NAT

Question 1

Clear all dynamic NAT translation entries:
R1# […]

Answer 1

clear ip nat translation *

Question 2

Show the NAT statistics:
R1# […]

Answer 2

show ip nat statistics

Question 3

Show the NAT translation table:
R1# […]

Answer 3

show ip nat translations

Question 4

When only source NAT is used, in the output of show ip nat translations you can expect the […] and […] addresses to be the same.

Answer 4

outside local / outside global

Question 5

Configure a static source NAT mapping:
R1(config)# […]

Answer 5

ip nat inside source static inside-local-ip inside-global-ip

Question 6

Configure the NAT outside interface:
R1(config-if)# […]

Answer 6

ip nat outside

Question 7

Configure the NAT inside interface:
R1(config-if)# […]

Answer 7

ip nat inside

Question 8

Cisco NAT terminology:
[…] = The IP address of the outside host from the perspective of the outside network.

Answer 8

Outside Global

Question 9

Cisco NAT terminology:
[…] = The IP address of the outside host from the perspective of the inside network.

Answer 9

Outside Local

Question 10

Cisco NAT terminology:
[…] = The IP address of the inside host from the perspective of the outside network.

Answer 10

Inside Global

Question 11

Cisco NAT terminology:
[…] = The IP address of the inside host from the perspective of the inside network.

Answer 11

Inside Local

Question 12

Static Source NAT = […] address is mapped to […] address.

Answer 12

Inside Local / Inside Global

Question 13

[…] NAT involves statically configuring one-to-one IP address mappings.

Answer 13

Static

Question 14

What does NAT stand for?

Answer 14

Network Address Translation

Question 15

Can private IPv4 addresses be used over the Internet?

Answer 15

No

Question 16

What is the class C range of private IPv4 addresses?

Answer 16

192.168.0.0/16

Question 17

What is the class B range of private IPv4 addresses?

Answer 17

172.16.0.0/12

Question 18

What is the class A range of private IPv4 addresses?

Answer 18

10.0.0.0/8

Question 19

Private IPv4 addresses are defined in RFC […].

Answer 19

1918

Question 20

In which form of NAT are multiple inside local addresses translated to a single inside global address at the same time?

Answer 20

PAT / NAT Overload

Question 21

In which form of NAT does the router automatically create one-to-one IP address mappings?

Answer 21

Dynamic NAT

Question 22

When an ACL is used to identify traffic in dynamic NAT/PAT, what happens to traffic denied by the ACL?

Answer 22

It is not translated by the router
(but the traffic is not dropped!)

Question 23

When an ACL is used to identify traffic in dynamic NAT/PAT, what happens to traffic permitted by the ACL?

Answer 23

It is translated by the router

Question 24

What does a router do if a packet requires NAT but no inside global addresses are available?

Answer 24

It drops the packet

Question 25

Which form of NAT is most useful for preserving public IP addresses?

Answer 25

PAT / NAT Overload

Question 26

What is another name for PAT?

Answer 26

NAT Overload

Question 27

What does PAT stand for?

Answer 27

Port Address Translation

Question 28

In dynamic NAT, what is used to identify the range of public IP address that can be used for translations?

Answer 28

A NAT pool

Question 29

In dynamic NAT/PAT, what is used to identify traffic that should be translated?

Answer 29

an ACL

Question 30

Configure dynamic PAT using the router’s interface IP:
R1(config)# […]

Answer 30

ip nat inside source list access-list interface interface overload

Question 31

Configure dynamic PAT using an address pool:
R1(config)# […]

Answer 31

ip nat inside source list access-list pool pool-name overload

Question 32

Configure dynamic NAT:
R1(config)# […]

Answer 32

ip nat inside source list access-list pool pool-name

Question 33

Configure a pool for dynamic NAT:
R1(config)# […]

Answer 33

ip nat pool pool-name start-ip end-ip [prefix-length prefix-length | netmask subnet-mask]