benefits of subnetting

traffic of LAN. In addition, the price of a gigabit router is unacceptable. If you use a layer-3 Switch to connect to different subnets or VLANs through a gigabit or 10-Gigabit port, after Dividing subnets economically, subnets must rely on routers for communication. Therefore, layer-3 switches are ideal devices for connecting subnets. Advantages of using a layer-3 Switch: In addition to excellent performance, layer-3 switches have some features that traditional layer-2 switches do not have. T

As the name suggests, the factory can process parts, and the factory mode in the PHP program also has the same function. It is convenient to use a static factory method to instantiate a class, so what are the benefits of doing so? My understanding of PHP design patterns is as follows:In general, when instantiating a class, we will give it some parameters so that we can provide the expected results according to different parameters during its analysis.

Do not write at the end of the PHP file? What are the benefits of amp; gt; // This is B. php Include a. php Session_start (); ?> I have seen that many php files do not contain the php Terminator. today I see a demo, which just Explains No.> The benefit of the Terminator.The following is a. php:Pay attention to the fourth line, the fifth line) Include File. php Ses

This article gives a detailed analysis of the benefits of the PHP factory model. if you need a friend, as the name suggests, the factory can process parts, the factory mode in the PHP program also has the same function, so that you can easily use a static factory method to instantiate a class. What are the advantages of doing so? My understanding of PHP design patterns is as follows: In general, when instantiating a class, we will give it some paramet

generate the red box inside the field, you just add the instructions on the line. Finally click Save.Fourth step: Export the document This function is good, the exported document format is also very beautiful. Such as650) this.width=650; "style=" width:800px;height:300px; "src=" http://ocrlqrwod.bkt.clouddn.com/204151_heNS_ 2405364.png "alt=" 204151_hens_2405364.png "/>650) this.width=650; "style=" width:800px;height:300px; "src=" http://ocrlqrwod.bkt.clouddn.com/204219_0m1Z_ 2405364.png "alt="

Ubuntu: Upgrade benefits-general Linux technology-Linux technology and application information. For more information, see the following. After successfully upgrading the Teaching and Research Section server to UBUNTU8.04server (LTS) this afternoon, Senior Brother Li Jianmin repeatedly asked to solve the problems left after the desktop was installed. This server was previously not intended to be installed on the desktop. Every time I log on to my compu

This article mainly describes the actual operation steps of DB2 9.7 SQL compatibility and the benefits of DB2 9.7 SQL compatibility. At the same time, this article also describes the SQL features, the following is a detailed description of the main content of the article. I hope you will have a better understanding of it after browsing. Developers! Do you have Oracle database skills? Do you want to reuse PL/SQL knowledge and Code on another database

engineer handed over to Microsoft a Microsoft cloud service-based AOSP platform program, but was rejected by Microsoft, it seems, Nokia's X family will be forced to join the Windows Phone program.It's not just Google that's developing Android, but it's definitely the most attractive and the best solution for you. AOSP ensures that Android is still the second most attractive option in the mobile operating system and makes it easy for users to upgrade to a more appealing Google Android system whe

then click ' Fix Issue ' to let Apple generate provisioning profiles for us.7. Then you can run it on your phone.8. If you are prompted with "Could not launch" ... "(Project name)", this is an app that Apple has not audited for security reasons, and is not trusted. The project has gone to your phone, just can't run, prompting you, "untrusted developer". Set a trust on the phone, if not set, please refer to my another article. IOS9 Tips for untrusted developers how to handleiOS developer

. Defines the method that enumerates the values themselves.Before we see that we can define some methods for enum, we can even define a method for each enumeration value. Thus, the example of the ToString that we have previously covered can be rewritten as such.public enum Color {Red {Public String toString () {return "Color.Red";}},Green {Public String toString () {return "Color.green";}},blue{Public String toString () {return "Color.Blue";}};}Logically this is clearer than providing a "global"

In Java, we know that there are default package visibility access levels in addition to public and private,protected, though, many times for reasons of early design flaws, we need to access some packages or protected the visibility level. This time is more troublesome, if the choice and target service in the same package, always look strange, if it is inherited as a subclass, it is even more strange. However, we do not want to declare the visibility of the interface service as public.In C + +, t

outside the industrial chainMobile Internet Final destination is bound to be integrated into the general public's daily life, so that our lives in the mobile more and more colorful, so innovation should not only be confined in the industrial chain, but should go out, to win the attitude of looking for a broader world.Keymob Mobile advertising experts said that in order to get the most profit under the mobile Internet, can not simply move the traditional internet business model to mobile phones,

. Hibernate AdvantageA) hibernate is a JDBC lightweight package that takes up less memory and performs better. In contrast to JDBC, if the people who develop JDBC have a strong technical ability, hibernate execution is less efficient than JDBC, but most of the time it is impossible for programmers to achieve maximum efficiency when using JDBC, and hibernate can help most developers to run more efficiently.b) Can introduce third-party level two cache, improve system query efficiency, reduce the e

company's image. 3. Internal management. Through the company mailbox can be independent management of each department, employee mailbox, at any time according to Enterprise management needs to set up, service in the company's internal management. 4. Office applications. Company Mailbox organization Address Book, mailing list management, meeting and schedule, important mail, mass mailing and other functions to fully consider the characteristics of enterprise users, so that the enterprise mail ex

The index allows the server to navigate across the SU to the specified location. But this disease is not the only function of the index, as you can see from the current location, the index has some additional effects depending on the data structure in which the index is created.The most common is the B-tree index, which stores data according to attributes, so MySQL can be used to do order by and group by operations. Because the data is ordered, B-tree also stores the related column values togeth

statements in other languages.Being.size>"Small">This would be processed ifIt is small>"Medium">This would be processed ifIt is medium>"Large">This would be processed ifIt is large>>This would be processed ifIt is neither>PrecautionsThe FTL is case-sensitive, so the list is the correct FTL instruction, and list is not; ${name} and ${name} are differentInterpolation can only be used in textThe FTL tag cannot be located inside another FTL tag.Annotations can be located inside the FTL tag and inte

, shelf write.3. Signature. Write in the text under the right point. If the person or unit that you are sending is familiar with you, just put your name on the line, if the person or unit receiving something unfamiliar with the person or unit that sent the thing, write the unit name in front of the name in order to find it. If the person or unit receives the thing many, the person or the unit that receives the thing also should write the unit name and write the personal baby name. Stamp or press

only solve the problem of open lag, but also make the product line more intuitive.Reuse problem: Storyboad does not reuse, reusable components can be encapsulated with nib and then introduced into Storyboad.So when do we use storyboard, xib, and pure code?(1) When to use storyboard? Organize multiple view hierarchies, the legendary segue. When using a template for some list or table cell. Use storyboard as much as possible with storyboard. When do I not recommend the use of storyboard?Dynamic o

Cloud Wheat decoration Designers all from the national first-line decoration company brand. More than 5 years working experience in design industry, good at all kinds of classic style design and mixing of various styles. Can design a high level of work according to the different requirements of the owners. During the event, customers can choose their own designers.Construction aspects1, gold-medal construction staff to manage the construction at all times to ensure smooth or in advance standard

declared in the interface can be implemented in many different implementations of the interface method, such as different database access operations, may be corresponding to a number of unnecessary implementation classes, if a project in the subsequent maintenance needs to change the database type, then just add an implementation class, You can then modify the implementation class name in the configuration file so that you do not have to open the original Java file rewrite, which facilitates la