tag:blogger.com,1999:blog-4088979.post110964585460663746..comments2023-10-16T06:06:25.012-04:00Comments on TaoSecurity Blog: On the CCNA RoadRichard Bejtlichhttp://www.blogger.com/profile/13512184196416665417noreply@blogger.comBlogger12125tag:blogger.com,1999:blog-4088979.post-87283030423310754112012-01-03T03:09:50.608-05:002012-01-03T03:09:50.608-05:00I've been been following/reading lammle and be...I've been been following/reading lammle and bejtich for years, go figures they run into each other lol.Divinehttps://www.blogger.com/profile/02213168919078310583noreply@blogger.comtag:blogger.com,1999:blog-4088979.post-12096991872713274332009-07-05T08:53:27.922-04:002009-07-05T08:53:27.922-04:00This comment has been removed by a blog administrator.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4088979.post-8348494936666652982007-05-29T09:21:00.000-04:002007-05-29T09:21:00.000-04:00To calculate the magic number, subtract the subnet...To calculate the magic number, subtract the subnet mask from 256.<BR/><BR/>From the example given above:<BR/>256 - 192 = 64Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4088979.post-89927269405130208992007-05-29T09:12:00.000-04:002007-05-29T09:12:00.000-04:00Sorry. It was just by dumb luck that 64 was the m...Sorry. It was just by dumb luck that 64 was the magic number and also the subnet mask.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4088979.post-35657619375055997422007-05-29T09:09:00.000-04:002007-05-29T09:09:00.000-04:00(not the same as the original "magic number" poste...(not the same as the original "magic number" poster)<BR/><BR/>The magic number is just a quick way to calculate the subnet mask & broadcast address without converting to binary and back.<BR/><BR/>To calculate the magic number for networking, you calculate how many hosts that a given subnet uses.<BR/>For example, if the Class C subnet mask was 255.255.255.192, the total # of hosts would be (2^6)-2. But the magic number would be just the 2^6 (ie 64). Given any ip address, you can figure out the subnet number by multiplying the magic number and finding the closest number that does not exceed the IP address. Then the broadcast number by adding the magic number minus 1 to that number.<BR/>Given IP address: 192.168.3.93<BR/>You would know that the possible subnets are 0,64,128,192. (64x0, 64x1, 64x2...). Since 64 is the highest number without going over, it is the winner.<BR/>The Broadcast address would be 127 (64x1 from above + 64-1)Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4088979.post-1110422824058978552005-03-09T21:47:00.000-05:002005-03-09T21:47:00.000-05:00Re: lab set-up -- GlobalNet Training provided each...Re: lab set-up -- GlobalNet Training provided each student with his/her own 2621 router, 2500 router, 804 router, and 2950 switch. Each pair of students also shared a 3550 switch and another 2500 router. This arrangement beats any other CCNA class I've researched.<br /><br />Re: subnetting -- I'm not familiar with the "magic number" method. Can you elaborate?Richard Bejtlichhttps://www.blogger.com/profile/13512184196416665417noreply@blogger.comtag:blogger.com,1999:blog-4088979.post-1110394734618805182005-03-09T13:58:00.000-05:002005-03-09T13:58:00.000-05:00Richard,
Does this 6-second method have anything ...Richard,<br /><br />Does this 6-second method have anything to do w/ the "magic number" method? I'm currently reading the Cisco Press CCNA book which teaches this method.<br /><br />-DustinAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-4088979.post-1109691465649205412005-03-01T10:37:00.000-05:002005-03-01T10:37:00.000-05:00Please post some highligts.Please post some highligts.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4088979.post-1109667935698075362005-03-01T04:05:00.000-05:002005-03-01T04:05:00.000-05:00Good luck with it, certainly sounds like you're go...Good luck with it, certainly sounds like you're going about it the right way. <br />By all accounts it's a hard exam.<br /><br />I'm also studying for my CCNA using the Lammle book (not the Lammle person).Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4088979.post-1109654481887637212005-03-01T00:21:00.000-05:002005-03-01T00:21:00.000-05:00Way to go Richard, I used the first edition Lamle ...Way to go Richard, I used the first edition Lamle book to prepare for the CCNA. What a treat that you actually get to be trained by him!<br /><br />-KAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-4088979.post-1109650653618139662005-02-28T23:17:00.000-05:002005-02-28T23:17:00.000-05:00You will certainly have to keep us posted on your ...You will certainly have to keep us posted on your adventure towards the CCNA! I look forward to hearing how things go, and basically living vicariously through your own workshop. ;)<br />-LonerVampAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-4088979.post-1109648549711241962005-02-28T22:42:00.000-05:002005-02-28T22:42:00.000-05:00How does your lab look like?How does your lab look like?Anonymousnoreply@blogger.com