NAT for IPV4

True or False? With NAT overload, each inside local IP address is translated to a unique inside global IP address on a one-for-one basis.

• True

• False

True or False? The use of NAT makes end-to-end traceability between source and destination easier.

• True

• False

Which two statements accurately describe an advantage or a disadvantage when deploying NAT for IPv4 in a network? (Choose two.)

• NAT will impact negatively on switch performance.

• NAT causes routing tables to include more information.

• NAT provides a solution to slow down the IPv4 address depletion.

• NAT introduces problems for some applications that require end-to-end connectivity.

• NAT improves packet handling.

What are two tasks to perform when configuring static NAT? (Choose two.)

• Configure a NAT pool.

• Create a mapping between the inside local and inside global addresses.

• Identify the participating interfaces as inside or outside interfaces.

• Define the inside global address on the server.

• Define the outside global address.

What is a disadvantage of NAT?

• There is no end-to-end addressing.

• The router does not need to alter the checksum of the IPv4 packets.​

• The internal hosts have to use a single public IPv4 address for external communication.

• The costs of readdressing hosts can be significant for a publicly addressed network.​

What is one advantage of using NAT at the edge of the network?

• NAT enables end-to-end IPv4 traceability, making troubleshooting easier.

• Performance is significantly increased because the router does not have to perform as many route lookups.

• Dynamic NAT allows devices from outside the local network to easily initiate TCP connections to inside hosts.

• Changing ISPs is simpler because the devices on the inside network do not have to be configured with new addresses when the outside address changes.

What benefit does NAT64 provide?

• It allows sites to use private IPv6 addresses and translates them to global IPv6 addresses.

• It allows sites to connect multiple IPv4 hosts to the Internet via the use of a single public IPv4 address.

• It allows sites to connect IPv6 hosts to an IPv4 network by translating the IPv6 addresses to IPv4 addresses.

• It allows sites to use private IPv4 addresses, and thus hides the internal addressing structure from hosts on public IPv4 networks.

What address translation is performed by static NAT?

• An inside local address is translated to a specified outside global address.

• An inside local address is translated to a specified inside global address.

• An inside local address is translated to a specified outside local address.

• An outside local address is translated to a specified outside global address.

Why is NAT not needed in IPv6?​

• Because IPv6 has integrated security, there is no need to hide the IPv6 addresses of internal networks.​

• Any host or user can get a public IPv6 network address because the number of available IPv6 addresses is extremely large.​

• The problems that are induced by NAT applications are solved because the IPv6 header improves packet handling by intermediate routers.​

• The end-to-end connectivity problems that are caused by NAT are solved because the number of routes increases with the number of nodes that are connected to the Internet.

Which version of NAT allows many hosts inside a private network to simultaneously use a single inside global address for connecting to the Internet?

• PAT

• Static NAT

• Dynamic NAT

• Port forwarding