What characteristic of the activity makes Helga think this is a denial-of-service attack?

Helga is a systems administrator. She sees that an attacker from a remote location is sending
invalid packets, trying to monopolize Helga’s network connection so that a denial of service
occurs. What characteristic of the activity makes Helga think this is a denial-of-service attack?

A.
Use of an illicit server

B.
Bandwidth consumption

C.
System slowdown

D.
Hijacking of internal user resources