Connect with us

Computer

Explain What is Firewall in network? Type of Firewalls

Published

on

What is Firewall in network
Spread the love

Firewall keeps protection of the internet or computer from viruses, threats. In this article, I Explain what is Firewall in-network? Type of firewalls Network.

What is a Firewall in-network?

Firewalls are procedures for protecting a local system or network of systems from network-based security threats. At the same time accessing the outside world via wide-area networks and the internet. To build, these things help router, server, software. Actually, it is a system or group of a system that enforces an access control policy between two networks. These are important for Firewall.

Read More: What is Authentication and Authorization, Digital signatures, Biometric

The firewall helps to permit some traffic and block unwanted traffic.

  1. Service Control can access Inbound and Outbound links which determines the type of internet services. The Firewall may filter traffic on the basis of IP address and TCP port number. It provides proxy software that receives and interprets each service request before processing it.
  2. Direction Control controls the direction in which a particular service request may be initiated and also allow it to flow through the firewall.
  3. Data Control control access to service, according to which the user is attempting to access it. This feature perimeter for the user inside the firewall. This feature also may be applied for incoming external traffic which requires some authentication procedures.
  4. Behavior Control controls how particular services are use. For example, it may filter the emails to eliminate spam or it may enable access to only a portion of the information on a local webserver.

Read More: Top 5 Best Web Browsers 2020

Classification of Firewalls Network


  • Application Gateways

These are known as proxy servers. This software runs at the Application Layer of the ISO Reference Model. This is most secure because they don’t allow any time to pass by default, but need to have the programs written and turned on in order to begin passing traffic.

  • Packet Filtering 

Packet filtering is a technique whereby routers have ACLs(Access Control Lists) Turned on. By default, a router will pass all traffic sent it, and will do so without any sort of restrictions. Employing ACLs is a method for enforcing your security policy with regard to what sorts of access you allow the outside world to have to your internet network and vice versa.

  • Hybrid Systems

In an attempt to marry the security of the application layer gateways with the flexibility and speed of packet filtering, some vendors have created systems that use the principles of both. The application layer Approved some of that system which is new. After that, the remaining Connection is passed down to the session layer. Then the connection ensures that only packets approved.


I hope you get the all information about the Firewall in the network, type of firewall. If you like this article, you can share and comment. So that we too have a chance to learn something from your ideas and improve something. 🙂

Read Also: 

Continue Reading
Click to comment

Leave a Reply

Your email address will not be published.

Computer

Explain How to Write Curve,bend and wrap text in ms word

Published

on

By

How Write Curve text in ms word
Spread the love

Microsoft Word is one the most useful Software for office work, Student presentation, and many more. We use Curve, bend, and wrap text in ms word many times as an office, collage, School presentation Heading. In this article, You will know how to Write Curve, bend, and wrap text in ms word Step by step.

Why do we use Curve, bend, and wrap text in ms word?

Curved text is used when you design a flyer, newsletter, and logo in your Word document to enhance the look of the presentation. Microsoft Word has a very easy way to Write Curve, bend, and wrap text.

How to Write Curve, bend, and wrap text in MS Word Step by step:

Step 1: Open the new or an existing Word document.

Step 2: Highlight or select the text that you want to curve, bend, or warp.

Step 3: Go to the Insert tab on the Ribbon and click on the WordArt icon in the Text section.

Read Also: What is Mail Merge in MS word, How to use it

M S Word Step 1

Step 4: A list of WordArt will appear. Select the letter style from the WordArt list to apply to the text.

WordArt List

Step 5: Once WordArt is added to your text, a new menu Drawing tool is created automatically. Now, go to the Format tab on the Ribbon and click on the drop-down icon then click Text Efforts in the WordArt Styles section.

Text Effect in ms word

Step 6: Click on the Transform option from the Text Effects drop-down menu. Select the curve that you want to apply in the selected text.

How to Write Curve Text in ms word

Result: Now your Selected word is Transformed in your chosen style(Curve, bend, and wrap).

Carve text in Ms Word

 

I hope you get the all information about How to Write Curve, bend, and wrap text in ms word. If you like this article, you can share and comment. So that we too have a chance to learn something from your ideas and improve something.

Read Also:

 

 

Continue Reading

Computer

Explain Lookup function in Excel | Explain V and H lookup Function

Published

on

By

Explain Lookup function in Excel
Spread the love

Lookup is one of the most used full functions in Microsoft Excel. It’s used to categorize under Excel Lookup and reference functions. In this article, I explain What is the Lookup function in Excel | Explain V and H lookup Function

Explain Lookup function in Excel

The LOOKUP Function is categorized under Excel Lookup and reference functions. This section discusses various techniques that you can use to look UP a value in a range of data Excel has three functions(LookUP, V LookUP, H LookUP) designed for this task.

