https://en.m.wikipedia.org/wiki/Null_route

https://m.bayt.com/en/specialties/q/48421/what-is-the-difference-between-bgp-border-gateway-protocol-and-igp-interior-gateway-protocol

http://www.auben.net/index.php/en/technologies/routing/bgp-igp-routing-protocols

https://learningnetwork.cisco.com/thread/65315

https://en.m.wikipedia.org/wiki/Interior_gateway_protocol

What are the Differences between IGP, iBGP and eBGP? from networking

https://my.esecuredata.com/index.php?/knowledgebase/article/2/add-a-static-route-on-centos

https://networkengineering.stackexchange.com/questions/37700/source-nat-and-destination-nat

https://en.wikipedia.org/wiki/Network_address_translation

Notes :For Nat src and DSt Traffic send and Recieve cross unique Router That Nat do on it

https://bgpstream.com

http://www.rmalekghasemi.ir/file/IPV6 mikrotik Presentation.pdf

http://www.rmalekghasemi.ir/file/IPV6 mikrotik explain2.pdf

http://37.156.146.163/PUB/S0ftWarE/C!sC0/IOS

show ip route | include IPADDRESS-Gatway

For example

show ip route | include 172.20.20.6

Show all ipaddress routed to 172.20.20.6

https://stackoverflow.com/questions/40189084/what-is-ipv6-for-localhost-and-0-0-0-0

https://gist.github.com/lepiaf/4f18bf45293dcd938e561d982e28b5d0