Oliver is the network security administrator for Foodies Café, a chain of coffee shops in the Seattle metropolitan area. Oliver is performing his quarterlysecurity audit of the entire company, including each coffee shop the company owns. Each café has a wireless hotspot that customers can utilize. The home office also has a wireless network which is used by employees. While walking aroundthe outside of the corporate office, Oliver sees a drawing on the sidewalk right next to his building.
What does this symbol signify?