Where are my IT/Networking peeps?!?

[Raul Duke]

Sounds like he worded the question poorly. If he was saying the /22 was the used and could not be in that sn, then yes the next available would be 145.36.4.1 and .2. I would have given the same answer as you did with the question worded like that.
If I was doing that hire, seeing you give me the info of the sn that was given to you, that would be good enough for me,
You should have asked him if he can do IPv6 calcs.

[Jer]

Sounds like he worded the question poorly. If he was saying the /22 was the used and could not be in that sn, then yes the next available would be 145.36.4.1 and .2. I would have given the same answer as you did with the question worded like that.
If I was doing that hire, seeing you give me the info of the sn that was given to you, that would be good enough for me,
You should have asked him if he can do IPv6 calcs.

But the fact that he uses the word 'assigned' specifically... couldn't that denote that it was indeed in use?? At this point I think it's coming down to semantics which shouldn't really be a determining factor in an interview for an IT position. I think I did enough to demonstrate I knew what I was doing. I should get my facking gold star!

[cfortune]

But the fact that he uses the word 'assigned' specifically... couldn't that denote that it was indeed in use?? At this point I think it's coming down to semantics which shouldn't really be a determining factor in an interview for an IT position. I think I did enough to demonstrate I knew what I was doing. I should get my facking gold star!

Maybe he meant you already have /22 of your /16 class B already used. The more I read the original question, the more it makes me think thats what he was getting at. Very poorly worded if you ask me. Also a very dated question. You should have called him crazy for using a router and not a layer 3 switch.

[Raul Duke]

Like I said, Id give you full points if it was my interview.
To me, as an IT manager, I look for people that can find the answer, not ones that know it all (or think they do).

[Jer]

Maybe he meant you already have /22 of your /16 class B already used. The more I read the original question, the more it makes me think thats what he was getting at. Very poorly worded if you ask me. Also a very dated question. You should have called him crazy for using a router and not a layer 3 switch.

I want to bring it up but I want to make sure I have all my i's dotted and my t's crossed when I question him. Then to decide whether to include him on the clarification or if I keep him out of it and take it directly to the ones in charge of hiring and let them decided if they want to address it with him or not. Hmmm....

Like I said, Id give you full points if it was my interview.
To me, as an IT manager, I look for people that can find the answer, not ones that know it all (or think they do).

That's another thing I told them. I said that I was good at getting the right answer to questions I didn't know for sure using resources like the internet. I'm the first one to say that I don't know everything so I tend to double and triple check my work to various sources. This keeps me out of trouble. Let's face it, there won't ever be a time where I would be in a scenario that this interview put me in... no way to look up the answer or double check my answer to make sure. Kind of unrealistic.

[20X11]

I don't understand how you're given the address space 145.36.0.0/22 and you end up with a first available IP of 145.36.4.1/22

145.36.0.0/22 breaks down as:
Network address: 145.36.0.0/22, granted you don't live in like 1998 or some shit and "ip subnet zero" isn't an option on your Cisco.
Host addresses: 145.36.0.1-145.36.3.254
Broadcast address: 145.36.3.255

145.36.4.1 isn't even a valid address in the address space 145.36.0.0/22.

^^^^This Classless Inter Domain Routing (CIDR)as evidenced by the /22 requires that you break the 4 octets into their respective binary representations and work from the on the 10th binary position from the right (32-22). Since there are only 2 binary positions in the 3rd octet the highest range is xxx.xxx.3.254


EDIT: and technically since this is using CIDR it is NOT a class B address

[DeusExMachina]

145.36.4.0/22 is the next available subnet if 145.36.0.0/22 is used. Maybe that's what he meant by available.

Because I doubt a professor would call a basic subnetting question "very difficult". It is likely purposefully confusing.

[20X11]

145.36.4.0/22 is the next available subnet if 145.36.0.0/22 is used. Maybe that's what he meant by available.

Because I doubt a professor would call a basic subnetting question "very difficult". It is likely purposefully confusing.

145.36.4.0/22 is not a valid CIDR designation....145.36.4.0 lives under 145.36.0.0/21

[20X11]

Damned...I wish I would have been there...I haven't done this shit in 15 years and I could have made that professor look like an idiot. I frakin HATE companies who bring in so called experts for interviews...all they do is blow smoke and obfuscate reality.

[DeusExMachina]

145.36.4.0/22 is not a valid CIDR designation....145.36.4.0 lives under 145.36.0.0/21

145.36.4.0/22 is still a valid subnet, and any network a.b.c.0/22 is a valid CIDR address.