Re: job screening question

2012-07-12 Thread Dennis
On Thu, Jul 5, 2012 at 10:02 AM, William Herrin b...@herrin.us wrote: Hi folks, I gave my HR folks a screening question to ask candidates for an IP expert position. I've gotten some unexpected answers, so I want to do a sanity check and make sure I'm not asking something unreasonable. And

Re: job screening question

2012-07-11 Thread David Barak
(please excuse the top post) If you want a great analysis of how this happened before, check out Clanchy#39;s book _From memory to written record_ about the implications of the spread of literacy as a technology in England in the 1300s. David Barak

Re: job screening question

2012-07-10 Thread goemon
On Mon, 9 Jul 2012, Jeroen van Aart wrote: William Herrin wrote: This is, incidentally, is a detail I'd love for one of the candidates to offer in response to that question. Bonus points if you discuss MSS clamping and RFC 4821. The less precise answer, path MTU discovery breaks, is just fine.

Re: job screening question

2012-07-10 Thread Bret Clark
On 07/10/2012 03:32 AM, goe...@anime.net wrote: On Mon, 9 Jul 2012, Jeroen van Aart wrote: William Herrin wrote: This is, incidentally, is a detail I'd love for one of the candidates to offer in response to that question. Bonus points if you discuss MSS clamping and RFC 4821. The less precise

Re: job screening question

2012-07-10 Thread David Coulson
On 7/10/12 6:56 AM, Bret Clark wrote: Hence the reason he mentioned skilled person... Right. A skilled person knows not to commit to anything in a meeting, or to at least validate what they think before they open their mouth. Depends on the audience, of course. At least in my

Re: job screening question

2012-07-10 Thread Bjørn Mork
David Coulson da...@davidcoulson.net writes: Anyone else noticed their memory has gotten worse since Google came along? :) Huh? Hasn't Google always been there? Bjørn

Re: job screening question

2012-07-10 Thread Andriy Bilous
I think Ivan covered that http://blog.ioshints.info/2012/03/knowledge-and-complexity.html And also about hiring in general http://blog.ioshints.info/2009/12/certifications-and-hiring-process.html Many says that everything happens in the first 5 minutes of interview, right chemistry if you like -

Re: job screening question

2012-07-10 Thread Michael Thomas
On 07/10/2012 03:56 AM, Bret Clark wrote: On 07/10/2012 03:32 AM, goe...@anime.net wrote: On Mon, 9 Jul 2012, Jeroen van Aart wrote: William Herrin wrote: This is, incidentally, is a detail I'd love for one of the candidates to offer in response to that question. Bonus points if you discuss

Re: job screening question

2012-07-09 Thread Mike Andrews
On Fri, Jul 06, 2012 at 09:36:47PM -0400, William Herrin wrote: On Fri, Jul 6, 2012 at 9:22 PM, Steven Noble sno...@sonn.com wrote: I have talked to companies who have job openings many months old for people who absolutely exist in the silicon valley. The hiring company just thinks the

Re: job screening question

2012-07-09 Thread Mike
On 12-07-09 12:57 PM, Mike Andrews wrote: Unless you have a policy that Slot A only does Slot A work stuffed up some orifice. I've been there, and it is both stultifying and limiting. Further to the above wisdom, if you truly care about your work it will either drive you crazy as you force

Re: job screening question

2012-07-09 Thread Jeroen van Aart
William Herrin wrote: This is, incidentally, is a detail I'd love for one of the candidates to offer in response to that question. Bonus points if you discuss MSS clamping and RFC 4821. The less precise answer, path MTU discovery breaks, is just fine. I would say that the ability to quickly

Re: job screening question

2012-07-08 Thread Robert Bonomi
From nanog-bounces+bonomi=mail.r-bonomi@nanog.org Sat Jul 7 23:11:09 2012 Date: Sat, 7 Jul 2012 23:09:54 -0500 Subject: Re: job screening question From: Jimmy Hess mysi...@gmail.com To: Keith Medcalf kmedc...@dessus.com Cc: nanog@nanog.org nanog@nanog.org On 7/7/12, Keith Medcalf

Re: job screening question

2012-07-08 Thread Mattias Ahnberg
On 2012-07-08 00:58, Jimmy Hess wrote: What's the problem with using 255.255.255.247 as a subnet mask if you want to make a LAN subnet with 12 hosts? (5 word answer) I don't much appreciate these types of questions where you expect an exact answer based on your own phrasing/ideas. If running

