Final answer:
Slashdotted refers to a temporary website crash caused by sudden traffic influx; flash crowd is a sudden increase in legitimate traffic.
Step-by-step explanation:
The terms 'slashdotted' and 'flash crowd' refer to instances of legitimate network overload. Slashdotted specifically refers to a temporary website crash caused by a sudden influx of traffic from a popular website, typically due to a link being shared or featured on a high-traffic website. On the other hand, a flash crowd is a sudden increase in legitimate traffic to a website or online service, often caused by an event or viral content.
The relationship between these instances of network overload and the consequences of a Denial of Service (DoS) attack is that both can result in the unavailability or degradation of a website or online service. However, the key difference is that slashdotting and flash crowds are unintentional and caused by legitimate user activity, whereas a DoS attack is a deliberate attempt to overload a network, typically by flooding it with traffic or exploiting vulnerabilities.