Before the lease expires, on receiving the DHCPREQUEST message, the server verifies the lease information by returning a O a. DHCP Repeat O b. DHCP Acknowledgment OC DHCP Request O d. DHCP Offer Select the one which is not a PAGP channel establishment modes. O a. On O b. Desirable OC. Auto O d. Default This is a secure method of remotely establishing a CLI connection over a network. O a. Console O b. SSH OC. AUX O d. Telnet