Read on Twitter
Networking is an essential (paying) 
skill & I don’t see enough melanin in this bih caking. 
So I’m teaching it to whoever will listen for the next 23 days via twitter thread.
Welcome to Day 9: Switches
You ready?
Retweet.
#blacktechtwitter #blackwomengotbread
skill & I don’t see enough melanin in this bih caking. So I’m teaching it to whoever will listen for the next 23 days via twitter thread.
Welcome to Day 9: Switches
You ready?
Retweet.
#blacktechtwitter #blackwomengotbread
First thing I need you to do if you haven’t already is join my email list so you can join the fam and be notified of new threads http://cybercimone.com/links
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Catch up on days 1-8 start here: https://twitter.com/cybercimone/status/1289936469709041665
http://cybercimone.com/links Second - follow the kid to IG
http://instagram.com/cybercimone Catch up on days 1-8 start here: https://twitter.com/cybercimone/status/1289936469709041665
Finally, I’m having a 30% off sale on all of my consults & a sale on my mini guide called “The Quick Ten” 
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USE CODE: 30for30 http://gumroad.com/cybercimone
Did I mention this was an ALL DAY thing?
Did I mention you can purchase a consult now & use it whenever you want?
USE CODE: 30for30 http://gumroad.com/cybercimone
Yesterday we talked about how we send a frame! But we didn’t touch too much on a key component in that process and how it works - THE SWITCH.
No, not this Switch - although this was a bop.
THIS SWITCH. The one we use in networking to connect our devices through their cute little ports and MAC address.
So how does this work? Well once our data gets to our switch - the switch decides who our data goes to based on the MAC address.
MAC addresses are like telephone numbers. & most of the time our switch sends the data directly to who we want if it knows the number!
MAC addresses are like telephone numbers. & most of the time our switch sends the data directly to who we want if it knows the number!
MACs are unique to each device in a network and NO two devices will EVER have the same MAC address.
MAC addresses are written in hexadecimal format (made up of letters and numbers) and are 48 bits long.
MAC addresses are written in hexadecimal format (made up of letters and numbers) and are 48 bits long.
8 bits = 1 byte - so that means MAC addresses are 6 bytes long. Essentially a byte is just a chunk. Like a bite of a cookie 
The first 3 bytes (24 bits) are the Orginizationally Unique Identifier or Vendor ID and this is assigned by the IEEE.
The first 3 bytes (24 bits) are the Orginizationally Unique Identifier or Vendor ID and this is assigned by the IEEE.
The last 3 bytes (24 bits) are the Network Interface Controlloer also called the serial ID. This number is assigned by the manufacturer.
Now if our switch has seen a particular MAC address before - its no issue. Our data is going directly where we want it to go.
It’s just like texting your bestie. You know that number by heart without thinking about it. You don’t go scrolling your contacts - you just know!
It’s just like texting your bestie. You know that number by heart without thinking about it. You don’t go scrolling your contacts - you just know!
Now, when a switch DOESN’T know a MAC address...how the heck does it send data?
It does this through the use of a broadcast MAC address
FF:FF:FF:FF:FF:FF
Broadcasts go out to ALL devices and when the right device responds saying “Hey that message was for us!” ....
It does this through the use of a broadcast MAC address
FF:FF:FF:FF:FF:FF
Broadcasts go out to ALL devices and when the right device responds saying “Hey that message was for us!” ....
The switch adds that new MAC address to its very own handy dandy phonebook - a MAC address table!
And that my friends - is a switch! Did you learn something? 
I really hope so!
Networking is for everybody & nobody should be fearful of learning something they use everyday.
Be sure to join my email list so you can be notified of new threads! http://cybercimone.com/links
I really hope so! Networking is for everybody
& nobody should be fearful of learning something they use everyday.Be sure to join my email list so you can be notified of new threads!
http://cybercimone.com/links
If you enjoyed this thread & are thinking about pursuing tech further - you should check out my Network+ study bundle! 
Get certified so you can get out there! We need you and you’re capable!
$100 value for $25 ! Can’t beat it!
http://gumroad.com/l/jsZxb
Get certified so you can get out there!
We need you and you’re capable!$100 value for $25 ! Can’t beat it!
http://gumroad.com/l/jsZxb
