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Which of the following can support many concurrent B-channel links and one 64 Kbps Dchannel?

A. ISDN Basic Rate Interface (BRI)

B. ISDN Primary Rate Interface (PRI)

C. Point-to-Point circuit (PPP)

D. ISDN NRZ encoding

You can do it
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  28. Which of the following protocol resolves a host's hardware address for a known IP address?
  29. What is attenuation?
  30. Which of the following is the port used by SMTP?