Ok that clears things up a bit but does that mean there no way to access computer A on my network from computer B going from data link, network, transport, session, presentation, application? (As far as I know this process is done automatically and can not be done manually right?)

Let me rephrase the question now I suppose
How can I access another computer on my home LAN without having to put in the username or address? (while i already know every user and password on my personal network im still looking for hands on stuff to do)

I know some of my questions seem kinda stupid sometimes im sorry for that but if i was clear on the entire thing I wouldn't need to ask questions.

well the thing is my teacher who accually teaches my class also teaches ethical hacking and she mentioned that if a "hacker" obtains your MAC address they can have free access to your PC. And I do know a little bit about the way it stacks but just a brief summary.

Are you saying a program doesnt exist out there that goes from the data link to the 7th layer of application? By internet layer are you talking about the network layer? Sorry if it doesnt make sense just trying to get some hands on experience so i can see it on a hands on exersize so i can understand it a bit better

EDIT: And by go from the data link to application i dont mean dirrectly to it i mean from data link to network, transport, session, presentation then application just to clearify.

Ok once again I'd like to say that im a student and currently in my network+ class, I could probably look this info up myself eventually wasting between 1-3 hours of study time but since you guys were so helpful with my last post about the command prompt I figured I'd ask you guys again.

Ok here the thing I want to know how to connect to a PC on my network threw the MAC (I got 4 computers on my network so its good hands on practice instead of just book learning). I already got a program that scans all of the IP address and converts them into the MAC address on my network, and it works i've tested it already. So what would I do from here do I use another 3rd party software program or is there a more direct route?

Anyways i'm going back to studying hope somebody can help me.

May you could answer another noobish question, and keep in mind im not looking for a how to guide but more of general understanding.

I've been learning about ports and stuff and know like 15 of the main ports, but i've sorta been wondering how people (mostly hackers i would suppose) gain access threw ports to your computer remotely I know you have to have the port open and they would probably run a port scanner on you or something to see which ones you got going but how do they access it from there (do they use the command prompt or a 3rd party software)?

ah thanks for helping me out very useful . my classes are 5 weeks long and i couldnt afford to wait till tuesday (we got monday off) im constantly studying so i appreciate the timely response 

First off I would like to say that I am still a student and just recently I just started learning how to use the cmd prompt and I hope nobody get mad at me for asking such a simple question.

I'm looking at PING, when I do PING <IP address> why does the same exact thing show as PING -a, <IP address>? I know -a is to resolve addresses to host names but im a little confused as to what that really means and why it would look like a normal PING.

Also I'd like to know what would be a point of a continuous ping using -t unless its an form of attack on a workstation. (And what would be the syntx to stop it the help file in my cmd promt says "to stop type control-c" would i type PING -c <ip address>?