An administrator configures dynamic NAT on a Cisco IOS router using a pool containing a single public IP address () to enable Internet connectivity for internal workstations. During testing, only the first internal user who initiates outbound traffic can access external sites. All subsequent attempts from other internal users to access the Internet fail. Which action on the router resolves this connectivity issue?
- Append the `overload` keyword to the `ip nat inside source list <ACL> pool <POOL>` configuration command.Cevap
- BExpand the internal access list to match the public IP range instead of RFC 1918 private space.
- CReconfigure the translation using `ip nat inside source static` to dynamically allocate port numbers to the pool.
- DSwap the interface assignments so that the LAN interface is configured with `ip nat outside` and the WAN with `ip nat inside`.
Cevap
Append the `overload` keyword to the global `ip nat inside source list <ACL> pool <POOL>` command to enable Port Address Translation (PAT).
When dynamic NAT is configured with an IP NAT pool containing a single public IP address, omitting the `overload` keyword restricts translations to a single 1-to-1 mapping. Once the first host initiates traffic, the single address in the pool is exhausted. Appending the `overload` keyword enables Port Address Translation (PAT), allowing multiple internal hosts to share the single IP address concurrently by tracking unique Layer 4 source port numbers.
Adım Adım Çözüm
Anahtar Kavram
Port Address Translation (PAT) Overload Configuration