350-401 · Question #417
Refer to the exhibit. Which action completes the configuration to achieve a dynamic continuous mapped NAT for all users?
The correct answer is C. Increase the NAT pool size to support 254 usable addresses.. To achieve dynamic continuous mapped NAT for all users, the NAT pool must be adequately sized to handle the anticipated number of concurrent translations.
Question
Exhibits
Options
- AConfigure a match-host type NAT pool.
- BReconfigure the pool to use the 192.168.1.0 address range.
- CIncrease the NAT pool size to support 254 usable addresses.
- DConfigure a one-to-one type NAT pool.
How the community answered
(33 responses)- A6% (2)
- B9% (3)
- C82% (27)
- D3% (1)
Why each option
To achieve dynamic continuous mapped NAT for all users, the NAT pool must be adequately sized to handle the anticipated number of concurrent translations.
''Match-host type NAT pool'' is not a standard or recognized NAT pool configuration type in Cisco IOS, and thus would not resolve a capacity issue.
The 192.168.1.0 address range is a private IP address space, which is used for internal networks and cannot be used as a public NAT pool for outside global addresses accessible on the internet.
Dynamic NAT, especially with Port Address Translation (PAT), maps multiple private IP addresses to a smaller set of public IP addresses. If the NAT pool is too small, it will become exhausted, preventing new connections; increasing the pool size to support 254 usable addresses provides sufficient capacity for 'all users' to achieve 'dynamic continuous mapped NAT'.
A one-to-one type NAT pool provides static mapping where each private IP address is permanently mapped to a distinct public IP address, which is not dynamic and would not efficiently support 'all users' needing dynamic outbound access compared to PAT.
Concept tested: NAT pool sizing and dynamic NAT configuration
Source: https://www.cisco.com/c/en/us/td/docs/ios/nat/configuration/guide/nat_c/ncg_config_nat_pools.html
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