Blockchain Network Attacks and Defense

Blockchain networks face various attacks, including 51% attacks, DDoS attacks, and Sybil attacks. A 51% attack involves controlling a majority of the network's computing power to manipulate transactions. DDoS attacks aim to overwhelm the network with traffic, disrupting its functionality. Sybil attacks attempt to control the network by creating multiple fake identities. Defending against these attacks requires robust network monitoring, efficient consensus algorithms, and regular updates to address vulnerabilities.