<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Why do you think the network portion needs to be contiguous?<div class=""><br class=""></div><div class="">Well, it does now. But that was not always the case.</div><div class=""><br class=""></div><div class=""><a href="https://www.quora.com/Why-is-the-subnet-mask-255-255-255-64-invalid/answer/Patrick-W-Gilmore" class="">https://www.quora.com/Why-is-the-subnet-mask-255-255-255-64-invalid/answer/Patrick-W-Gilmore</a></div><div class=""><a href="https://www.quora.com/Why-is-the-subnet-mask-255-255-255-64-invalid" class="">https://www.quora.com/Why-is-the-subnet-mask-255-255-255-64-invalid</a></div><div class=""><br class=""></div><div class=""><div class="">
<div style="color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><span style="font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; line-height: normal; orphans: 2; widows: 2;" class="">-- </span><br style="font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; line-height: normal; orphans: 2; widows: 2;" class=""><span style="font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; line-height: normal; orphans: 2; widows: 2;" class="">TTFN,</span><br style="font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; line-height: normal; orphans: 2; widows: 2;" class=""><span style="font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; line-height: normal; orphans: 2; widows: 2;" class="">patrick</span><br style="font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; line-height: normal; orphans: 2; widows: 2;" class=""></div></div></div></div></div></div></div></div></div></div></div>
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<div><br class=""><blockquote type="cite" class=""><div class="">On Dec 19, 2018, at 09:54, Naslund, Steve <<a href="mailto:SNaslund@medline.com" class="">SNaslund@medline.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">I am wondering how a netmask could be not contiguous when the network portion of the address must be contiguous. I suppose a bit mask could certainly be anything you want but a netmask specifically identifies the network portion of an address.<br class=""><br class="">Steve<br class=""><br class=""><blockquote type="cite" class="">I seem to remember that before the advent of VLSM and CIDR there was <br class="">no requirement for the 1 bits in the netmask to be contiguous with no <br class="">intervening 0 bits and there was always someone who tested it out on a <br class="">production network just to prove a point (usually only once)<br class=""></blockquote></div></div></blockquote></div><br class=""></div></body></html>