Volume 2 - Chapter 14: Network Address Translation Flashcards
Cisco commands that use the terminology “inside local” refer to?
Private addresses
Cisco commands that use the terminology “inside global” refer to?
Public addresses
Describe the difference between static and dynamic NAT mappings.
Static mappings are made using a static one-to-one configuration
Dynamic NAT entries happen automatically when devices try to reach the internet using a pool of public address. First come first serve.
What command can be used to remove a dynamic NAT entry?
clear ip nat translation *
Dynamic NAT triggers new NAT entries only for packets entering the ____ interface.
Inside
What is the command to set an interface as the inside/outside of a NAT design?
In interface configuration mode:
ip nat inside/outside
What is the command to configure a static NAT rule to translate a source IP of 10.255.40.2 to 208.171.245.3?
ip nat inside source static 10.255.40.2 208.171.245.3
What command can be used to list the current NAT translations being performed on a router?
show ip nat translations
What command can be used to list the current active NAT entries and hits in the NAT table?
show ip nat statistics
What command is used to create a NAT pool with a name of “Alex” with a range of 101.245.166.2 to 101.245.166.3?
ip nat pool Alex 101.245.166.2 101.245.166.3 255.255.255.252
What command is used to create a dynamic NAT rule to match ACL 1 and a NAT pool with the name “Alex”?
ip nat inside source list 1 pool Alex
Describe the difference between the “miss” and “hit” counters with teh show ip nat statistics.
Miss: a packet entered the router and a NAT rule did not exist, a NAT entry was added
Hit: a packet entered the router and a NAT rule already existed that matches; no new NAT entry is added