Re: job screening question

2012-07-08 Thread Matthew Kaufman
On Jul 7, 2012, at 6:03 PM, Randy randy_94...@yahoo.com wrote: snip When a number received in an IP packet is presented in network byte order, and the host architecture is big endian, what must be done to convert the number into host byte order? (one word answer) My response

Re: job screening question

2012-07-08 Thread Jimmy Hess
On 7/8/12, Matthew Kaufman matt...@matthew.at wrote: On Jul 7, 2012, at 6:03 PM, Randy randy_94...@yahoo.com wrote: My response would be: Discontiguous subnet masks were allowed in the pre-CIDR era. If you so desire, give me about 2 hours since I do not have See, I would advocate using the

Re: job screening question

2012-07-08 Thread William McCall
On Sun, Jul 8, 2012 at 2:23 PM, Jimmy Hess mysi...@gmail.com wrote: I'm not sure which era exactly in which you consider it legal and kosher to assign to a network, but even if you relax all the rules that require contiguity, it is still an illegal network mask for end hosts, just like

Re: job screening question

2012-07-08 Thread Michael Painter
Mattias Ahnberg wrote: Its benefical to build a team of clued people with the right personality, interest and mentality to what they do rather than seek people who has taught themselves how to answer certification tests in a way they know the creator of the test expects them. :) Just came

Re: job screening question

2012-07-08 Thread Tyler Haske
Cheaper then a college degree and doesn't require you to 'know the right person.' Technical Terms of Computer Science #515: Certification: A business model that compresses hot air to paper, then trades it for currency.

Re: job screening question

2012-07-07 Thread JC Dill
On 06/07/12 9:06 PM, Matthew Palmer wrote: Maybe it's more significant to ask what the difference between TCP and UDP is. Yes, the difference between TCP and UDP is a much better question to ask, but having HR assess and act on the answer to the question is a whole hell of a lot harder. The

Re: job screening question

2012-07-07 Thread Matthew Palmer
On Sat, Jul 07, 2012 at 11:01:29AM -0700, JC Dill wrote: On 06/07/12 9:06 PM, Matthew Palmer wrote: Maybe it's more significant to ask what the difference between TCP and UDP is. Yes, the difference between TCP and UDP is a much better question to ask, but having HR assess and act on the

Re: job screening question

2012-07-07 Thread George Herbert
On Jul 7, 2012, at 11:13 AM, Matthew Palmer mpal...@hezmatt.org wrote: On Sat, Jul 07, 2012 at 11:01:29AM -0700, JC Dill wrote: On 06/07/12 9:06 PM, Matthew Palmer wrote: Maybe it's more significant to ask what the difference between TCP and UDP is. Yes, the difference between TCP and UDP

Re: job screening question

2012-07-07 Thread William Herrin
On Sat, Jul 7, 2012 at 2:13 PM, Matthew Palmer mpal...@hezmatt.org wrote: * If you're going to have to carefully examine each candidate's answers *anyway*, why not just get on the phone screen with them in the first place, and get HR out of the picture? At least that way you're not

Re: job screening question

2012-07-07 Thread Jimmy Hess
On 7/7/12, Matthew Palmer mpal...@hezmatt.org wrote: * We've already had mention made in this thread of the problems associated with HR attempting to record, verbatim, an answer provided by a candidate. [snip] Conversation should be recorded, then they don't have to write out the full text

RE: job screening question

2012-07-07 Thread Keith Medcalf
What's the problem with using 255.255.255.247 as a subnet mask if you want to make a LAN subnet with 12 hosts? (5 word answer) Unemployment Office Is That Way - Is the only 5 word answer I could come up with. The correct answer invalid netmask, is only two words. What TCP destination port

Re: job screening question

2012-07-07 Thread Randy
snip When a number received in an IP packet is presented in network byte order,  and the host architecture is big endian, what must be done to convert the number into host byte order? (one word answer) My response would be to have a field-day with HR talking about MSB and LSB.

