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Free Online Flashcard Deck

4 NAT Configuration and Troubleshooting Free Online FlashCards

Study 4 NAT Configuration and Troubleshooting with 12 free online flashcards. Review key terms, definitions, and concepts with this interactive flashcard deck.

12 cards
01
Front

What does Network Address Translation do?

Back

NAT rewrites packet addresses as traffic crosses a router.

02
Front

What is static NAT?

Back

Static NAT creates a persistent one-to-one mapping between an inside address and a fixed global address.

03
Front

What does port forwarding map?

Back

Port forwarding maps a specific outside address and port to an inside server and port.

04
Front

How are NAT interface roles marked in Cisco IOS?

Back

Apply ip nat inside to the inside interface and ip nat outside to the ISP-facing interface.

05
Front

What does a NAT source ACL control?

Back

A NAT ACL selects source traffic for translation; it does not itself permit or deny access like a firewall rule.

06
Front

What can happen when a dynamic NAT pool is exhausted?

Back

If every pool address is in use, additional hosts may not receive a translation.

07
Front

How should a dynamic NAT pool relate to static NAT addresses?

Back

Keep dynamic pool addresses separate from statically assigned NAT addresses to prevent conflicts.

08
Front

In the web-server example, where does outside TCP port 8080 forward?

Back

Outside clients connect to 198.51.100.11 on TCP port 8080; NAT forwards traffic to 192.168.10.20 on port 80.

09
Front

What information does the NAT translation table show?

Back

It shows the protocol, inside-global and inside-local addresses, and ports for port-based entries.

10
Front

Which return routes are important for NAT traffic?

Back

The router needs an outside route, the ISP must route the global address or pool back to it, and the inside server must return traffic through the expected gateway.

11
Front

What do NAT troubleshooting results suggest: no translation versus a broken session?

Back

No translation points to rule matching, interface direction, or routing. A translation without a working session points to return routing, filtering, or the destination service.

12
Front

How does dynamic NAT assign addresses?

Back

Dynamic NAT assigns an available address from a configured pool to an eligible inside host.