Clarification on Network cables

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Hello everyone!

Q) Can anyone tell me what is the correct Maximum Length of the following network cables:-

10BASE-FL

100BASE-FX

The reason why I ask is in one of my N+ study books it shows 10-Base-FL and 100Base-FX to have a max length of 20Kilometres?

In the other it shows it to be 2000 Metres?

The two study books are:-

Network+ Fast Pass


Comptia Network and Complete Self Study Guide


Cheers!

 

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2000 meters per segment is what I have learned whilst studying.

 

Not sure if this helps ya UCM, but check out page 5 : -

http://www.hp.com/rnd/pdfs/100FXtechbrief.pdf

 

According to my copy of IEEE802.3-2002 the segment limit for both is 2000m.

Harry.

 

Thanks for the link Tim

Rep left

 

That's what I thought, so it must be a typo in the Fast book, maybe they meant 2Kilometres

I thought it was odd when I was doing the practise questions and got it wrong for selecting 2000 metres!

 

Thanks Harry

 

I am not sure mate everything I have read says 2000 meters even wikipedia says 2000 meters per segment

 

Dam it - there was another network cable question i wanted to ask but can't remember what classification of the cable was!!! MY Home network Hub has gone down and I'm having to rasie these question while at work!

So bear with me, see if i can remember what the question was:-

It was something the lines define the characteristics of 10-base-T network cable. I put down it has a transmission speed of 10Mbps max with single pulse - therefore on 1 signal on the wire at any given time and t referred to twisted unsheided pair.



Is this right, because in the answer it states the network cable is Sheilded twisted pair?

The 10-base cable is a cat3+ and not a Cat5e+?

 

From my understanding 10 base is CAT3, CAT5 is 100BaseT and cat6 1000BaseT

I dont think 10BAseT isn't sheilded, where are these questions from?

 

From one of the study books fast pass. i noticed there were a lot of cables covered in the self study book, that are not shown on the Comptia N+ objectives list. So although I understand the classification and uses I'm not sure if to include them in the revision notes??

 

I am using the Groth book and the Meyers book for the N+.

It might be worth see if there is an error page for that book in regards to the cable length etc I remember there are few in the A+ AIO 6th edition that I had noticed but they are all corrected on the erata page.

 

Actually GBL it's probably because I'm not in the right frame of mind!

Having just come from a department meeting to be informed my job will be amalgumated with IT Help Desk. Also my job title will be changed from technician to IT Support advisor Also I will be regraded for my salary to IT Help desk advisor as well as the job spec.

They said it shouldn't be seen as a step backward, but more of a new step to being customer focused!

mmmmmmmmmm... i think I will go rest my head on a railway line!

 

Thats crap dude, hopefully they won't cut your wages. Maybe it's time to start looking for a new job.

 

Does the books have a website? If so they may have an "errata" section that would list typos picked up by the readers.

 

Yes.. I think you right :hhhmmm

 

Cheers Wizard

 

It would have to be 2000 meters which is 2km, if it were 20km that would be 200000 meters or something. That would be one very big stable cable

 

Another question, this time on clarification of cat 6?


In one of the study books it shows Cat 6 to have a transmission speed of 1000mbps and yet in another it shows it as cat 6 = 155Mbps and Cat 6e = 10Gbase standard

Which is correct?

I have looked on the net and found most refer to cat 6 as 1000Mbps but it doesn't state if this cat 6 or cat6e?

 

I think this article is fairly clear.

I think part of the problem is that the frequency rating of cables does not match the expected 10, 100, 1000 figures. In the case of 1000Base-T this is because of the use of multi-level signaling, and also the use of *4* pairs in the physical cable.

Note that there is officially no such thing as Cat6e - see here.

Harry.