Short answer is that 'dropped packets' happens when the network is unstable so not all of the information sent out by you is received at the other end. One reason you have 'unreachable host' is the host computer is switched off. There are other reasons but making the network more reliable is the best solution
Use tracert to see where your packets are being dropped.
I wouldn't think there is a statistic for that.
flow control
Packets Words
data packets is a kind of packets of data. a groop of bits that is together in a groop.
Poison reverse is a technique used in computer networking to prevent routing loops in distance-vector routing protocols. It involves advertising a route back to the neighbor it was learned from with an infinite metric to indicate that the route is unreachable. This helps to avoid packets being sent in circles during routing updates.
Output ports can transmit only a single packet in a unit of time (the packet transmission time), the arriving packets will have to queue for transmission over the outgoing link. There could be more packets arriving from the switching fabric at the output port while the output port is still working on sending the packets that are already on the queue. Eventually, the number of queued packets can grow large enough to exhaust the memory space at the output port, in which case packets are dropped or lost.
Giant packets. Runt packets are packets that are too small. Giant packets are too large for the medium.
The packets will be delivered and reassembled at the destination.
Session Layer traced lost Packets.
C. Another user is attempting to log on under your user name. D. Another AP has been added to the network.
.1 packets