server by the client browser. If the amount of data is large, this is an intangible waste to the resources of the network and the server. With JavaScript, data validation can be done on the client.JavaScript makes it easy to manipulate objects on various pages, and users can use JavaScript to control the appearance, state, and even operation of individual elements in the page, a
packets, such as limiting its traffic, inbound and outbound traffic, and providing QoS. 13. Good security performance: vswitches can filter MAC addresses, lock MAC addresses, and build static Mac forwarding tables. 14. Supports IEEE 802.1Q and port-based VLAN. The gvrp (Garp, VLAN Registration Protocol) and gmrp (Garp multicast Registration Protocol) in the IEEE 802.1Q VLAN are also widely supported. 15. It has the SNMP function to better manage a
Undoubtedly, the security of current information is becoming more and more important. Therefore, the system administrator tries to encrypt the data as much as possible. Even so, the "Data Encryption" plan is not the best practice, especially when backing up data.
Before discussing the advantages and disadvantages of encrypting backup data, I need to point out tha
number of users in use.NTFS file system benefits: NTFS partitioning has high security and stability and is not easy to produce file fragmentation in use. It can record the operation of the user, through a very strict restrictions on user rights, so that each user can only follow the system-assigned permissions to operate, and fully protect the system and data security. In addition, for most users, the most
Entity Framework advantages and disadvantages and usage summary Entity Framework is an ORM framework provided by Microsoft. It aims to facilitate the rapid development of data layers in small applications.
More than downloads on nuget indicate that. NET developers prefer to use EF. However, EF also has many disadvantages while providing convenience. I think EF sh
Advantages and disadvantages of JSP
Disadvantages:
1. JSP technology greatly increases product complexity. to obtain the system's cross-platform Functions and product scaling capabilities, java has developed a variety of products, such as JRE, JDK, J2EE, EJB, JSWDK, and JavaBeans, only by effectively combining them can powerful functions be produced. (deploymen
exception occurred. This convenience is not available in a compiled language.2. Another advantage is that the interpreter is easier to implement than the compiler3. One of the greatest advantages of interpretive language is its platform independence4, interpreted language can also guarantee a high degree of security-this is an urgent need for Internet applications5, the size of the intermediate language co
complex applications. The monolithic architecture is more suitable for lightweight, simple applications. If you use it to develop complex applications, it's really bad. The MicroServices architecture model can be used to build complex applications, and of course, this architectural model has its own shortcomings and challenges. In a subsequent blog, I'll delve into the microservices architecture pattern and discuss strategies such as service discovery, service deployment choices, and how to bre
); person {name: "Shijun", getname:function} console.log (c); Chinese {name: "Liyatang", Nation: "The", Constructor:function, Getnation:function, getname:function} CONSOLE.L OG (p.constructor); function person (name) {} console.log (c.constructor); Function Chinese () {} console.log (c instanceof Chinese); True Console.log (c instanceof person);
True
The above article on the three types of inheritance and the advantages and
Advantages and disadvantages of indexes
Why create an index? This is because creating an index can greatly improve the system performance. First, you can create a unique index to ensure the uniqueness of each row of data in the database table. Second, it can greatly speed up data retrieval, which is also the main reason for creating an index. Third, it can accelerate the connection between tables, especial
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