单项选择题
A. the router generates a certificate request and forwards it tothe CA
B. the router generates an RSA key pair
C. the router sends its public key to the CA
D. the CA sends its public key to the router
E. the CA verifies the identity of the router
F. the CA generates a certificate request and forwards it to the router
多项选择题 Whichtwostatementsarecorrectabouttheaaaauthenticationlogindefaultgrouptacacs+localglobalconfiguration command？（）
单项选择题 WhichCiscosecuritysoftwareproductmitigatesDayZeroattacksondesktopsandservers-stoppingknown andunknownattackswithoutrequiringreconfigurationsorupdatesontheendpoints？（）
多项选择题 TACACS+authenticationuseswhichthreepackettypes？（）