Help with question - cable type

An advantage of using unshielded twisted-pair (UTP) cable for data communication over other copper-based cables is that UTP cable:
A. reduces crosstalk between pairs.
B. provides protection against wiretapping.
C. can be used in long-distance networks.
D. is simple to install.
I think the answer should be D, as the UTP are cheapest ones out there and they are easiest to install as well as compared to any other type of cable. But the correct answer is mentioned as A, how on earth can it reduce craosstalk between pairs. They are most prone to EMI / RFI.
Any thoughts on why it is A and not D?
I think the answer should be D, as the UTP are cheapest ones out there and they are easiest to install as well as compared to any other type of cable. But the correct answer is mentioned as A, how on earth can it reduce craosstalk between pairs. They are most prone to EMI / RFI.
Any thoughts on why it is A and not D?
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With RegardsSumeet Gandhi
CISA, CISM, PMP, PMI-ACP, AWS Certified Solutions Architect, Office 365, SharePoint Online, SharePoint (2016 / 2013 / 2010 / 2007), MCTS, CSM, ITIL, PRINCE2
Comments
Sumeet Gandhi
Sumeet Gandhi
OR
Eli, goes deep into cabling
No, this is not the 1st cert I am giving. This is not CompTIA question (I am not sure if this is part of that). For some reason this should be under CISA and not CISM.
Even in books of CISA or CompTIA (which I have not gone through), it is mentioned that UTP is cheap / easy to install as the biggest advantage. No where it is mentioned that they reduce (or help in reducing the crosstalks). So, I wanted to get an view from the fellow members of this community to understand why the correct answer is correct.
Thanks
Sumeet Gandhi
Sumeet Gandhi
without getting into the physics of interacting electromagnetic fields, I'll just say that the more the pairs are twisted the less crosstalk there is. why is cat 6 cable rated as faster than cat 3? A big factor is the twists/inch of the cable. With cat 6 cable, the pairs have more twists/inch than cat 3. A cat 6 cable has less crosstalk. By using a cat 6 cable a faster signal can go further.
I agree that the question is somewhat vague and both answers could be right. But, when talking about cabling, it is more about the crosstalk. And, therefore, A is the better answer for this question.
Sumeet Gandhi
I do have few more questions that I will post which I would need some more expert advice as they are also bit biased.
Sumeet Gandhi