ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

Remember IP address Classs, Private Address Space and Default Subnet Masks

Updated on July 5, 2011

I always mention to memorize IP address Classes, Private Address Space and Default Subnet Masks. You must have to remember them. Without remembering them it's quite harder to find out the answers related to IP addressing and subnetting. I think you are already familiar the necessity of learning IP addressing and subnetting. Any CCNA exam or job exam or interview exam, must set some of the questions. So, I'm telling you seriously, to be the boss of IP addressing and subnetting, you must have to remember the class of IP addresses, private address space and default subnet masks. These are never changing. So, memorize them. This page only contains IP address classes, private address space and default subnet masks. The only things you need to remember is mentioned this page.

[Note: Visit Subnetting Index or type http://hubpages.com/hub/Subnet to your browser address bar to learn a-to-z of subnetting. Many examples are there to make you a smart master of subnetting.]

IP Address Classes

Each IP address has 32 bits (in IPv4). These 32 bits are divided into 4 blocks. Each block is separated by a dot (.). IP address can be classified into five classes. They are defined as Class A, Class B, Class C, Class D and Class E. Remember the following chart:

Class Name     Range
---------------------
Class A          1-127
Class B        128-191
Class C        192-223
Class D        224-239
Class E        240-255

Note:

  • Class D is reserved for multicast purposes.
  • Class E addresses are reserved for experimental purpose only or for future research purposes.

Private Address Space

The following private address space you need to remember:

Class Name     Address Space Range
-------------------------------------------------
Class A        10.0.0.0      to    10.255.255.255
Class B        172.16.0.0    to    172.31.255.255
Class C        192.168.0.0   to    192.168.255.255

Default Subnet Mask

The following default subnet mask you need to remember:

Class Name     Default Subnet Masks
---------------------------------
Class A        255.0.0.0
Class B        255.255.0.0
Class C        255.255.255.0

Please memorize the above IP address classes and their ranges, Private IP address space and Default subnet masks. They are very necessary when you will do subnetting and address calculating. So, memorize them all.

© Written by rancidTaste

Comments

    0 of 8192 characters used
    Post Comment

    • profile image

      oshinkoya babatunde 

      6 years ago

      pls, i want to know why ip addresses are grouped into five classes. what is the significance of this

    • profile image

      mallikarjuna 

      6 years ago

      class a subnet masks how to use

    • profile image

      Binish Baby 

      8 years ago

      thanks

    working

    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, hubpages.com uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at: https://hubpages.com/privacy-policy#gdpr

    Show Details
    Necessary
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the googleapis.com or gstatic.com domains, for performance and efficiency reasons. (Privacy Policy)
    Features
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Marketing
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Statistics
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)