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T1 lines: A. do not provide guaranteed service levels, but simply "best effort." B. have up to twenty-four 64Kbps channels. C. operate over coaxial lines to deliver Internet access. D. are high-speed, leased data lines providing guaranteed service levels. E. operate over existing telephone lines to carry voice, data, and video.

Respuesta :

Answer: D. are high-speed, leased data lines providing guaranteed service levels.

Explanation:

T1 line is simply referred to as a communications transmission service which makes use of copper wires that are twisted in order to transmit and also receive voice traffic.

It should be noted that T1 lines helps businesses with regards to data connectivity. Therefore, they're are high-speed, leased data lines providing guaranteed service levels.

The correct option is D.

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