Kerberos is the primary system used for authorization and authentication in Windows Domains. The key distribution center and the ticket$-$granding server are often single points of failure making the system susceptible to outages. What types of attacks does the system protect against?

a$,$eavesdropping and replay

b$,$social engineering

c$,$man$-$in$-$the$-$middle and brute force

d$,$ping of death