CCNA 2 - NAT

Dynamic NAT _____________.

• always maps a private IP address to a public IP address

• provides an automated mapping of inside local to inside global IP addresses

• provides a mapping of internal host names to IP addresses

• dynamically provides IP addressing to internal hosts

The PCs on your company's internal network are assigned IP addresses from DHCP servers, and the packets that they send to the Internet are translated through a NAT-enabled router. What type of NAT enables the router to populate the translation table from a pool of unique public addresses, as the PCs send packets through the router to the Internet?

• static NAT

• dynamic NAT

• PAT

• ARP

What is the correct relation to NAT for IPv6?

• it is used to convert private IPv6 addresses to public ones

• it is a temporary mechanism to assist in the migration from IPv4 to IPv6

• NAT64 has been deprecated by IETF in favor of NAT-PT

• Dual stack is an example of implementation of NAT for IPv6

You configure a border router with the command R1(config)# ip nat inside source list 4 pool copr. Which ACL is required to be configured in order for this command to function?

• an ACL named corp that defines the starting and ending public IP addresses

• an ACL named corp that defines the private addresses that are affected by NAT

• an ACL that is numbered 4 that defines the starting and ending public IP addresses

• an ACL that is numbered 4 that defines the private addresses that are affected by NAT

Which network device is typically used to perform NAT for corporate environments?

• DHCP server

• host device

• router

• server

• switch

You want to examine the active NAT translations on a border router. Which command allows you to do this?

• show ip nat translations

• show ip nat statistics

• clear ip nat translations

• debug ip nat translations

What is the purpose of entering the command ip nat inside source static tcp 192.168.10.2 80 209.165.200.223 8080 at the global configuration prompt?

• It identifies the inside NAT interface on the router

• It prevents the router from establishing a connection with any device that does not have the specified address and port number

• It binds the inside local address and local port to the specified inside global address and global port

• It enables a one to one translation between different internal port numbers

What method does a PAT-enabled router use to send incoming packets to the correct inside host?

• Destination TCP or UDP port number on the incoming packet

• Source IP address on the incoming packet

• Source TCP or UDP port number on the incoming packet

• Combination of TCP or UDP port number and the destination IP address on the incoming packet

NAT overload is known as ______________

• NAT-O

• ONAT

• PAT

• SAT

What is defined by the ip nat pool command when configuring dynamic NAT?

• the pool of available NAT servers

• the range of external IP addresses that internal hosts are permitted to access

• the range of internal IP addresses that are translated

• the pool of global addresses