Re: job screening question

2012-07-07 Thread valdis . kletnieks
On Sat, 07 Jul 2012 18:03:43 -0700, Randy said: What's the problem with using 255.255.255.247 as a subnet mask if you want to make a LAN subnet with 12 hosts? (5 word answer) I'm not sure if that's a typo or excessive evil on the part of the questioner. ;) My response would be:

RE: job screening question

2012-07-07 Thread Keith Medcalf
What's the problem with using 255.255.255.247 as a subnet mask if you want to make a LAN subnet with 12 hosts? (5 word answer) My response would be: Discontiguous subnet masks were allowed in the pre-CIDR era. If you so desire, give me about 2 hours since I do not have a scientific

Re: job screening question

2012-07-07 Thread NIG NOG
, they get enormous. Please don’t tease him about it, okay?” She looked to her roommates for their agreement. From: Keith Medcalf kmedc...@dessus.com To: nanog@nanog.org nanog@nanog.org Sent: Saturday, July 7, 2012 6:26 PM Subject: RE: job screening question

Re: job screening question

2012-07-07 Thread Jon Lewis
On Sat, 7 Jul 2012 valdis.kletni...@vt.edu wrote: On Sat, 07 Jul 2012 18:03:43 -0700, Randy said: What's the problem with using 255.255.255.247 as a subnet mask if you want to make a LAN subnet with 12 hosts? (5 word answer) I'm not sure if that's a typo or excessive evil on the part of the

Re: job screening question

2012-07-07 Thread NIG NOG
, and no other voices echoing against the tiles. From: Jon Lewis jle...@lewis.org To: valdis.kletni...@vt.edu Cc: nanog@nanog.org Sent: Saturday, July 7, 2012 6:34 PM Subject: Re: job screening question On Sat, 7 Jul 2012 valdis.kletni...@vt.edu wrote

Re: job screening question

2012-07-07 Thread Owen DeLong
On Jul 7, 2012, at 5:44 PM, Keith Medcalf wrote: What's the problem with using 255.255.255.247 as a subnet mask if you want to make a LAN subnet with 12 hosts? (5 word answer) Unemployment Office Is That Way - Is the only 5 word answer I could come up with. The correct answer invalid

FW: job screening question

2012-07-07 Thread Keith Medcalf
(now copied to list as well) On Sat 07 July, 2012 at 20:32, Owen DeLong wrote: What TCP destination port numbers should be allowed through the perimeter stateful firewall device to and from a mail server whose only purpose is to proxy SMTP mail from internal sources? (one number answer)

Re: job screening question

2012-07-07 Thread Jimmy Hess
On 7/7/12, Keith Medcalf kmedc...@dessus.com wrote: What's the problem with using 255.255.255.247 as a subnet mask if you want to make a LAN subnet with 12 hosts? (5 word answer) Unemployment Office Is That Way - Is the only 5 word answer I could come up with. The correct answer invalid

Re: job screening question

2012-07-06 Thread Matthew Palmer
On Thu, Jul 05, 2012 at 05:01:39PM -0700, Scott Weeks wrote: --- ja...@thebaughers.com wrote: From: Jason Baugher ja...@thebaughers.com Geez, I'd be happy to find someone with a good attitude, a solid work ethic, and the desire and aptitude to learn. :)

Re: job screening question

2012-07-06 Thread Don Gould
Ok, so I read over Williams OP... I have 25 years IT experience... I've applied for a few jobs in my time... I thought to myself I'll have a crack with a few comments!!!... then I read down the next 30 posts and decided that perhaps I didn't really know enough about networking to really

Re: job screening question

2012-07-06 Thread Ray Wong
Ugh, I know someone (thankfully no longer a current colleague) who ardently *defends* his use of questions like what does the -M option to ps do? on the basis that any senior person who knows what they're doing should know all the options to ps!. No, you useless tit, anyone who knows what

Re: job screening question

2012-07-06 Thread joseph . snyder
I agree. Let the person talk do a few probing questions based off what they say. If you yourself have any value you should be able to tell if they have a chance. Also I would prefer someone who says I don't know for sure but maybe something along these lines, and then wants to know the right

Re: job screening question

2012-07-06 Thread Matt Chung
A former manager of mine once told me you can gauge a persons understanding by the questions they ask and I personally agree with this statement. Most of us will be able to make a reasonable assessment of the person by listening to the content of their questions. I'm not looking for an immediate

Re: job screening question

2012-07-06 Thread valdis . kletnieks
On Fri, 06 Jul 2012 17:42:42 +1000, Matthew Palmer said: Ugh, I know someone (thankfully no longer a current colleague) who ardently *defends* his use of questions like what does the -M option to ps do? on Is that an African ps or a European ps? ;) pgprEsHT9Ps02.pgp Description: PGP

