Cisco Router On DHCP

R1 Configuration !!!

R1>enable
R1#configure terminal
R1(config)#interface fastEthernet 0/0
R1(config-if)#ip add 192.168.10.254 255.255.255.0
R1(config-if)#no shut
R1(config-if)#do write me
R1(config)#interface fastEthernet 0/1
R1(config-if)#ip add 172.16.20.254 255.255.255.0

R1(config-if)#no shut
R1(config-if)#do write me
R1(config)#ip dhcp pool Net_A
R1(dhcp-config)#network 192.168.10.0 255.255.255.0
R1(dhcp-config)#default-router 192.168.10.254
R1(dhcp-config)#dns-server 10.10.10.10
R1(dhcp-config)#exit
R1(config)#ip dhcp pool Net_B
R1(dhcp-config)#network 172.16.20.0 255.255.255.0
R1(dhcp-config)#default-router 172.16.20.254
R1(dhcp-config)#dns-server 10.10.10.10
R1(dhcp-config)#do write me
R1(dhcp-config)#exit

How to Configure!!!!!!!
Comment!!!!!!!!!!!
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