200-301 · Question #787
Which NAT function can map multiple inside addresses to a single outside address?
The correct answer is A. PAT. Port Address Translation (PAT) is a Network Address Translation (NAT) function that allows multiple internal private IP addresses to share a single public IP address by differentiating traffic based on port numbers.
Question
Options
- APAT
- BSFTP
- CRARP
- DARP
- ETFTP
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(29 responses)- A93% (27)
- C3% (1)
- D3% (1)
Why each option
Port Address Translation (PAT) is a Network Address Translation (NAT) function that allows multiple internal private IP addresses to share a single public IP address by differentiating traffic based on port numbers.
PAT (Port Address Translation), also known as NAT Overload, is a NAT function that translates multiple internal (inside local) IP addresses to a single external (outside global) IP address by utilizing unique source port numbers to differentiate the translated connections, thus conserving public IP addresses.
SFTP (SSH File Transfer Protocol) is a secure application-layer protocol for file transfer, unrelated to network address translation.
RARP (Reverse Address Resolution Protocol) is used to find the IP address of a host given its MAC address, which is distinct from NAT functionality.
ARP (Address Resolution Protocol) is used to map IP addresses to MAC addresses on a local network, serving a different purpose than NAT.
TFTP (Trivial File Transfer Protocol) is a simple file transfer protocol, unrelated to network address translation.
Concept tested: NAT Overload (PAT) functionality
Source: https://www.cisco.com/c/en/us/support/docs/ip/network-address-translation-nat/26704-nat-faq.html
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