Re: job screening question

2012-07-06 Thread Nick Hilliard
On 06/07/2012 16:12, valdis.kletni...@vt.edu wrote: On Fri, 06 Jul 2012 17:42:42 +1000, Matthew Palmer said: Ugh, I know someone (thankfully no longer a current colleague) who ardently *defends* his use of questions like what does the -M option to ps do? on Is that an African ps or a

Re: job screening question

2012-07-06 Thread William Herrin
On Fri, Jul 6, 2012 at 11:50 AM, Nick Hilliard n...@foobar.org wrote: I'll admit that I once asked a question like in an interview, but it was only because the candidate had said that he was an expert with the tar command. If you're going to be that full of poop on a CV, you should expect to

RE: job screening question

2012-07-06 Thread Keith Medcalf
campaign against html e-mail /\ www.asciiribbon.org -Original Message- From: Matt Chung [mailto:itsmemattch...@gmail.com] Sent: Friday, 06 July, 2012 08:20 To: joseph.sny...@gmail.com Cc: nanog@nanog.org Subject: Re: job screening question A former manager of mine once told me you

Re: job screening question

2012-07-06 Thread Owen DeLong
Message- From: Matt Chung [mailto:itsmemattch...@gmail.com] Sent: Friday, 06 July, 2012 08:20 To: joseph.sny...@gmail.com Cc: nanog@nanog.org Subject: Re: job screening question A former manager of mine once told me you can gauge a persons understanding by the questions they ask and I

RE: job screening question

2012-07-06 Thread Keith Medcalf
A client cannot access the website http://xyz.com; How does the user know that it cannot access the web site? When did users become things? Probably a candidate that made this mistake should be dismissed from consideration on that basis alone. How do you know that the client is a person?

RE: job screening question

2012-07-06 Thread Tyler Haske
DNA; Homo Sapien. Smart questions get smart answers. If you want HR to test technical knowledge just make a multiple choice test. (Course then you open a new can of worms). On Jul 6, 2012 3:16 PM, Keith Medcalf kmedc...@dessus.com wrote: A client cannot access the website http://xyz.com;

RE: job screening question

2012-07-06 Thread Eric J Esslinger
, the person at that company with the authority to write checks only worked Mon-Wed From: Owen DeLong [o...@delong.com] Sent: Friday, July 06, 2012 1:53 PM To: Keith Medcalf Cc: nanog@nanog.org Subject: Re: job screening question On Jul 6, 2012, at 11:41 AM, Keith

Re: job screening question

2012-07-06 Thread Scott Weeks
--- d...@bowenvale.co.nz wrote: From: Don Gould d...@bowenvale.co.nz I have 25 years IT experience... I've applied for a few jobs in my time... I thought to myself I'll have a crack with a few comments!!!... then I read down the next 30 posts and decided that perhaps I didn't really know

Re: job screening question

2012-07-06 Thread Owen DeLong
On Jul 6, 2012, at 12:23 PM, Tyler Haske wrote: DNA; Homo Sapien. Smart questions get smart answers. If you want HR to test technical knowledge just make a multiple choice test. (Course then you open a new can of worms). One of my employers did exactly this. I provided the answers I

Re: job screening question

2012-07-06 Thread goemon
On Fri, 6 Jul 2012, Nick Hilliard wrote: On 06/07/2012 16:12, valdis.kletni...@vt.edu wrote: On Fri, 06 Jul 2012 17:42:42 +1000, Matthew Palmer said: Ugh, I know someone (thankfully no longer a current colleague) who ardently *defends* his use of questions like what does the -M option to ps

Re: job screening question

2012-07-06 Thread valdis . kletnieks
On Fri, 06 Jul 2012 15:07:51 -0700, goe...@anime.net said: This is what baffles me. People keep putting stuff on their resume that they simply don't know anything about. TCP/IP expert, yet they don't know SYN/SYNACK/ACK or subnetting. HTTP expert but they don't know what a 200 response is.

Re: job screening question

2012-07-06 Thread jim deleskie
Pascal's wager.. almost :) On Fri, Jul 6, 2012 at 7:25 PM, valdis.kletni...@vt.edu wrote: On Fri, 06 Jul 2012 15:07:51 -0700, goe...@anime.net said: This is what baffles me. People keep putting stuff on their resume that they simply don't know anything about. TCP/IP expert, yet they don't

Re: job screening question

2012-07-06 Thread Nick Hilliard
On 06/07/2012 23:25, valdis.kletni...@vt.edu wrote: The Friday afternoon cynic in me says it's because it's a move with positive paybacks. There's 3 basic possibilities: 1) You send the puffed resume to a company with clue, it gets recognized as puffed, and you don't get the job. Zero

Re: job screening question

2012-07-06 Thread valdis . kletnieks
On Sat, 07 Jul 2012 00:07:57 +0100, Nick Hilliard said: 4) you get caught out in the interview as being puffed up, but the company hires you anyway despite strongly worded objections from the interviewer, causing the interviewer's eyes to spin in their sockets at the inanity of the decision.

