Man, somewhere between trying to stay organized and clean, work being slightly crazy (without going into too much detail there are lots of people that are extremely resistant to change, the front line guys are not trying to argue with this to save face and im the guy that gets to say you need a new computer and your going to have to work with me to make this happen and no im not going to be a fall guy because you refuse, for some reason, to get a new and better computer), and going to the gym, I haven’t made as much time as I would have liked to for blogging. We did have an interesting security event at work this week though. Someone responded to a phishing email that directed them to a OneNote where they put in AD creds and then it started spamming the entire company with emails. I ended up fixing the machine that had AV that had not been updated in months and the user was not using our two factor for login. Getting our users to understand that two factor and not having ancient devices and that perhaps working with the people trying to make their lives more secure and functional, is possibly a good idea. There is a lot to that statement. Anyway, we now have a 90 day PW policy and everyone had to reset their passwords. The HD was also busy AF answering calls all afternoon. The Win7 upgrades are going great for the stores and they are easy to work with but any one with data to migrate or applications is normally more difficult to work with, for whatever reason. Anyway, lets get into this.
So I saved the questions to a draft instead of emailing them to my self in case I had a little time to work on them, at work. I’m now realizing I can see the answer and the question but if I try to avoid cheating by looking below I should be fine haha. Anyway, my guess was A, the I realized the above comment and I was like ‘nice’ csb
Anyway, what the hell does PVST stand for?
Per-VLAN Spanning Tree (PVST) is a Cisco proprietary Spanning Tree Protocol (STP) which operates a separate instance of Spanning Tree Protocol (STP) for each individual VLAN. A separate instance of Spanning Tree Protocol (STP) for each VLAN helps VLAN to be configured independently and also can perform better.
Nice! Moooooving onnnnn omg whyyyyyy
Honestly, I have no idea at this point and I’m sure I’ll cover more material on this at some point so im not going to stress it and I’ll read the answer
You know, that sounds really complicated but there was the issue of ‘it doesn’t say pick two’ but the two given answers seem logical. The naming convention is a little different. So, System ID extension value, means vlan? ok.
First off I dont know what a BPDU is, so lets find that out. What is BPDU since we have taken away the option to use an HTML editor and dont have a field for ‘URL name’ in the drop down text but you can totally edit the HTML for a few extra clicks, I think I’ll keep it like this. I guess that’s intended functionality for the block editor at this point. Ok, fine ill click over to edit as HTML and update it.
Acronym for bridge protocol data unit. BPDUs are data messages that are exchanged across the switches within an extended LAN that uses a spanning tree protocol topology. BPDU packets contain information on ports, addresses, priorities and costs and ensure that the data ends up where it was intended to go. BPDU messages are exchanged across bridges to detect loops in a networktopology. The loops are then removed by shutting down selected bridge interfaces and placing redundant switch ports in a backup, or blocked, state.
Well, I know have the most basic info but I’m still not sure what the hell it does or contains. Or why.
I’m not going to say that reading that is headache inducing as to the amount of info I don’t quite understand but I will say I have a ways to go with it. Like where does the bridge ID come in with the VLAN id. Like how does it interact with that? Is that the link between routers? The second part about the trunking header used to understand what routers are ‘aware’ of the VLAN makes sense. The part about the 12 bits in the middle will be slightly confusing. TLV is confusing because I assume it means the same as TTL but its Type-Length Value.
The thing is, when you keep reading these things, you start to gain more of an understanding. Like you use a VLAN assignment, which is sort of the same as trunking, on 2 ports. You dont have to do that but it is an option. My guess without looking below is D and it looks like im right.
ok, next question.
Still not sure i understand the ideas but ok
My guess would be C but I wouldnt assume to add additional information to the headers but I would assume it to do ‘costing’ as it where, to determine fastest link and balance traffic
I was right. ok so, now I have to go get my tires rotated since they did not do that last Sunday. I was going to go yesterday but things got busy. Oh, well. Today is better than never though. Anyway, I’ll do at least one more chapter today. Hopefully 2 but who knows what my level of ability to focus will be. Still amazed that when I started into server I was like “I have no idea how people do this while working a full time job” after having worked my way into management at my first tech job with a full college class load that some of which where graduate level classes and was married. I’m an idiot and kind of a workaholic. I would also prefer to be a nice guy and have you work with me as opposed to diametrically decomposing every bit of logic and sense of reality you have by forcing you to realize your simply a narcissistic asshole. Fun and happy and productive is much better but you know, make your choice.