IOS Flows (feat. Hamlet B Da Emcee)

Yo,

Big Ham,

Know what i'm saying

representing Browhard counties finest

You know what i'm saying.

About to drop the IOS internet... operating system flow, yo!!!

Ay yo Don't get stress!!!

At first IOS can seem complex,

Lots of lines in configuration text.

CLI elements, syntax and contexts.

Might put your patience to the test,

We Start with simple concepts,

Build the command sets,

The ones that built the internet,

Comprehend?

Now's the time to use your intellect.

Over time you'll understand design intent,

Most start with the CCNA,

Adding this to your certification array,

Can substantially increase your net gross pay.

Modern networks today, connect computers in many ways,

Ethernet wire, fiber optics, and radio waves,

Cell towers 4G LTE around where I stay,

Act as smart phone relays.

Used for remote network connections and game play.

Routers and switches work a certain way,

Peep this,

Switches have Asics that switch quick,

Ports to connect other equipment,

Ethernet Cables labeled with letters and digits.

Status Lights shows transmission of data fragments.

Brackets in the box so you can stack it rack it,

Standard 1 R unit, so it should fit.

Cables get tied with either velcro zip.

Next we got the UPS Power switch that gets hit,

All the lights get lit,

Then now it's, It programming the switch.

Learns mac addresses from different components,

B patient, boot process takes a moment,

While we wait on that, lets talk about the router,

This device has the layer 3 powers,

Responsible for moving terabytes in hours.

These come as either rack mount units or table towers.

Routers are the technology used in... connecting industries,

Strategically placed in colocation facilities,

They sometimes have their own hard drives and memory.

Ethernet, console, and sometimes a port called auxiliary,

POE that operates at 48v,

volts electricity,

Powers devices efficiently.

Still this technology is found in switches mostly,

Powered device gets the acronym of PD,

Switches are mostly called PSEs.

Power sourcing equipment to many.

But you might not work correctly if your cable is too lengthy,

Or if there's a internal break,

Bent to a certain degree.

Always make sure your cables are crimped properly.

Customer premise equipment we call CPE,

ISPs provide the WAN connectivity.

Can be Fiber optic or Coax similar to TV,

DSL protocols we use like PPPoE,

That went away eventually,

Evolution of Docis Technology,

As far as the GUI, it might not work initially,

Certain devices ship un-configured from the factory.

So you have to use a CLI utility,

Tera term, hyper terminal, even the putty,

Some routers hand out IPs

Default configuration called DHCP,

Connect the PC to the IP that's assigned auto...dynamically,

Routers update routes in milliseconds G.

And if you use the routing protocols that make it easy.

OSPF, RIP, and BGP.

And then you gotta include Cisco proprietary EIGRP.

Pass router information protocols automatically.

RIP hop count stops at 15.

Anything over that they call it counting till infinity.

OSPF has advantages.

It updates quickly.

BGP has big route tables for connectivity.

Routers have layer 3 firewall capabilities,

Packet filtering technologies,

ACLs that block on different IPs.

Also can filter on protocols like TCP and UDP.

Filter on services by name and numerically.

But the configuration has some complexity.

And to connect remotely, be sure to assign a management IP.

This is good for accessing equipment not located at your facility.

Don't use telnet, generate ssh keys,

Use secure shell to increase security.

CCTV monitor NOC activities.

Water intrusion detection sensors on HVAC.

Fire alarms, evacuation routes for the safety of the employees.

Hack ethically, and make moves responsibly.

I thank you for listening to these.

Signing off, you got the ethical hacker,

H-a-m to the l-e-t.

Nah mean...

yo

This is BrowHard County man.

We're Here to make you think.

Know what I'm saying?

This Broward

Big H here,

Big Ham

I'm saying,

Peace.