1) In Kerberos security protocol, which mainly applied in domain server, the users given ticket to allow him to access the network resources and services that domain have. This is practical idea of single sign on, that is user need to authenticated once then he/she will not be asked to be authenticated later. Based on Kerberos security protocol used in IMAM University answer the next questions: A. What is the algorithm used in encryption between client and server? B. Under your username, what time you have grant the TGT? And when it will be expired? C. What is the name of Key Distributed Center (KDC) which act as Trusted Third party (TTP)? D. What is the public key for imam domain server? (Note: certificate)