The type of wireless topology created by two workers directly communicating between their laptops is called IBSS (Independent Basic Service Set).
In this scenario, an IBSS is formed when devices connect directly to each other without the use of an access point or infrastructure. This is commonly known as an ad hoc network.
Here's a brief explanation of the other options for clarity:
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BSS (Basic Service Set) refers to a set of devices that communicate with each other, typically through an access point in infrastructure mode.
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SSID (Service Set Identifier) is the name of a wireless network; it identifies a specific wireless local area network (WLAN).
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ESS (Extended Service Set) consists of multiple BSSs connected together, usually through access points.
Thus, the correct answer is IBSS.