1. Kerberos provides a centralized authentication server to authenticate users to servers and servers to users. In version 5, Kerberos can be used in multiple realms. Describe the THREE (3) requirements for multiple Kerberi.

2. With the aid of a diagram describe the SIX (6) steps of centralized authentication process using Radius server.

3. The network engineer at Global College of Engineering and Technology has successfully created a VLANs 10 and 20. Members of VLANs are two switches which uplinked to each other using fastEthernet 0/5 interface in each individual switch. Below are the commands used to configure switches and add the ports on three different offices named 1 and 2. The network engineer try to test connectivity between two switches for added interfaces, but he got no reply. Rewrite below commands based on information given above to ensure switches are correctly configured.

Office 1 Switch

S1(config)#interface fastEthernet 0/1

S1(config-if)#switchport access vlan 10

S1(config-if)#interface fastEthernet 0/2

S1(config-if)#switchport access vlan 20

Office 2 Switch

S2(config)#interface fastEthernet 0/1

S2(config-if)#switchport access vlan 10

S2(config-if)#interface fastEthernet 0/2

S2(config-if)#switchport access vlan 20