IRQ 14 Hard Disk Controller IRQ 15 Open -Often, if an network card will not function it is due to an IRQ or memory conflict. Attentuation is the degradation of a signal as it travels farther from its origination. Repeaters do not filter packets and will forward broadcasts. Both segments must use the same access method, meaning that you can't connect a token ring segment to an Ethernet segment. Repeaters will connect different cable types.
Bridges create routing tables based on the source address.
If the bridge can't find the source address it will forward the packets to all segments. A router will do everthing that a bridge will do and more. Routers are used in complex networks because they do not pass broadcast traffic. A router will determine the most efficient path for a packet to take and send packets around failed segments. Unroutable protocols can't be fowarded.