Lab question about assigning pool of addresses for NAT My question is why are we using .129 as the first address...how many addresses are there, is

Lab question about assigning pool of addresses for NAT

My question is why are we using .129 as the first address...how many addresses are there, is there specific range? i just want to be able to explain this in words

Step 2: Configure a pool of addresses for NAT.

Configure R2 with a NAT pool named R2POOL that uses the first address in the 209.165.202.128/30 address space.

R2(config)#ip nat pool R2POOL 209.165.202.129 209.165.202.129 netmask 255.255.255.252