. C-connected,s-static,I-IGRP,R-RIP,M-Mobile,B-BGP D-EIGRP,EIGRP external, O-OSPF,IA-OSPF inter area, EI-OSPF external type 1,E2-OSPF external type 2, E-EGP, i-IS-IS,L1-IS-IS level-1,L2-IS-IS level-2,*-candidate default,. handshake required during authentication. Answer: C Explanation: We see that CHAP authentication is used. CHAP use three-way handshaking. We can also see the three-way handshake if we examine. location and filename as the flash-url argument. Reference: Cisco, Loading and Maintaining System Images B: This is not a valid command. C: This is not a valid command. D: This is not a valid...