NAT Flashcards
What does NAT stand for?
Network Address Translation
True or False: NAT allows multiple devices on a local network to share a single public IP address.
True
What is the primary purpose of NAT?
To conserve public IP addresses and enhance security.
Fill in the blank: NAT translates private IP addresses to _____ IP addresses.
public
What are the three main types of NAT?
Static NAT, Dynamic NAT, and PAT (Port Address Translation)
Which type of NAT maps a single public IP address to multiple private IP addresses using different port numbers?
PAT (Port Address Translation)
What is Static NAT typically used for?
To map a single private IP address to a single public IP address.
True or False: Dynamic NAT requires a pool of public IP addresses.
True
What is the main disadvantage of NAT?
It can complicate certain protocols and applications that embed IP address information.
Which NAT type is most commonly used in home routers?
PAT (Port Address Translation)
Fill in the blank: NAT operates at layer _____ of the OSI model.
Network
What command is used to configure NAT on a Cisco router?
ip nat inside source
True or False: NAT can be used to hide internal IP addresses from external networks.
True
What is the role of the NAT table?
To keep track of active connections and their corresponding translations.
How does NAT affect VPN connections?
It can cause issues because the embedded IP addresses may not translate correctly.
What is the difference between inside local and inside global addresses?
Inside local addresses are the private IP addresses used within a network, while inside global addresses are the public IP addresses that are visible on the internet.
Which command displays the NAT translation table on a Cisco router?
show ip nat translations
Fill in the blank: In NAT, the term ‘overloading’ refers to _____
PAT (Port Address Translation)
True or False: NAT does not affect the performance of a network.
False
What is a common application of Static NAT?
Hosting a server that needs a consistent public IP address.
What is the default timeout for NAT translations?
24 hours
Which type of NAT is better suited for environments with limited public IP addresses?
PAT (Port Address Translation)
What is a disadvantage of using Static NAT?
It requires a one-to-one mapping, which can waste public IP addresses.
Which command can be used to configure a NAT pool on a Cisco router?
ip nat pool
True or False: NAT can be used to translate both IPv4 and IPv6 addresses.
False
What protocol does NAT commonly have issues with due to embedded IP addresses?
FTP (File Transfer Protocol)
