Duration 6:49

Compute IP range given CIDR address

by Michele C. Weigle

69 063 watched

662

Published 6 Jun 2014

Example of computing the IP address range and netmask given a CIDR address. Dr. Michele C. Weigle Old Dominion University October 9, 2013 (Note: previous upload in different account had 2244 views before it was moved)

Tags

Classless Inter-Domain Routing

IP Address (Protocol)

Netmask

Comments - 48

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@juangutierrez33804 years ago So helpful! Getting to the " 62" at the end was tricky because it took me a second to realize it was translated from binary, but once i did, everything was great! Thank you! 1
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@raulhatescheese3 years ago After countless video on this subject. This one just made it click. Thank you dr. Weigle!
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@govindrai933 years ago Helped me solidify my understanding from the other 10 cidr videos i watched. Thank you! 1
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@scottfrenz8 years ago Thank you, dr. Weigle! Explained very well. Much appreciated. 1
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@zeko20503 years ago You have solved a problem that out teachers here in germany didint even know how to mention it or calculate it. Thanks a lot.
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@kabishraj4 years ago Thank you for the detailed information. Really helped me to understand the concept behind cidr.
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@rigvedagames98997 years ago Helpfull. But the last part about subnet mask is not clear
whats the calculation involved in determining it. 3
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@abdouroihamanemmadi4228 years ago Thank you for sharing. It really helped me for my exam. 1
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@mkhantxut4 years ago Thank you for explaining this concept so clearly.
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@AccurateBurn4 years ago I got a little bit confused with the host and network part of the ip address, but the rest was all smooth sailing. Thank you!
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@Elusivekid7777 years ago Thank you for that. Helped me a lot to understand whats going on.
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@idscomm9 years ago Hello michele, i watched quite the few videos as i try to wrap my head around this cidr (preparing for my network+ exam) and so far your method seems to . ...Expand 1
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@aliShah-bh3dt3 years ago Greatly appreciate it miss. Thank u so much.
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@robertoreyes6180last year Seora como la amo me ha salvado de mucho.
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@mp3ranch5 years ago Omg you= made is so simple for me to understand. Thank you so much.
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@igajohnbosco24285 years ago Everything was making sense until when the last usable ip was derived from 1110. Meaning i could not even figure out the ips in between since i dont know how we coming up with 1110.
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@miki23407 years ago It is cool
thanks for that.
helped me a lot to understand whats going on.
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@richcarbba62644 years ago {" excellent" " thank you!
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@eatpastacodefasta88844 years ago What happens if given IP is not in the form of x.x.x.0? Is it still possible to find 1st & last address if it looks smth like this: /20 ???
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@Saady2s5 years ago Where did you get the ' 2' from? Like you doing 2 to the power of 6 but, where 2 came from? 2
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@SyDiko4 years ago I know you' re saying this forsake and i' m not sure when this video was recorded, but you said the first assignable ip address is going to be 1 + the network id, but that' s not always true. For example, if you have 22 bit subnet mask there are cases where you could assign a host of x. X. X. 0 and the host range starts at x. X. X. 1. ...Expand
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@ranjotghumaan5884 years ago Is the broadcast address or 63?, after calculating it should be 63, right?
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@tnndll42943 years ago Videos like this need to give more than just one ip address example for people to learn.
how about ? />Also, she mentions a scenario where you have to use one additional octet if you have /24 bits. Show an example of that scenario. Is this stuff really that hard, or is it just not being taught well? .. ...Expand 1
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@jokatech3 years ago This formula looks tidy but when you have 20 bits you wind up with an assignable 2048 which clearly is a problem.
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@hillz4059 years ago 62 must be 64 right 256-64=192 which is.
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@idscomm9 years ago Hello michele, i watched quite the few videos as i try to wrap my head around this cidr (preparing for my network+ exam) and so far your method seems to . ...Expand 1
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@SyDiko4 years ago I know you' re saying this forsake and i' m not sure when this video was recorded, but you said the first assignable ip address is going to be 1 + the network id, but that' s not always true. For example, if you have 22 bit subnet mask there are cases where you could assign a host of x. X. X. 0 and the host range starts at x. X. X. 1. ...Expand
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@tnndll42943 years ago Videos like this need to give more than just one ip address example for people to learn.
how about ? />Also, she mentions a scenario where you have to use one additional octet if you have /24 bits. Show an example of that scenario. Is this stuff really that hard, or is it just not being taught well? .. ...Expand 1