A.A level 5 password is not set
B.The vty password is missing
C.The console password is missing
D.An ACL is blocking Telnet access

A.172.31.17.4/30
B.172.31.51.16/30
C.172.31.64.0/18
D.172.31.80.0/22
E.172.31.92.0/22
F.172.31.192.0/18

A.Administratively shut down the interfaces.
B.Physically secure the interfaces.
C.Configure a virtual terminal password and login process.
D.Enter an access list and apply it to the terminal interfaces using the access-class command.
E.Create an access list and apply it to the terminal interfaces using the access-group command.

A.DLCI 17 describes the ISDN circuit between R2 and R3.
B.DLCI 17 describes a PVC on R2. It cannot be used on R3 or R1.
C.DLCI 17 is the Layer 2 address used by R2 to describe a PVC to R3.
D.DLCI 17 describes the dial-up circuit from R2 and R3 to the service provider.

A.It checks the configuration register
B.It attempts to boot from a TFTP server
C.It loads the first image file in flash memory
D.It inspects the configuration file in NVRAM for boot instructions