Mark works as a Network Administrator for NetTech Inc. He wants to connect the company's headquarter and its regional offices using a WAN technology. For this, he uses packet-switched connection…

Question

Options

• AISDN
• BX.25
• CFrame Relay
• DLeased line

• A
  3% (1)
• B
  90% (26)
• D
  7% (2)

Explanation

X.25 and Frame Relay are both packet-switched WAN technologies, meaning they break data into packets that share the same network infrastructure using virtual circuits - exactly what Mark needs to interconnect multiple offices efficiently over a shared carrier network.

Why the distractors are wrong:

• ISDN (A) is a circuit-switched technology - it establishes a dedicated end-to-end circuit for each connection, similar to a traditional phone call, rather than sharing bandwidth via packets.
• Leased Line (D) is a dedicated point-to-point circuit - it provides a permanent, private connection between two locations with fixed bandwidth, making it circuit-based, not packet-switched.

Memory tip: Associate "F"rame Relay and "X"press packets (X.25) with packet switching - both use the letter forms that suggest "flexible" shared paths. Circuit-switched technologies (ISDN, leased lines) think of as "reserved seats on a train," while packet-switched (X.25, Frame Relay) are "shared roads where multiple cars travel simultaneously."

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