4. Addressing technologies - Address Assignment. (10%) (1) What is the purpose of DHCP? Which layer protocol is DHCP? (2) Refer to the diagram below. DHCP relay is enabled in Switch3. Answer the following questions. DHCPDISCOVER Relay Src MAC: Router_MAC_2. Dst MAC Server_MAC Src IP. Router_P_1, dst IP Server_ip SVI (VLAN 11): 192.168.11.1/24 UDP. Src Port 68, Dst Port 67 CIADDR (NULL). YIADDR: (NULL). SIADDR: (NULL). SVI (VLAN 22): 192.168.22.1/24 GIADDR: 77 CHADDR: PC1LMAC Helper IP = ? Switch3 Switch Switch1 DHCPDISCOVER Src MAC: PC1_MAC, dst MAC:FFFF.FFFFFFFF Src IP: 0.0.0.0, dst IP: 255.255.255.255 UDP Sre Port: 88 Dst Port: 87 CIADDR (NULL). YIADDR (NULL), SIADDR: (NULL). GIADDR: (NULL). CHADDR: PC1_MAC PC1 PC2 192.168.99.99/24 VLAN 99 192.168.11.11/24 VLAN 11 192.168.22.22/24 VLAN 22 In the DHCP lease origination, a client begins a four-step process to obtain a lease. What IP address is configured as the helper-address in the Switch3 for VLAN 11? What IP address is used as GIADDR in the DHCPDISCOVER Relay message