How does CAT5 ethernet work?

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Coda2432

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Jun 22, 2016
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So I would like to route a 50FT ethernet cable from my router into my computer through the ceiling. So I was wondering, if I have 100mbs down and 25mbs up would the cat5 cable be able to support those speeds? I'm only asking because some devices say that they're 1000mbs duplex but only perform at 100-300mbs. I would also like to know if I set my QoS to the highest priority, will I get 100mbs down, or is that divided between the 4 ethernet ports? Thank you so much for reading this! (Sorry for being dense)
 
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abailey
Ethernet cable is guaranteed to deliver the speeds it is rated at (as long as it is rated). Cat5 is only rated up to 100Mb/s up to 100 meters. CAT5e is rated at 1000Mb/s up to 100 meters and it is the most commonly used. If I were you I would use CAT5e cable. The 100Mb/s down is not so much divided between the ethernet ports as it is shared between the ethernet ports. If you are the only one using the internet you will get the full speed. QOS can help prioritize traffic some but it usually still involves sharing the bandwidth with other users.
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abailey

abailey

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Mar 23, 2014
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Ethernet cable is guaranteed to deliver the speeds it is rated at (as long as it is rated). Cat5 is only rated up to 100Mb/s up to 100 meters. CAT5e is rated at 1000Mb/s up to 100 meters and it is the most commonly used. If I were you I would use CAT5e cable. The 100Mb/s down is not so much divided between the ethernet ports as it is shared between the ethernet ports. If you are the only one using the internet you will get the full speed. QOS can help prioritize traffic some but it usually still involves sharing the bandwidth with other users.
 
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XistenZ

XistenZ

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Jan 19, 2014
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I just feel some clarification about bytes and bits is in order here, since OP says "mbs" which simply isn't anything.
Cat5e, as abailey says, handles 1000Mb/s. The transfer speed in MB (notice the big B, stands for Byte) would be 125 MB/s. 8 bits = 1 Byte. That could explain the part about the cables only transferring 100-300 when you thought it would be 1000.
 
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