11. The network layer is intended to route packets through the network toward their destination. 12. The ZigBee network layer natively supports both routers to extend communication at the network level. 13. My question is how can this be if they are both at the network layer ? 14. Vulnerabilities exist at network layers , however, that are not visible to a stateful firewall. 15. The first commercial network layer encryption device was the Motorola Network Encryption System ( NES ). 16. Hence some remedial measures should be taken by the network layer to avoid these kind of situations. 17. It is typically measured at a reference point below the network layer and above the physical layer. 18. Additionally, as with all IP-based protocols, IPsec can operate at the network layer . 19. Convergence layer takes care of service dependent functionality between DLC and Network layer ( OSI 3 ). 20. IGMP operates on the network layer , just the same as other network management protocols like ICMP.