A Look-UP formula essentially returns a value from a table by looking up another related value. A common telephone directory provides a good analogy. If you want to find a person’s telephone number, You first locate the name and then retrieve the corresponding number.

Example of LookUp Function in Excel :

In Worksheet that uses Several look UP formulas. This Worksheet Contains a table of employee data, beginning in row 7. This range name is EmpData. When you enter the last name into cell C2, lookup formulas in D2:G2 retrieve the matching information from the table. If the last name does not appear in column C, the formulas return.

Explain Lookup function in Excel

The following lookup formulas use the Vlookup function:

  • D2 = VLOOKUP (C2, EmpData,2,FALSE)
  • E2 = VLOOKUP (C2, EmpData,3,FALSE)
  • F2 = VLOOKUP (C2, EmpData,4,FALSE)
  • G2 = VLOOKUP (C2, EmpData,5,FALSE)

 

Explain V-Lookup Function in Excel


The VLookup function looks up the value in the first column of the lookup table and returns the corresponding value in a specified table column. So, the lookup table arranges vertically.

The syntax  for the VLookUp Function is: VLOOKUP(lookup_value,table_array,col_index_num,range_lookup)

The VLookup Function’s arguments are as follows:

  • lookup_value: The value is to be in the first column of the lookup table.
  • table_array: The range that contains the lookup table.
  • col_index_num: The column number within the table from which the matching value is in return.
  • range_lookup: Optional. If TRUE or omitted, an approximate match is returned. However, If FALSE, Vlookup will search for an exact match and, if Vlookup can’t find an exact match, the function returns #/NA.

Explain H-Lookup Function in Excel


The HLookup function works just like the VLookup function except that the lookup table is arranged horizontally instead of vertically. The HLookup function looks up the value in the first row of the lookup table and returns the corresponding value in a specified table row.

The syntax  for the HLookUp Function is: HLOOKUP(lookup_value,table_array,row_index_num,range_lookup)

The HLookup function’s arguments are as follows:

  • lookup_value: The value is to be in the first row of the lookup table.
  • table_array: The range that contains the lookup table.
  • row_index_num: The row number within the table from which the matching value is in return.
  • range_lookup: Optional. If TRUE or omitted, an approximate match is returned. However, If FALSE, Vlookup will search for an exact match and, if Vlookup can’t find an exact match, the function returns #/NA.

I hope you get the all information about Explain Lookup function. V and H lookup Function in Excel with Example. If you like this article, you can share and comment. So that we too have a chance to learn something from your ideas and improve something.

Read Also:

 

Continue Reading

Computer

Difference between Vector and Raster graphics?Example

Published

on

By

Difference between Vector and Raster graphics with Example
Spread the love

Graphics help us to see the photo, video, Animation Popularly, and Vector Graphics are sharp and detailed than Raster Graphics. In this article, I Explain the Difference between Vector and Raster graphics with Examples.

What is the difference between Vector and Raster graphics?

Graphics are part of Multimedia. In Digital media like Photo, Video, Animation all these things are made by graphics. Graphics are two types Vector Graphics and Raster Graphics.

Vector Graphics

Raster Graphics

Vector Graphics are composed of paths. Raster graphics are composed of pixels.
Vector Graphics such as a.eps file or Adobe Illustrator file are composed of paths or lines, that are either straight or curved. Raster graphics Such as a .gif .jpeg is arranging of pixels of various colors, which together form an image.
The data file for a Vector image contains the points where the paths and ends how much the path curve, and the colors that either border or fill the paths. Raster graphics, on the other hand, become “blocky” since each pixel increases in size as the image is larger.
Vector Graphics is Capable of detailed editing. Raster graphics are Less detailed but offer precise paths.

Read Also: What is Multimedia in Computer With Example

Difference between Vector and Raster graphics with Example

Example of Vector Graphics Software with Format:

  1. Adobe Illustrator.
  2. CorelDraw.

Vector Graphics typically saved as EPS, AI, SVG, PDF Format.

Example of Raster graphics Software with Format:

  1. Adobe Photoshop.
  2. Gimp.

Raster Graphics saved as JPG, GIF, PNG, TIF, BMP Format.


I hope you get the all information about the difference between Vector and Raster graphics with Example. If you like this article, you can share and comment. So that we too have a chance to learn something from your ideas and improve something.

Read Also:

Continue Reading

trending