Computer Networking
What does a switch do when a frame is received on an interface and the destination hardware address is unknown or not in the filter table?

Sends back a message to the originating station asking for a name resolution
Drops the frame
Floods the network with the frame looking for the device
Forwards the switch to the first available link

ANSWER DOWNLOAD EXAMIANS APP

Computer Networking
X.21 is

network access standard for connecting stations to a circuit-switched network
a method of determining which device has access to the transmission medium at any time
a very common bit-oriented data link protocol issued by ISO
None of these
a method access control technique for multiple-access transmission media

ANSWER DOWNLOAD EXAMIANS APP