Shortest Path Bridging (SPB), specified in the IEEE 802.1aq standard, is a computer networking technology intended to simplify the creation and configuration of networks, while enabling multipath routing.
It is the replacement for the older spanning tree protocols: IEEE 802.1D, IEEE 802.1w, IEEE 802.1s. These blocked any redundant paths that could result in a layer 2 loop, whereas SPB allows all paths to be active with multiple equal cost paths, provides much larger layer 2 topologies, supports faster convergence times, and improves the efficiency by allowing traffic to load share across all paths of a mesh network. It is designed to virtually eliminate human error during configuration and preserves the plug-and-play nature that established Ethernet as the de facto protocol at Layer 2.
The technology provides logical Ethernet networks on native Ethernet infrastructures using a link state protocol to advertise both topology and logical network membership. Packets are encapsulated at the edge either in media access control-in-media access control (MAC-in-MAC) 802.1ah or tagged 802.1Q/802.1ad frames and transported only to other members of the logical network. Unicast, multicast, and broadcast are supported and all routing is on a symmetric shortest paths.
IEEE 802 refers to a family of IEEE standards dealing with local area networks and metropolitan area networks.
More specifically, the IEEE 802 standards are restricted to networks carrying variable-size packets. By contrast, in cell relay networks data is transmitted in short, uniformly sized units called cells. Isochronous networks, where data is transmitted as a steady stream of octets, or groups of octets, at regular time intervals, are also out of the scope of this standard. The number 802 was simply the next free number IEEE could assign, though “802” is sometimes associated with the date the first meeting was held — February 1980.
The services and protocols specified in IEEE 802 map to the lower two layers (Data Link and Physical) of the seven-layer OSI networking reference model. In fact, IEEE 802 splits the OSI Data Link Layer into two sub-layers named Logical Link Control (LLC) and Media Access Control (MAC), so that the layers can be listed like this:
Uh, yeah y'know, shit is wild he, heh
Can't complain though I'm alive
Healthy and all a that knahmsayin?
Just tryin' to do my thang, praise to all
Bust it that nigga Slick Rick said, I waited long time sweatin' it
I got jerked but now I'm gettin' it, hazy like asthma bizarre disaster
Stress almost held me down from bein' a master
The faster preacher, poet, a teacher, it's been so long like Monifah
Believe that I'm needed, in rappin', I breathe this
Some pick up a microphone and can't even achieve this
Oscar award winning your shit, I'm bored with it
Stop copy-catting son
(Why?)
'Cause your dog did it
Get your own lingo, make up your own jingle
Ten years later you be bitin' my single
Primo, take it downtown, swing it
Intervenin' on the board, sensimil steamin', yeah
Catch the vibe like a tribal dance
In the clubs on the low with the boy stance
Money rubbin' with a shorty got bumped by a chump
Tell him, step off, I'm doin' the hump, yeah
I say it's my world and I won't stop
And if you stand in my way you bound to get dropped
Some wish that I was gone 'cause they know I'ma win
In a minute, I'll be makin' six G's times ten
I'm the computer, printin' out data take notes
Then analyze the information and press send
Freaky like porno, Ron Jeremy saw no
Obstacle or pussy to stop him from bonin' a hoe
Me and the mic double trouble
Chicks look at us like twins, all lovable and huggable
Prognosis, on the, mic I choke out
Had the same effects from coughin', blowin' smoke out
Architect, rap technician, man listen
It's no doubt you gonna pump this in your system
My skills ill and all of that above
Confidence, I'm not worried 'bout a street buzz
I'm O.C., who you? I never heard of ya
Get out my face 'fore I turn into a motherfuckin' murderer
I want the green like indo, a mansion, a car
A wife who's never been a bimbo
Too much to ask, well, to me that's simple
Wanna retire on a yacht called the S. S. Minnow
I say it's my world and I won't stop
And if you stand in my way, you bound to get dropped
I say it's my world and I won't stop
And if you stand in my way, you bound to get dropped
I say it's my world and I won't stop
And if you stand in my way, you bound to get dropped
I say it's my world and I won't stop
And if you stand in my way, you bound to get dropped
Top choice, this here nigga got poise
Ain't a man alive who could stop my noise
I snatch a star from the sky, spark up your lye
You stand astounded wonderin' how I did it
Now you're star struck, like I truck gold
Treatin' me like a nigga havin' a million records sold
Now a star child, phenomenon like the X-Files
Rappers know I'm comin' so they go in exile
Czar in this rap shit, comin' on your mattress
Microphone fiend, I make beats do back flips
Fear me like genocide, serious
How I do it through your stereo, mysterious
O.C. do demolition, nil competition
Like robot Kong on a destroy mission
A matter of life and death you try to fight for breath
I snatch your heart from a slice through your chest
Who the best from New York to Bogota?
Who got face thinkin' they scare me with a scar, shit?
What I be bringin' is a terrible sight
A performance never again performed on the mic
I say it's my world and I won't stop
And if you stand in my way, you bound to get dropped
I say it's my world and I won't stop
And if you stand in my way, you bound to get dropped
I say it's my world and I won't stop
And if you stand in my way, you bound to get dropped
I say it's my world and I won't stop
And if you stand in my way, you bound to get dropped