Computer Networking
The packets switching concept was first proposed

None of these
in the early 1960s for military communication systems, mainly to handle speech
All of these
in the late 1950s for Defense Ministry of US
in the late 1980s for the Defense Ministry of US.

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Computer Networking
When setting up Frame Relay for point-to-point subinterfaces, which of the following must not be configured?

The local DLCI on each subinterface
The subinterface type as point-to-point
PAP
The Frame Relay encapsulation on the physical interface
An IP address on the physical interface

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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?

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

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