Re: job screening question

2012-07-06 Thread George Herbert
On Fri, Jul 6, 2012 at 4:43 PM, Steven Noble sno...@sonn.com wrote: On Jul 6, 2012, at 4:16 PM, George Herbert george.herb...@gmail.com wrote: 6) Puffed it up a little (worked with Cisco routers, but in the 7200 era, and hasn't categorized skills as recent / older), but hasn't outright lied.

Re: job screening question

2012-07-06 Thread Ben Aitchison
On Fri, Jul 06, 2012 at 04:18:21PM +1000, Matthew Palmer wrote: On Thu, Jul 05, 2012 at 05:01:39PM -0700, Scott Weeks wrote: --- ja...@thebaughers.com wrote: From: Jason Baugher ja...@thebaughers.com Geez, I'd be happy to find someone with a good attitude, a solid work ethic,

Re: job screening question

2012-07-06 Thread Steven Noble
On Jul 6, 2012, at 5:04 PM, George Herbert george.herb...@gmail.com wrote: On Fri, Jul 6, 2012 at 4:43 PM, Steven Noble sno...@sonn.com wrote: On Jul 6, 2012, at 4:16 PM, George Herbert george.herb...@gmail.com wrote: 6) Puffed it up a little (worked with Cisco routers, but in the 7200 era,

Re: job screening question

2012-07-06 Thread Jared Mauch
Die proxy arp die. (and that's not German). I've had a job or consulting gig or two that has inadvertently had this as the hidden glue making things work. (wha, you can't route that subnet out an Ethernet interface without a next hop? It's always worked) I fight with sysadmins to this

Re: job screening question

2012-07-06 Thread valdis . kletnieks
On Fri, 06 Jul 2012 17:04:16 -0700, George Herbert said: If people don't bother to clean up the resume, either they don't understand what's relevant now, or they don't care, or they're trying to hide something. OK. I admit it. My resume still lists that I spent a few years hacking assembler

Re: job screening question

2012-07-06 Thread Ben Aitchison
On Fri, Jul 06, 2012 at 09:19:48AM -0500, Matt Chung wrote: A former manager of mine once told me you can gauge a persons understanding by the questions they ask and I personally agree with this statement. Most of us will be able to make a reasonable assessment of the person by listening to

Re: job screening question

2012-07-06 Thread William Herrin
On Fri, Jul 6, 2012 at 9:22 PM, Steven Noble sno...@sonn.com wrote: I have talked to companies who have job openings many months old for people who absolutely exist in the silicon valley. The hiring company just thinks the people who apply are over or under qualified. I thought someone was

Re: job screening question

2012-07-06 Thread William Herrin
On Fri, Jul 6, 2012 at 8:51 PM, Ben Aitchison b...@meh.net.nz wrote: Like when you have a /24 subnet routed to a customer, how many IP addresses can they use? 254? 253? To my thinking - if it's a routed subnet that means the gateway is on a different address, and it'd be prudent to still

Re: job screening question

2012-07-06 Thread Doug Barton
On 07/06/2012 16:16, George Herbert wrote: On Fri, Jul 6, 2012 at 4:07 PM, Nick Hilliard n...@foobar.org wrote: On 06/07/2012 23:25, valdis.kletni...@vt.edu wrote: The Friday afternoon cynic in me says it's because it's a move with positive paybacks. There's 3 basic possibilities: 1) You

Re: job screening question

2012-07-06 Thread Jon Lewis
On Fri, 6 Jul 2012, George Herbert wrote: If people don't bother to clean up the resume, either they don't understand what's relevant now, or they don't care, or they're trying to hide something. Or they want to show they've been doing it long enough that they have experience working with

Re: job screening question

2012-07-06 Thread Matthew Palmer
On Sat, Jul 07, 2012 at 12:51:55PM +1200, Ben Aitchison wrote: On Fri, Jul 06, 2012 at 04:18:21PM +1000, Matthew Palmer wrote: On Thu, Jul 05, 2012 at 05:01:39PM -0700, Scott Weeks wrote: --- ja...@thebaughers.com wrote: From: Jason Baugher ja...@thebaughers.com Geez, I'd be happy

