NAT
Inside address - Answer The address of the device which is being translated by NAT
Outside address - Answer The address of the destination device
Local address - Answer A local address is any address that appears o nthe inside
portion of the network
Global address - Answer A global address is any address that appears on the outside
portion of the network
Inside Local address - Answer The address of the source as seen from inside the
network. In the figure, the IPv4 address 192.168.10.10 is assigned to PC1. This is the
inside local address of PC1
Inside Global address - Answer The address of source as seen from the outside
network. R2 translates the inside local address to an inside global address. In this case,
R2 changes the IPv4 source address from 192.168.10.10 to 209.165.200.226.
Outside global address - Answer The address of the destination as seen from the
outside network. It is a globally routable IPv4 address assigned to a host on the
Internet. For example, the web server is reachable at IPv4 address 209.165.201.1. Most
often the outside local and outside global addresses are the same.
Outside local address - Answer The address of the destination as seen from the inside
network. In this example, PC1 sends traffic to the web server at the IPv4 address
209.165.201.1. While uncommon, this address could be different than the globally
routable address of the destination.
Static address translation (static NAT) - Answer One-to-one address mapping between
local and global addresses.
Dynamic address translation (dynamic NAT) - Answer Many-to-many address mapping
between local and global addresses.
Port Address Translation (PAT) - Answer Many-to-one address mapping between local
and global addresses. This method is also known as overloading (NAT overloading).
Why is static NAT useful? - Answer Static NAT is particularly useful for web servers or
devices that must have a consistent address that is accessible from the Internet, such
as a company web server. It is also useful for devices that must be accessible by
authorized personnel when offsite, but not by the general public on the Internet.
Inside address - Answer The address of the device which is being translated by NAT
Outside address - Answer The address of the destination device
Local address - Answer A local address is any address that appears o nthe inside
portion of the network
Global address - Answer A global address is any address that appears on the outside
portion of the network
Inside Local address - Answer The address of the source as seen from inside the
network. In the figure, the IPv4 address 192.168.10.10 is assigned to PC1. This is the
inside local address of PC1
Inside Global address - Answer The address of source as seen from the outside
network. R2 translates the inside local address to an inside global address. In this case,
R2 changes the IPv4 source address from 192.168.10.10 to 209.165.200.226.
Outside global address - Answer The address of the destination as seen from the
outside network. It is a globally routable IPv4 address assigned to a host on the
Internet. For example, the web server is reachable at IPv4 address 209.165.201.1. Most
often the outside local and outside global addresses are the same.
Outside local address - Answer The address of the destination as seen from the inside
network. In this example, PC1 sends traffic to the web server at the IPv4 address
209.165.201.1. While uncommon, this address could be different than the globally
routable address of the destination.
Static address translation (static NAT) - Answer One-to-one address mapping between
local and global addresses.
Dynamic address translation (dynamic NAT) - Answer Many-to-many address mapping
between local and global addresses.
Port Address Translation (PAT) - Answer Many-to-one address mapping between local
and global addresses. This method is also known as overloading (NAT overloading).
Why is static NAT useful? - Answer Static NAT is particularly useful for web servers or
devices that must have a consistent address that is accessible from the Internet, such
as a company web server. It is also useful for devices that must be accessible by
authorized personnel when offsite, but not by the general public on the Internet.
