DHCP & NAT
What two statements are not a type of NAT addressing?
Outside local-private, and Outside global-private, secure, hidden
Applications that use ____ instead of a qualified domain name will not reach destinations that are translated across the NAT router.
Physical addresses
What command shows that DHCP is operational?
Show ip DHCP binding
What command shows all active translations on your router?
Show ip nat translations
Which statement about NAT translations is true (2)?
They allow connection to be initiated from the outside (2)
Which statement about NAT translations is true (1)?
They are always present in the NAT table (1)
NAT allows you to have more than your allocated number of IP addresses.
True
In an office environment with DHCP assigned to PC's, printers and servers should be configured with static IP addresses.
True.
NAT implementations do not necessarily try to preserve the original port number.
True.
Routers by default will not forward broadcast packets:
True.
With PAT multiple private IP addresses can be translated by a single public address (many-to-one translation):
True.
The default-lease value for a DHCP is?
1 day
When using PAT, what is the max total number of internal addresses that can be translated to 1 external address?
65,536
You configure the border router with the command <b>R1(config# ip nat inside source list 7 pool Ranken.</br> What is required to be configured in order for this particular command to work?
A NAT pool named Ranken that defines the starting and ending public IP addresses.
An admin is configuring NATing on a network using PAT. What command will be issued to only create the access list for the network address 172.16.15.0 - 172.16.15.55?
Access-list 1 permit 172.16.15.0 172.16.15.55
NAT overload ______
Changes many ip addresses to a single outside address with ports.
What is the order that DHCP servers and clients go through for the client to receive an Address?
Discover, Offer, Request, Acknowledgment
NAT translations can occur:
Dynamically and Statically
Administrators should use the ____ command to relay broadcast requests for these key udp services.
IP helper address
Which command listed below will exclude the IP address 172.31.2.132?
Ip dhcp excluded-address 172.31.2.132
Which commands configure static NAT?
Ip nat inside source static <inside local><inside global> Int fa0/0 Ip nat inside Int s0/1/0 Ip nat outside
What commands must be used on your router interfaces before NAT will translate addresses?
Ip nat inside, ip nat outside
What are two benefits of NAT (2)?
NAT eliminates the need to re-address all hosts that require external access. (2)
What are two benefits of NAT (1)?
NAT protects network security because private networks are not advertised. (1)
When a DHCP server is configured, which three IP addresses should never be assignable to hosts:
Network (or subnetwork) id addresses, Broadcast IP address of the network, Ddesignated IP address of the DHCP server
What are two of the required steps to configure Port Address Translation(PAT)?
You must define the pool of public addresses to be used for overload translation, and You must identify the inside interface.
