Larry is an IT consultant who works for corporations and government agencies. Larry plans on shutting down the city's network using BGP devices and zombies? What type of Penetration Testing is Larry…

While BGP devices are routers, 'Router Penetration Testing' is too specific; the ultimate goal described is network unavailability, which is DoS.

Utilizing 'BGP devices' (implying BGP manipulation to disrupt routing) and 'zombies' (compromised computers forming a botnet) to 'shut down the city's network' are classic methods associated with Denial of Service (DoS) attacks. Therefore, if performed as a penetration test, it falls under DoS Penetration Testing, which assesses an organization's resilience against such attacks.

'Internal Penetration Testing' assesses threats from inside the network; while parts of the attack might originate internally, the overall goal and methods (BGP manipulation, zombies) point more broadly to DoS.

'Firewall Penetration Testing' focuses on the security of firewalls, which is a component, but not the overarching goal described, which is network shutdown.