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Zorluk: KolayInside Source NAT and PAT Configuration and Verification

An administrator needs to configure Port Address Translation (PAT) on a Cisco IOS router to allow multiple internal hosts matched by Access Control List 15 to share the single IPv4 address assigned to interface GigabitEthernet0/1 for internet access. Which command correctly enables this configuration?

  1. ip nat inside source list 15 interface GigabitEthernet0/1 overloadCevap
  2. B
    ip nat inside source list 15 interface GigabitEthernet0/1
  3. C
    ip nat outside source list 15 interface GigabitEthernet0/1 overload
  4. D
    ip nat inside source static list 15 interface GigabitEthernet0/1

Cevap

The command 'ip nat inside source list 15 interface GigabitEthernet0/1 overload' correctly configures Port Address Translation (PAT).
The command stating 'ip nat inside source list 15 interface GigabitEthernet0/1 overload' is correct because it properly binds inside source traffic allowed by ACL 15 to the interface's IP address and appends the 'overload' keyword, enabling PAT (Port Address Translation) via TCP/UDP port mapping.

Adım Adım Çözüm

1
Identify the requirement for translating multiple private IP addresses to a single interface IP address.
Port Address Translation (PAT) using the overload keyword on an interface is required.
The overload keyword allows multiple internal IP addresses to map to a single public IP address using distinct layer 4 source port numbers.
2
Construct the Cisco IOS configuration syntax for interface-based PAT.
The correct command syntax is 'ip nat inside source list <acl> interface <type/number> overload'.
This binds the inside source traffic matched by the specified ACL to the outbound interface IP address with port overloading.

Anahtar Kavram

Port Address Translation (PAT) Configuration using Interface Overload
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Konular

Inside Source NAT and PAT Configuration and Verification

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