Re: job screening question

2012-07-06 Thread Owen DeLong
On Jul 6, 2012, at 9:06 PM, Matthew Palmer wrote: On Sat, Jul 07, 2012 at 12:51:55PM +1200, Ben Aitchison wrote: On Fri, Jul 06, 2012 at 04:18:21PM +1000, Matthew Palmer wrote: On Thu, Jul 05, 2012 at 05:01:39PM -0700, Scott Weeks wrote: --- ja...@thebaughers.com wrote: From: Jason Baugher

Re: job screening question

2012-07-06 Thread Bryan Irvine
On Sat, Jul 07, 2012 at 02:06:58PM +1000, Matthew Palmer wrote: On Sat, Jul 07, 2012 at 12:51:55PM +1200, Ben Aitchison wrote: On Fri, Jul 06, 2012 at 04:18:21PM +1000, Matthew Palmer wrote: On Thu, Jul 05, 2012 at 05:01:39PM -0700, Scott Weeks wrote: --- ja...@thebaughers.com wrote:

job screening question

2012-07-05 Thread William Herrin
Hi folks, I gave my HR folks a screening question to ask candidates for an IP expert position. I've gotten some unexpected answers, so I want to do a sanity check and make sure I'm not asking something unreasonable. And by unexpected I don't mean naively incorrect answers, I mean

RE: job screening question

2012-07-05 Thread Thomas York
: Thursday, July 05, 2012 1:02 PM To: nanog@nanog.org Subject: job screening question Hi folks, I gave my HR folks a screening question to ask candidates for an IP expert position. I've gotten some unexpected answers, so I want to do a sanity check and make sure I'm not asking something unreasonable

Re: job screening question

2012-07-05 Thread Oliver Garraux
Seems fairly straightforward to me. It'll break path MTU discovery. I would hope someone applying for an IP expert position would know that. Could HR be mangling the question or something? Oliver - Oliver Garraux Check out my blog:

Re: job screening question

2012-07-05 Thread David Coulson
That's a horrible question for a non-technical HR person to pose to a candidate - It's impossible for the candidate to ask clarifying questions to make sure they understand what you are looking for, plus you may have a strong candidate who gets it wrong (for whatever reason), but if they were

Re: job screening question

2012-07-05 Thread Leo Bicknell
In a message written on Thu, Jul 05, 2012 at 01:02:08PM -0400, William Herrin wrote: You implement a firewall on which you block all ICMP packets. What part of the TCP protocol (not IP in general, TCP specifically) malfunctions as a result? My questions for you are: 1. As an expert who

Re: job screening question

2012-07-05 Thread James M Keller
On 7/5/2012 1:11 PM, Oliver Garraux wrote: Seems fairly straightforward to me. It'll break path MTU discovery. I would hope someone applying for an IP expert position would know that. Could HR be mangling the question or something? Oliver - Oliver

Re: job screening question

2012-07-05 Thread Darius Jahandarie
On Thu, Jul 5, 2012 at 1:11 PM, Oliver Garraux oli...@g.garraux.net wrote: Seems fairly straightforward to me.  It'll break path MTU discovery. Since Bill said (not IP in general, TCP specifically), I don't think PMTUD breaking is what he's looking for. I'd venture more along the lines of lack

Re: job screening question

2012-07-05 Thread Nick Olsen
hospital. Nick Olsen Network Operations (855) FLSPEED x106 From: James M Keller jmkel...@houseofzen.org Sent: Thursday, July 05, 2012 1:19 PM To: Oliver Garraux oli...@g.garraux.net, nanog@nanog.org Subject: Re: job screening question On 7/5/2012 1:11

Re: job screening question

2012-07-05 Thread William Herrin
On Thu, Jul 5, 2012 at 1:16 PM, David Coulson da...@davidcoulson.net wrote: That's a horrible question for a non-technical HR person to pose to a candidate - It's impossible for the candidate to ask clarifying questions to make sure they understand what you are looking for, plus you may have a

Re: job screening question

2012-07-05 Thread David Coulson
Bill- So, I'm curious, and others probably are too. What's the most popular 'wrong' answer? :) David On 7/5/12 1:35 PM, William Herrin wrote: On Thu, Jul 5, 2012 at 1:16 PM, David Coulson da...@davidcoulson.net wrote: That's a horrible question for a non-technical HR person to pose to a

