It provides the connectivity and path selection between two host systems that may be located on geographically separated networks. | |
It defines how data is formatted for transmission and how access to the physical media is controlled. | |
It establishes, manages, and terminates sessions between two communicating hosts. | |
It segments data from the system of the sending host and reassembles the data into a data stream on the system of the receiving host. |
The switch consults the forwarding table to determine if the packet is routable. | |
The switch consults the forwarding table to determine the best route to a destination. | |
The switch consults the forwarding table to determine if access control permits the packet. | |
The switch consults the forwarding table to determine the output port. |
send ICMP unreachable message to source | |
discard frame | |
flood packet on all ports | |
send gratuitous ARP on all ports and wait for reply before forwarding | |
compare destination IP address against an ACL to determine if it is permitted |