SK0-004 · Question #883
A server administrator is selecting cable for a 10GBASE-T server connection. If the server is 246ft (75m) from the switch, which of the following cable types should the administrator choose?
The correct answer is D. Cat 6a. 10GBASE-T requires Cat 6a cabling to achieve its full 100m distance; lower cable categories cannot support 10Gbps at 75m.
Question
A server administrator is selecting cable for a 10GBASE-T server connection. If the server is 246ft (75m) from the switch, which of the following cable types should the administrator choose?
Options
- ACat 5
- BCat 5e
- CCat 6
- DCat 6a
How the community answered
(34 responses)- A3% (1)
- C3% (1)
- D94% (32)
Why each option
10GBASE-T requires Cat 6a cabling to achieve its full 100m distance; lower cable categories cannot support 10Gbps at 75m.
Cat 5 is rated for a maximum of 100Mbps and does not have the bandwidth to carry 10Gbps signals at any distance.
Cat 5e supports Gigabit Ethernet (1000BASE-T) up to 100m but lacks the 500MHz bandwidth needed to carry 10GBASE-T.
Cat 6 supports 10GBASE-T only up to approximately 55m due to alien crosstalk limitations, making it insufficient for a 75m run.
Cat 6a (Augmented Category 6) operates at 500MHz and is the minimum standard that supports 10GBASE-T at the full specification distance of 100m, making it fully adequate for a 75m run. Cat 6 can carry 10GBASE-T but only up to approximately 55m, so it falls short for this installation. Cat 6a is the correct and only practical choice for 10Gbps at 75m over copper.
Concept tested: 10GBASE-T cable category and distance requirements
Source: https://www.ieee802.org/3/an/
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