Re: job screening question

2012-07-05 Thread George Herbert
On Jul 5, 2012, at 10:20 AM, Darius Jahandarie djahanda...@gmail.com wrote: On Thu, Jul 5, 2012 at 1:11 PM, Oliver Garraux oli...@g.garraux.net wrote: Seems fairly straightforward to me. It'll break path MTU discovery. Since Bill said (not IP in general, TCP specifically), I don't think

Re: job screening question

2012-07-05 Thread William Herrin
On Thu, Jul 5, 2012 at 1:20 PM, Darius Jahandarie djahanda...@gmail.com wrote: On Thu, Jul 5, 2012 at 1:11 PM, Oliver Garraux oli...@g.garraux.net wrote: Seems fairly straightforward to me. It'll break path MTU discovery. Since Bill said (not IP in general, TCP specifically), I don't think

Re: job screening question

2012-07-05 Thread Derek Ivey
This is exactly the issue comcast6.net is currently experiencing :). They seem to be blocking ICMP completely and that is causing my HE IPv6 tunnel to be unable to access their site from a browser. On Jul 5, 2012, at 1:41 PM, William Herrin wrote: On Thu, Jul 5, 2012 at 1:20 PM, Darius

Re: job screening question

2012-07-05 Thread Daniel Roesen
On Thu, Jul 05, 2012 at 01:45:54PM -0400, Derek Ivey wrote: This is exactly the issue comcast6.net is currently experiencing :). They seem to be blocking ICMP completely and that is causing my HE IPv6 tunnel to be unable to access their site from a browser. I've recently came across a

RE: job screening question

2012-07-05 Thread Terry Baranski
On Thu, Jul 5, 2012 at 1:42 PM, William Herrin wrote: No, path MTU discovery is the answer I'm fishing for. The TCP specifically part of the question confused the heck out of me. PMTUD is an IP function in every way as far as I'm concerned. (If you're saying that the way it's actually coded

Re: job screening question

2012-07-05 Thread Ray Soucy
I think if your goal is to see if they know that your shouldn't blindly filter ICMP for IPv6, and you're specifically looking for knowledge of PMTUD, then a better question would be Please list the problems that could occur if all ICMPv6 traffic is blocked between two host systems. Which should

Re: job screening question

2012-07-05 Thread Ray Soucy
He might be thinking of the MMS adjustment as a result of PMTUD, which most people forget about BTW, but I agree: PMTUD isn't about TCP, so tossing TCP in there just makes it a very odd question. On Thu, Jul 5, 2012 at 4:04 PM, Terry Baranski terry.baranski.l...@gmail.com wrote: On Thu, Jul 5,

Re: job screening question

2012-07-05 Thread Derek Andrew
Isn't MTU discovery on IP and not TCP? On Thu, Jul 5, 2012 at 11:11 AM, Oliver Garraux oli...@g.garraux.netwrote: Seems fairly straightforward to me. It'll break path MTU discovery. I would hope someone applying for an IP expert position would know that. Could HR be mangling the question

Re: job screening question

2012-07-05 Thread Scott Weeks
-- Cc: nanog@nanog.org nanog@nanog.org Subject: Re: job screening question Date: Thu, 5 Jul 2012 15:05:01 -0600 Isn't MTU discovery on IP and not TCP? -- https://en.wikipedia.org/wiki/Path_MTU_discovery scott

Re: job screening question

2012-07-05 Thread William Herrin
On Thu, Jul 5, 2012 at 5:05 PM, Derek Andrew derek.and...@usask.ca wrote: You implement a firewall on which you block all ICMP packets. What part of the TCP protocol (not IP in general, TCP specifically) malfunctions as a result? Isn't MTU discovery on IP and not TCP? If you want to

Re: job screening question

2012-07-05 Thread Randy
--- On Thu, 7/5/12, William Herrin b...@herrin.us wrote: From: William Herrin b...@herrin.us Subject: Re: job screening question To: Derek Andrew derek.and...@usask.ca Cc: nanog@nanog.org nanog@nanog.org Date: Thursday, July 5, 2012, 3:18 PM On Thu, Jul 5, 2012 at 5:05 PM, Derek Andrew

Re: job screening question

2012-07-05 Thread Diogo Montagner
This type o question where the candidate can elaborate the answer should be asked by a techinal interviewer. For screening questions (for 1st level filtering), IMO, the questions has to be straight to the point, for example: 1) What is the LSA number for an external route in OSPF? This can have

Re: job screening question

2012-07-05 Thread Scott Weeks
--- diogo.montag...@gmail.com wrote:\ From: Diogo Montagner diogo.montag...@gmail.com For screening questions (for 1st level filtering), IMO, the questions has to be straight to the point, for example: 1) What is the LSA number for an external route in OSPF? This can have two answer: 5 or 7.

