Which of the Following Layer 1 WAN Technologies Is Not

question 16

Multiple Choice

Which of the following Layer 1 WAN technologies is not normally used as last mile service, but rather traverses multiple ISP networks, connecting these networks to the Internet backbone?

• A) SONET (Synchronous Optical Network)
• B) T-carrier (T1s, fractional T1s, and T3s)
• C) Carrier-Ethernet Transport (CET)
• D) digital subscriber line (DSL)

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