Cabling

Mikdilly

What kind of network cabling should be run between 2 buildings if there are voltage differences between the 2 buildings?
Also, if you ping host 2 that is two hops away from the host 1, what ip address and mac address will be reported back to host 1?

Paul Boz

What do you mean voltage differences? The only thing that voltage should affect is power, not what type of network cabling. How much bandwidth do you need? What type of network is it? Ethernet's range is 100 meters, so if you have to stretch it further you may want to use a repeater or a bridge. If they're exponentially far apart you may have to look into involving a service provider, so that you can utilize a WAN connection.

if you ping host 2 that is two hops away from the host 1, what ip address and mac address will be reported back to host 1?

When you send an ICMP request such as a ping or traceroute, once the packet reaches its destination it dies and the recipient creates a new one as a response. As a result, the destination IP address on the reply would be that of router 1, since that's where the ICMP reply needs to go. The MAC address used will be that of whatever intermediary device is between R2 and R1.

Mikdilly

This was an exam question, i don't remember the exact wording, just that it concerned 2 buildings with different voltages. Two of the possible answers i remember were coaxial and fiber optic. I think i chose fiber optic as it wouldn't be effected by any type of voltage.
Thanks for the explanation on the ping.

keenon

What kind of network cabling should be run between 2 buildings if there are voltage differences between the 2 buildings?

to answer question 1 i would look at fiber as it isn't affected by voltage/electricity and there seems to be some distance to be dealt with not to mention it being weather rated casing.

Paul Boz

Mikdilly wrote:

This was an exam question, i don't remember the exact wording, just that it concerned 2 buildings with different voltages. Two of the possible answers i remember were coaxial and fiber optic. I think i chose fiber optic as it wouldn't be effected by any type of voltage.
Thanks for the explanation on the ping.

I'm still failing to see how voltage is an issue, because even if there's some sort of attenuation problem, a repeater or using shielded cabling should fix it. Fiber is expensive!

Either way, out of the choices, fiber is the correct one since it's optical, rather than electrical.

dredlord

wouldn't voltage differences only effect the ammount of power that is available to your networking devices such as routers etc...

Unless im very much mistaken cables are standardised as are the voltage levels on them thus this question should be answered based on distance, posibility of electro magnetic interference and bandwidth required.

In my oppinion fiber optic cable is your safest bet, huge bandwidth and large distance and eimne to electro magnetic interference

dtlokee

We have tis problem from time to time with the fact that the electrical services between two buildings can have different grounding points and are not bonded (connected together with a wire). What will happen when you string your UTP between the buildings is the voltage differental will be conducted through the UTP cable and can cause high error rates or possibly burn out the switchport. Since fiber optic cable does not conduct electricity it is the better choice when dealing with this voltage differential.

HTH