Cisco Training CCNA IP Addressing - Part 6

In the last video, we looked at how computers work out subnets, host, and broadcast addresses. Here we look at some tips and tricks to do it quickly in an exam situation.

Category:

Education

Tags:

• CCNA
• IP
• Addressing
• Cisco
• Network
• Academy
• 640-802
• CCENT
• John
• Mills
• Networking
• TCP/IP
• Training

[Superfester1959]

Thank You!!!!!!

I am going to study this stuff until It fills my dreams!

You lay this information out so that it is easy to absorb!!!!!!!!!

[kiobubba]

bit lost on this one anychance of doing it again

Love the videos by the way this has explained a great deal to me and learnt more in the past hour than any of the books has explained to me

[crazycutz]

what the hell.. going to fast.... :(

[zozepetas]

Many thanks ,great job .

[TheKevcanning]

How would you work out the broadcast adress of the 42nd and 48th usuable subnet? Given 181.152.241.69 / 26?

[zedonutube]

Mr. Mills, You do have clever way of teaching and making things easy! Many thanks!

[dkniles1]

Mr john Mills,many thank you and respect for your excellent work!

greece

[ssthao]

would it take longer to list all the possible subnets by using the magic number (256) if the subnet mask given is 255.255.255.252? In this case each subnet is an increment of 4 which means you have to go from 0, 4, 8, 12, 16 ... 252.

[RAWagner]

I have another trick for you. There is a direct relationship between the hosts and the mask.  If you write down 1, 2, 4, 8, 16, 32, 64, 128 and then match them to their hosts we see that it matches very nicely. 255, 254, 252, 248, 240, 224, 192, 128. Adding any 2 rows together will always equal 256. There are some other relationship tricks we can gather from additional information, but adding this to your training will cut the steps in half.

[LastAxis]

When he says "all the different subnets that can be created with that mask" does he mean that the IP address being the decisive factor as to which subnet is real? (for that given IP?)