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Firewall has become a key component in the construction of enterprise network. But there are a lot of users, that the network has a router, you can achieve some simple packet filtering function, so why use a firewall? The following is a comparison

For most office white-collar, MSN work Standard, especially for some shielding QQ chat tool company employees, MSN is Work, life, learn the necessary communication. However, I believe that the use of people know that such a chat tool used to have an

One, using the SUMIF () formula of a single condition sum: To count the data in column C, the statistical condition is that the data in column B is "conditional one". And put the results in cell C6, we just enter the formula in the C6 cell =sumif

word2010 version compare shortcut keys for common symbols: Shortcut keys for entering some other symbol in Word: Business symbols ? The trademark indicates that the founder or inventor owns the patent. Input Method: alt+0153 The

solutions to the failure of Excel table formulas Solution to Excel Table formula failure 1: Take a basic example to illustrate that the first three columns in the table add up to calculate the fourth column totals by formula. The current data is

How to use SUMIF functions in Excel The use of the SUMIF function in Excel is to sum several cells, ranges, or references based on a specified condition. Parameters of the SUMIF function: Range,criteria,sum_range 1 range is a

There are always some design new people do not know the difference between AI and PS, they are used under what circumstances? which is better? Behance, a designer named M.a Kather, drew 12 pictures to give you a clear distinction between AI and PS.

Microsoft has launched a new service called "Microsoft WiFi" today, although it is the brand name of the original Skype WiFi service, but the service also introduced a lot of new content. Skype Wi-Fi offers over 2 million WiFi hotspots worldwide,

Looking back on the 2014-year web design field, we can see some very noteworthy trends: No code Web design platform, Parallax Scrolling, Single-screen web design and so on. Although a lot of trendy designs won't last long, there are still a few

Business elite often for customers PowerPoint presentation, but "trapeze" they do not have time to use computer to make a PowerPoint presentation, how to do? At this time the ipad such mobile terminals become the best Office tool, and to the ipad to

In a worksheet, there are usually numbers, letters, and Chinese characters. So, when we edit different types of cells, we need to constantly switch between Chinese and English input method, which not only reduces the efficiency of editing, but also

The syntax of a atan function function function: Returns the inverse tangent value. The tangent value is equal to the number parameter value because it is an angle. The returned angle value is expressed in radians, and the range is-PI/2 to PI/2.

use Excel VBA programming to draw a chair on a form Steps Open Excel and go to the Visual Basic Editor. Insert the module. Module programming. Programming in Module 1, declaring 4 functions, and writing a program that

For the computer network which is put into normal operation and service, network administrator's job is network operation, network maintenance and network management. In the modern information society, people can not leave the support of computer

Q: My printer will sometimes appear paper-less phenomenon, how to solve this problem? A: The printer is not fed can be caused by the following reasons:(1) The paper in the feed slot is too thick and must be reduced.(2) The inside of the printer

A powder is looking forward to Zen architecture processor, the author can find the latest news is about its ES version of the frequency adjustment, it is said that the 8-core summit Ridge has been able to stand to the base frequency 3150mhz,turbo 330

How to optimize SSD solid-state drive in Win8 system One, AHCI hard disk mode can improve hard disk performance, determine your solid state drive is running in AHCI mode, specific can be installed in the motherboard BIOS in front of the system set

win8.1 computer Play Click Games often occur in the blue screen of the three major solutions to the situation The computer plays the game often the blue screen freezes the solution method one: 1, first understand the blue screen before the

Have you noticed any difference in this area? Interactive designers in the collation of interactive knowledge, may forget to consider the domestic user's interactive learning ability, this subtle difference let @edc Yu Yuanqing students caught,

This article mainly introduces JS to obtain the current system date and time method, involving JavaScript operation date time of the related skills, very simple and practical, the need for friends can refer to the This article illustrates how JS