Cisco Training CCNA IP Addressing - Part 3 of 5

John Mills CCIE #5037 teaches part three in this series. In this section, he discusses the requirement for subnet masks and defines their operation.

Category:

Howto & Style

Tags:

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

[punxz18]

john how did you have a subnet mask? like, 172.16.2.17 how did the subnet mask become 255.255.0.0? (in the next part) may i IM you for quick response questions? i'm self studying CCNA and you are a big help to me thanks

[panchotraining]

Hi,

The address is 172.16.2.17 with a subnet mask of 255.255.0.0 This means the first 16 bits (255.255) are to be considered as network and the last 16 bits (0.0) should be considered host space. Therefore the 172.16. part of the address is the network portion, while the 2.17 part is a host or computer on that bit of wire. If you looked at a router's routing table you find an entry for 172.16.0.0, the network portion only. I will be shortly putting the entire CCNA on the net, stay tuned!

[mlbaker1976]

good video!!!!!!!!!!

[munawar1989]

Wat is the end user in this the network or the host.And why we assign an subnet mask Define the term too?

[shaney1981]

Please help John. My rooter is not rooting packets like a rooter should root!

[majesty20091]

@punxz18 I know this is old but i thought id answer anyway. Subnet mask 255.25.0.0 indicates its a Class B address. And if you remember correctly, the address range in which you get in Class B is between 128-191. This means any address between 128 to 191 is categorized as a Class B address. The first part of the address is 172. This is between the range of Class B address range, therefore the subnet mask would be 255.255.0.0.. If it were Class C, it wud b 255.255.255.0, or Class A as 255.0.0.0

[johnny5gr]

amazing guy... Simple and beautiful stuff.. Thank you very much..

[robinderover]

Too bad the videoquality is low, i'm having difficulty to read the numbers abit. Tho im very happy i found your channel, it helps me alot with my CCNA

[MrGhaz12345]

rooter? lol

[hakeem01]

This is all based on IPV4. How would you do this for IPV6?

[hakeem01]

@panchotraining

Man, that is freaking awesome that you respond to questions being asked. This is great!

[1conniejean]

I literally fell in love with these videos, they tie all I've learned in class into my brain finally, so I appreciate the videos very much....Thank you for your excellent presentation of the material and your manners are very pleasant to hear. I just love your English so I replay over and over to sink in the material of course and to hear you speak. Outstanding! Your efforts are definitely appreciated on my behalf...

[bluesamir]

Thank you very very much for your great help!!!