שאלה | What is a key difference between application layer and network layer security protocols?

What is a key difference between application layer and network layer security protocols?

		Application layer protocols are transparent to the application, while network layer protocols are not
		Network layer protocols always require updating the application
		Network layer protocols can protect against attacks at the transport layer, such as SYN attacks, while application layer protocols cannot
		Application layer protocols affect firewall screening, while network layer protocols do not