Which piece of equipment operates at both the data-link and network layers?

A. Hub

B. Bridge

C. Brouter

D. Router

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
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  26. Which directory service is used in Windows 2000 Server?
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  29. In the symmetric-key method of cryptography, which key is publicly known?
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