Which of the following statements about Fixed length subnet mask (FLSM) is false? O a Subnetting is done only one time O b. Subnet mask may be different depending upon requirement of hosts O c. Used when the requirements for the hosts is same O d. Subnet mask is same for all the subnets An administrator has configured the router with the following passwords. Which of the following passwords should the administrator use in order to gain access to the user exec mode? Router(config)-enable password internal Routerconfig)#enable secret external Router config)pline console 0 Router(config-line)#password logical Routerconfig-line login ological e bextemal interna