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6) (10 points) TRUE or FALSE: a. A standard analog voice channel (VC) is 8KHz b. Circuit-switched networks provide better quality in terms of delay and delay variation (jitter) c. Analog transmission extends communication links indefinitely d. Ideal digital signals have finite absolute BW e. In general, n-channel FDM requires 1 1 guard bands f. The process of adding extra bits (eg. a header) at a given network layer is called encapsulation g. WDM means "Wave Division & Multiplication" h. Effective BW is generally bigger than the absolute BW i. Human voice produces an infinity absolute BW j. Today's most common computing model is between the strict centralized and the strict distributed paradigms