[cisco-voip] A little Fun

Mon Oct 8 12:38:54 EDT 2007

Personally I try to stay away from engineers specific configuration
questions because being able to answer those questions doesn't speak to
their overall networking knowledge but rather their configuration
experience.  You can teach anyone to configure a router or switch.  You
can't teach them how IP operates.

Anyway here are some basic questions I ask mid-level people I interview.

1. What is the purpose of ARP?

2. How does traceroute operate?

3. If you did a ping test and the response you received was "TTL expired
in transit" what does that most likely indicate?

4. Why is UDP used for multimedia services rather than TCP?  

5. What does IGMP do?  What does PIM do?  Extra credit for being able to
differentiate between sparse and dense.

Don't ask questions that are specific to your environment since the
prospective employee doesn't know your environment.  And don't try to
catch the interviewee on gotchas.  The purpose of the test is to get an
idea of how good the engineer is, not make him or her feel dumb because
they forgot some relatively minor point.  Also broader questions allow
the interviewee to speak so you can get a better idea of their technical
communications skills.

-----Original Message-----
From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Syed Khalid Ali
Sent: Sunday, October 07, 2007 10:05 PM
To: ryan speed
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] A little Fun

hi,
 here r a few:

what is unicast, broadcast and multicast
how a switch learns a mac address
what does snap do at osi layer 2
what is mdix
difference between routing and switching
how to bridging avoid loop in switched network
how to avoid loop in distance vector protocols
types of routing protocols
what protocol and port number does bgp uses.
what types of area does ospf support
different between types of lsa in ospf
why need redistribution
why need route summarization
what is cidr
why do we need hierachy in ospf or is-is. can we do so in eigrp as well.
is is-is independent of ip protocol. if yes what is the advantage
what does a pasive interface do
difference between ccm, ccm business edition and ccme
what voice signaling protocol does ccm use
in how many ways we can implement call control (centralized or
distributed) 
in a  voice enabled network
when to use mgcp/h323 and sip
what voip signaling protocol does ccm use
how to calculate bandwidth for viop enabled network
difference between the call control methods.
what is the recomended anti virus for ccm
why need a sperate voice vlan
what is the qos value for voice and voice control traffic
what is difference between congestion management and avoidance
techniques available in cisco ios to do congestion management and
avoidance 
(eg: fair queue,cwfq, llq, red and wred)
what is 802.1p
phone get the ip and vlan but unable to register with ccme/ccm  why?
what is v3 vpn
what are the phases in establishing a vpn.
why is the difference between site-to-site and access vpn.
what is the command to see vpn peers
why use gre tunnels with ipsec vpns?

----- Original Message ----- 
From: "ryan speed" <rspeed at gmail.com>
To: <cisco-voip at puck.nether.net>
Sent: Saturday, October 06, 2007 3:08 AM
Subject: Re: [cisco-voip] A little Fun

> never hurts to throw a scenario or two in.
>
> you're tasked with upgrading the ios (pre-definined) on a voice
> gateway for a remote customer, what steps would you take and what
> precautions would you deem necessary for a trouble free upgrade with a
> solid backout plan in the event something goes wrong.
>
> take that answer and move onto another scenario (which if they
> answered the first one correctly should result in a pass or fail
> situation)
>
> you've upgraded to the new ios and rebooted the router, 30 minutes
> have passed and you're unable to reach the router, how will you
> proceed to troubleshoot/rectify the situation so the customer isn't
> stuck with a dead router with 12 hours till business opens again.
>
> On 10/5/07, Kevin Dunn <cheesevoice at gmail.com> wrote:
>> Thought you guys might want to take a break and help me out on a 
>> "related"
>> issue...
>>
>> We are interviewing new Network Engineer Applicants next week.
>>
>> While I was writing up my list of questions (the boss needs 10) I
thought 
>> I
>> would throw this out to you guys.
>> If you could write an interview question for your next Network
Engineer
>> (let's say Professional Level certification in Networking, Security
or
>> Voice)
>> what would you ask them?  (try to keep it technical, nothing about 
>> Packer's
>> tickets or Beer...lol)
>>
>>
>> _______________________________________________
>> cisco-voip mailing list
>> cisco-voip at puck.nether.net
>> https://puck.nether.net/mailman/listinfo/cisco-voip
>>
> _______________________________________________
> cisco-voip mailing list
> cisco-voip at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
> 

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