CCNA NAT Questions

What type of address translation can use only one address to allow thousands of hosts to be translated globally?

PAT(Port address translation) or NAT Overload

What type of NAT uses a 1 to 1 mapping of addresses?

Static NAt

does the asterisk (*) represent in the following output? NAT*: s=172.16.2.2, d=192.168.2.1->10.1.1.1 [1]

The packet was fast switched to the destination

What command will clear all your NAT entries from the translation table?

clear ip nat translations *

What command can you use to show the NAT translations as they occur on your router?

debug ip nat

Which command has the following output: 01:12:36: NAT: s=192.168.30.2->171.16.10.100, d=171.16.10.1 [35] 01:12:36: NAT*: s=171.16.10.1, d=171.16.10.100->192.168.30.2 [35] 01:12:36: NAT*: s=192.168.30.2->171.16.10.100, d=171.16.10.1 [36]

debug ip nat

What is considered to be the inside hosts address after translation?

inside global

What is considered to be the inside hosts adress before translation

inside local

Which command would you place on the private network router interface?

ip nat inside

What command needs to be added to the configuration to enable PAT? ip nat pool Corp 198.18.41.129 198.18.41.134 netmask 25.255.255.248 access-list 1 permit 192.168.76.64 0.0.0.31

ip nat inside source list 1 pool Corp overload

Which commands configure static NAT?

ip nat inside source static <inside local> <inside global> int eth0 ip nat inside int s0 ip nat outside

What commands must be used on your router interfaces before NAT will translate addresses?

ip nat inside, ip nat outside

Which command would you place on the internet router interface?

ip nat outside

Which commands configure dynamic NAT?

ip nat pool <pool name> <1st add> <last add> netmask <mask> ip nat inside source list 1 pool <pool name> access-list 1 permit <netword addr> <wildcard mask> int eth0 ip nat inside int s0 ip nat outside

Which commands configure PAT?

ip nat pool <pool name> <add> <add> netmask <mask> ip nat inside source list 1 pool <pool name> overload access-list 1 permit <netword addr> <wildcard mask> int eth0 ip nat inside int s0 ip nat outside

Which command can be used to create a dynamic NAT pool named "Corp" that will provide address 192.168.1.65 - 192.168.1.94?

ip nat pool Corp 192.168.1.65 192.168.1.94 net 255.255.255.224

Instead of the "netmask" command, you can use the _______ statement.

prefix-length

Which command can be used for troubleshooting and displays a summary of the NAT configuration

show ip nat statistics

Which command has the following output: Total translations: 2 (0 static, 2 dynamic, 2 extended) Outside Interfaces: Serial0/0/1 Inside Interfaces: Serial0/0/0 Hits: 81 Misses: 2 Expired translations: 0 Dynamic mappings: -- Inside Source access-list 1 pool GlobalNet refCount 2 pool GlobalNet: netmask 255.255.255.248 start 171.16.10.50 end 171.16.10.55 type generic, total addresses 6 , allocated 2 (33%), misses 0

show ip nat statistics

Which command shows counts of active translation types and hits to an existing mapping?

show ip nat statistics

This is output for which command? Pro Inside global Inside local Outside local Outside global --- 1.1.128.1 10.1.1.1 --- --- --- 1.1.130.178 10.1.1.2 --- ---

show ip nat trans

What command will show you the translation table?

show ip nat translations

And inside global is before or after translation?

After

An inside local is before or after translation?

Before

In the following output, what type of NAT is being used? ip nat pool name nat 170.168.10.10 170.168.10.20 netmask 255.255.255.0

Dynamic NAT