A.copier
B.microwave oven
C.toaster
D.cordless phone
E.IP phone
F.AM radio

A.R1 will forward the packet out all interfaces.
B.R1 will drop this packet because this it is not a valid IP address.
C.As R1 forwards the frame containing this packet, Sw-A will add 192.168.1.255 to its MAC table.
D.R1 will encapsulate the packet in a frame with a destination MAC address of FF-FF-FF-FF-FF-FF
E.As R1 forwards the frame containing this packet, Sw-A will forward it to the device assigned the IP address of 192.168.1.255.

A.Drop the data.
B.Send the data frames to the default gateway.
C.Create an ARP request to get a MAC address for the receiving host.
D.Send a TCP SYN and wait for the SYN ACK with the IP address of the receiving host.

A.10.0.0.0/22 is subnetted，1 subnets D  10.4.0.0[90/20514560] via 10.2.0.2，6w0d，serial0/1
B.10.0.0.0/28 is subnetted，1 subnets D 10.2.0.0[90/20514560] via 10.2.0.2，6w0d，serial0/1
C.10.0.0.0/22 is subnetted，1 subnets D 10.0.0.0[90/20514560] via 10.2.0.2，6w0d，serial0/1
D.10.0.0.0/30 is subnetted，1 subnets D 10.2.2.0[90/20514560] via 10.2.0.2，6w0d，serial0/1
E.10.0.0.0/28 is subnetted，1 subnets D 10.4.4.0[90/20514560] via 10.2.0.2，6w0d，serial0/1
F.10.0.0.0/30 is subnetted，1 subnets D 10.4.4.4[90/20514560] via 10.2.0.2，6w0d，serial0/1

A.mismatched TKIP encryption
B.null SSID
C.cordless phones
D.mismatched SSID
E.metal file cabinets
F.antenna type or direction