Before configuring the NAT rules, consider the sequence of events for this scenario.
Host 192.0.2.250 sends an ARP request for the address 192.0.2.100 (the public address of the destination server).
The firewall receives the ARP request packet for destination 192.0.2.100 on the Ethernet1/1 interface and processes the request. The firewall responds to the ARP request with its own MAC address because of the destination NAT rule configured.
The NAT rules are evaluated for a match. For the destination IP address to be translated, a destination NAT rule from zone Untrust-L3 to zone Untrust-L3 must be created to translate the destination IP of 192.0.2.100 to 10.1.1.100.
After determining the translated address, the firewall performs a route lookup for destination
10.1.1.100 to determine the egress interface. In this example, the egress interface is Ethernet1/2 in zone DMZ.
The firewall performs a security policy lookup to see if the traffic is permitted from zone Untrust- L3 to DMZ.
The direction of the policy matches the ingress zone and the zone where the server is physically located.
The security policy refers to the IP address in the original packet, which has a destination address of 192.0.2.100.

Active/Active - Both firewalls in the pair are active and processing traffic and work synchronously to handle session setup and session ownership. Both firewalls individually maintain session tables and routing tables and synchronize to each other. Active/active HA is supported in virtual wire and Layer 3 deployments.
https://docs.paloaltonetworks.com/pan-os/10-2/pan-os-admin/high-availability/ha-concepts/ha- modes

The number you specify for the bandwidth applies to both the egress and ingress traffic for the remote network connection. If you specify a bandwidth of 50 Mbps, Prisma Access provides you with a remote network connection with 50 Mbps of bandwidth on ingress and 50 Mbps on egress.
Your bandwidth speeds can go up to 10% over the specified amount without traffic being dropped; for a 50 Mbps connection, the maximum bandwidth allocation is 55 Mbps on ingress and 55 Mbps on egress (50 Mbps plus 10% overage allocation).
https://docs.paloaltonetworks.com/prisma/prisma-access/prisma-access-panorama- admin/prisma-access-for-networks/how-to-calculate-network-bandwidth