A.coordinating VTNs

B.Layer 2 forwarding

C.tracking hosts

D.managing the topology

E.protecting against DDoS attacks

A.The user swipes a key fob, then clicks through an email link.

B.The user enters a user name and password, and then clicks a notification in an authentication app on a mobile device.

C.The user enters a user name and password, and then re-enters the credentials on a second screen.

D.The user enters a PIN into an RSA token, and then enters the displayed RSA key on a login screen.

A.listens to multicast traffic for packet forwarding

B.propagates VLAN information between switches

C.provides DDoS mitigation

D.rate-limits certain traffic

A.multicast address

B.loopback IP address

C.broadcast address

D.virtual IP address

A.ip address 192.168.0.0 255.255.0.0

B.ip address 192.168.0.0 255.255.255.224

C.ip address 192.168.0.0 255.255.254.0

D.ip address 192.168.0.0 255.255.255.128