For typical Ethernet sure. Although there are newer standards that can use a single pair (1000Base-T1). They are very range-limited though and not what you woul

For typical Ethernet sure. Although there are newer standards that can use a single pair (1000Base-T1). They are very range-limited though and not what you would normally install in your house. https://en.wikipedia.org/wiki/Gigabit_Ethernet#1000BASE-T1 https://en.wikipedia.org/wiki/Gigabit_Ethernet#1000BASE-T1