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NAT Questions

January 28th, 2021 in ENCOR 350-401 Go to comments

Question 1

Explanation

The command “ip nat inside source list 1 interface gigabitethernet0/0 overload” translates all source addresses that pass access list 1, which means 172.16.1.0/24 subnet, into an address assigned to gigabitethernet0/0 interface. Overload keyword allows to map multiple IP addresses to a single registered IP address (many-to-one) by using different ports so it is called Port Address Translation (PAT).

Question 2

Explanation

In this question, the inside local addresses of the 10.1.1.0/27 subnet are translated into 209.165.201.0/27 subnet. This is one-to-one NAT translation as the keyword “overload” is missing so in fact answer B is also correct.

Question 3

Question 4

Explanation

The command “ip nat inside source list 10 interface FastEthernet0/1 overload” configures NAT to overload on the address that is assigned to the Fa0/1 interface.

Question 5

Explanation

The command “ip nat inside source list 10 interface G0/3 overload” configures NAT to overload (PAT) on the address that is assigned to the G0/3 interface.

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