c$)(1$ pts$)$ Suppose a router between party A and party B is under the control of a hostile entity. As A sends packets to $B,$ the hostile router can launch a DoS attack by replicating and sending numerous copies of each packet from A to B$.$ This essentially forms a replay attack. Propose a countermeasure that can be implemented to safeguard B$\text{'}$s computer against this DoS replay attack. Please also explain how your proposed countermeasure protects against the attack.