Cisco WAN architecture design guide, modern conference room, large wooden table, ergonomic chairs, Cisco routers and switches on display, multiple screens showing network diagrams, 3D models of data centers, whiteboard with technical notes, professional attire, male IT engineer, 30-40 years old, short hair, glasses, laptop open, cup of coffee nearby, natural light pouring in through large windows, cityscape outside, softbox lighting, shallow depth of field, realistic rendering.