Cisco Network --- Dynamic NAT for Internal users access the Internet

In this scenario we want to know the computer go through Network device as Switch/Router to access Internet.
Based on Cisco device, write down the relation learning information for the reference.
Setting an IP on the WAN/LAN interface
Step 1. Define Fast Ethernet 0/0 with an IP address as 192.168.10.171 by using the following command.So does that the configuration will be changed as follows:
AS-ISTO-BE

Step 2. Define Ethernet 2/0  with an IP address as 10.10.101.253 by using the following command.

Setting Static default Route
Step 3. Due to assign the IP address manually, we have to define a default route by using the ip route 0.0.0.0 0.0.0.0 192.168.10.254 command
Defining NAT inside and outside interfaces
Step 4. Define Fast Ethernet 0/0 as a NAT outside interface by using the following command.
Step 5. Define Ethernet 2/0 as a NAT inside interface by using the following command.

Define Inside global IP Address Range (with no-overload or overload)
Step 6. Define a NAT pool named as no-overload with a range of addresses 192.168.10.200 ~ 192.168.10.240 by using the ip nat pool <pool name> <strart ip> <end ip> prefix <prefix length> command

Define Inside local IP Address Range
Step 7. Define Access List 6 that it permit packets with source addresses ranging from 10.10.103.0 to 10.10.103.255

Define the relationship of between Inside local and Inside global
Step 8. Define “Access list 6” address can NAT to a pool “no-overload” by using the ip nat inside source list <access list number> pool <pool name> command
To verify the NAT translations in the router by using the show ip nat translations commandTo clear dynamic Network Address Translation (NAT) translations from the translation table by using the clear ip nat translations * command
Reference
(# 1)   The keyword overload used in the ip nat inside source list 103 pool ovrld overload command allows NAT to translate multiple inside devices to the single address in the pool.
(# 2)   Protocols with Access Lists Specified by Numbers

Protocol	Range
IP	1 to 99
Extended IP	100 to 199
Ethernet type code	200 to 299
Ethernet address	700 to 799
Transparent bridging (protocol type)	200 to 299
Transparent bridging (vendor code)	700 to 799
Extended transparent bridging	1100 to 1199
DECnet and extended DECnet	300 to 399
XNS	400 to 499
Extended XNS	500 to 599
AppleTalk	600 to 699
Source-route bridging (protocol type)	200 to 299
Source-route bridging (vendor code)	700 to 799
IPX	800 to 899
Extended IPX	900 to 999
IPX SAP	1000 to 1099
Standard VINES	1 to 100
Extended VINES	101 to 200
Simple VINES	201 to 300