Network security is offered via NAT. NAT must be set up before Srv 1 can communicate on the internet since the connected sub net uses private IP addressing.
What is WAN interface?
A detachable card known as a WAN interface card often houses the router's serial interfaces (WIC). The clocking function is performed by the CSU. The router's serial interfaces' use of timing and speed to transmit and receive bits over the serial wire are physically controlled by this function. Due to NTP's high efficiency, just one packet per minute is required to synchronise two machines to within one millisecond. The router must use DHCP to obtain its IP address and other setup data, per the ISP's instructions.
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