Which category has been practically replaced by Cat5e and is used in Ethernet LANs with two twisted pairs?

Which category has been practically replaced by Cat5e and is used in Ethernet LANs with two twisted pairs?

• A. Cat4
• B. Cat5
• C. Cat5e
• D. Cat6

Answer: (A)

Two twisted pairs are used in Fast Ethernet links like 100BASE-TX. Cat5 was the standard for those two-pair networks, but Cat5e added tighter specifications for reducing crosstalk and handling higher frequencies, making it more reliable and capable (including Gigabit Ethernet when four pairs are used). Because of these improvements, Cat5 has been practically replaced by Cat5e in modern installations. Cat4 is an older option tied to four-pair setups like 100BASE-T4 and is not the focus here, and Cat6 is a newer, higher-spec cable for faster networks.

Two twisted pairs are used in Fast Ethernet links like 100BASE-TX. Cat5 was the standard for those two-pair networks, but Cat5e added tighter specifications for reducing crosstalk and handling higher frequencies, making it more reliable and capable (including Gigabit Ethernet when four pairs are used). Because of these improvements, Cat5 has been practically replaced by Cat5e in modern installations. Cat4 is an older option tied to four-pair setups like 100BASE-T4 and is not the focus here, and Cat6 is a newer, higher-spec cable for faster networks.