The guarantees offered by conventional servers may be violated as a result of:
i) Physical damage to the host;
ii) Errors or inconsistencies introduced by system administrators or their managers;
iii) Successful attacks on the security of the system software;
iv) Hardware or software errors.
Give two examples of possible incidents for each type of violation. Which of them could be described as a breach of trust or a criminal act? Would they be breaches of trust if they occurred on a personal computer that was contributing some resources to a peer-to peer service? Why is this relevant for peer-to-peer systems?