EST-DATA COMMUNICATIONS REVIEWER

Transmission media are closest to the _______ layer.

• Physical

• Network

• Transport

• Application

Repeaters function in the _______ layer(s).

• Physical

• Data link

• Network

• Physical and Date link

The bridge with the least-cost path between the LAN and the root bridge is called the

_______ bridge.

• Designated

• Forwarding

• Blocking

• Designated and Forwarding

A bridge never forwards frames out of the ______ port.

• Root

• Designated

• Forwarding

• Blocking

In ______ routing, the mask and destination addresses are both 0.0.0.0 in the routing table.

• Next-hop

• Network-specific

• Host-specific

• Default

In data communications, the process of scrambling data to protect the privacy of the

transmitted signal.

• Encryption

• Compression

• Decryption

• Locking

_______ is a multiport bridge that provides a bridging function.

• Repeater

• Hub

• Router

• Switch