It has been determined that there are flaws in the router's layer 2 protocol. If you change the subnet of the router's serial interface, why does ICMP request still work?

What security holes have been found in the layer 2 protocol used by routers? After changing the subnet of the serial interface, why does an ICMP request in a PPP-encapsulated router still function?

The router's layer 2 protocol has been discovered to have what problems? How may this finding be applied? When the subnet of the serial interface is changed on a PPP-encapsulated router, why does the ICMP request still function?

What flaws have been found in the routers' layer 2 protocol? When the subnet of the serial interface is changed on a router that uses PPP encapsulation, why does the ICMP request still work?

What security holes have been discovered in routers' layer 2 protocol? With a PPP-encapsulated router, why does the subnet of the serial interface change even while the ICMP request still functions?

Router layer-2 protocol flaws? Why does a PPP-encapsulation router's serial interface subnet not affect ICMP requests?

What weaknesses in the router layer 2 protocol may be found? Why, even after changing the serial router interface subnet, does a PPP encapsulated router still transmit ICMP requests?

What layer 2 protocol issues have been found on the router? What effects does this discovery have? Why does the serial interface subnet change and the ICMP request still function in a PPP encapsulation router?

What security holes have been found in the layer 2 protocol used by routers? After changing the subnet of the router's serial interface, why does the ICMP request still operate in the PPP-encapsulated router?