Network Address Translation

What is a primary reason for the development and widespread use of Network Address Translation (NAT)?

• To improve internet speed and performance.

• To enhance network security by encrypting traffic.

• To overcome the limited number of available IPv4 addresses.

• To simplify the configuration of large enterprise networks.

Which of the following IP address ranges is defined by RFC 1918 as a private IPv4 address range, commonly used within local networks?

• 1.1.1.0 - 1.1.1.255

• 192.168.0.0 - 192.168.255.255

• 203.0.113.0 - 203.0.113.255

• 169.254.0.0 - 169.254.255.255

When a device with a private IP address initiates communication with a public server on the internet, what action does a Network Address Translation (NAT) router typically perform on the source IP address of the outgoing packet?

• It encrypts the source IP address for security.

• It replaces the private source IP address with a public IP address.

• It adds a new private IP address to the packet header.

• It discards the packet if the source IP is private.

What additional information does NAT overload (PAT) use, besides the IP address, to allow multiple internal devices to share a single public IP address for outbound connections?

• MAC addresses

• Subnet masks

• Port numbers

• Gateway addresses