Re: job screening question

2012-07-05 Thread Jason Baugher
Geez, I'd be happy to find someone with a good attitude, a solid work ethic, and the desire and aptitude to learn. :) Jason On 7/5/2012 5:18 PM, William Herrin wrote: On Thu, Jul 5, 2012 at 5:05 PM, Derek Andrew derek.and...@usask.ca wrote: You implement a firewall on which you block all

Re: job screening question

2012-07-05 Thread Mike Hale
Something tells me you're suddenly going to find yourself with an influx of correct answers... On Thu, Jul 5, 2012 at 3:18 PM, William Herrin b...@herrin.us wrote: On Thu, Jul 5, 2012 at 5:05 PM, Derek Andrew derek.and...@usask.ca wrote: You implement a firewall on which you block all ICMP

Re: job screening question

2012-07-05 Thread Scott Weeks
--- ja...@thebaughers.com wrote: From: Jason Baugher ja...@thebaughers.com Geez, I'd be happy to find someone with a good attitude, a solid work ethic, and the desire and aptitude to learn. :) --- Yeah, that. But how do you get those folks through the HR

Re: job screening question

2012-07-05 Thread Jon Lewis
He'll have to come up with another weedout question, like what's a /27? I'm constantly amazed/disappointed when we interview candidates for a senior Linux admin job and they just don't know modern networking at all. Even better question, with multiple right answers, how many IPs are in a /32?

Re: job screening question

2012-07-05 Thread Owen DeLong
I would use questions such as the following: 1. How many end-sites can be numbered from a single /32. (Correct answers: IPv4 - 1, IPv6 - 65,536) 2. In what circumstance might you need to use IPSEC to secure OSPF instead of MD5 authentication? 3. How

Re: job screening question

2012-07-05 Thread William Herrin
On Thu, Jul 5, 2012 at 8:22 PM, Owen DeLong o...@delong.com wrote: I would use questions such as the following: 1. How many end-sites can be numbered from a single /32. (Correct answers: IPv4 - 1, IPv6 - 65,536) IPv6 - 16,777,216 to 268,435,456 :p 5. What is the

Re: job screening question

2012-07-05 Thread George Herbert
On Jul 5, 2012, at 5:32 PM, William Herrin b...@herrin.us wrote: 5. What is the reason for the 100m distance limit within an ethernet collision domain? What's an ethernet collision domain? Seriously, when was the last time you dealt with a half duplex ethernet? Last time I built

Re: job screening question

2012-07-05 Thread Scott Weeks
--- b...@herrin.us wrote: From: William Herrin b...@herrin.us 5. What is the reason for the 100m distance limit within an ethernet collision domain? What's an ethernet collision domain? Seriously, when was the last time you dealt with a half duplex ethernet?

Re: job screening question

2012-07-05 Thread Randy
/12, Scott Weeks sur...@mauigateway.com wrote: From: Scott Weeks sur...@mauigateway.com Subject: Re: job screening question To: nanog@nanog.org Date: Thursday, July 5, 2012, 5:50 PM --- b...@herrin.us wrote: From: William Herrin b...@herrin.us 5.      What is the reason for the 100m

Re: job screening question

2012-07-05 Thread William Herrin
On Thu, Jul 5, 2012 at 7:01 PM, Randy randy_94...@yahoo.com wrote: --- On Thu, 7/5/12, William Herrin b...@herrin.us wrote: The less precise answer, path MTU discovery breaks, is just fine. Precisely! and if I understand correctly, a non-techinical person within HR is expected to hear this

Re: job screening question

2012-07-05 Thread valdis . kletnieks
On Thu, 05 Jul 2012 15:05:01 -0600, Derek Andrew said: Isn't MTU discovery on IP and not TCP? AIX actually supported PMTUD for UDP. Not sure if it still does. Yes, it was bizarro even for AIX. No, I'm not aware of any actual UDP applications that were able to do anything useful with this

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