1. What is NAT ? Junior A. translating private IP addresses to public ones for Internet access B. techniques letting peer-to-peer apps establish connections through NAT devices C. rewriting the destination address to redirect inbound traffic to an internal host D. allowing internal hosts to reach an internal server via its public address
2. Which term means: "translating private IP addresses to public ones for Internet access"? Junior A. Carrier-grade NAT (CGNAT) B. Inside global address C. NAT D. Source NAT (SNAT)
3. Which statement is correct? Junior A. NAT — rewriting the source address of outbound packets to a shared public IP B. NAT — translating private IP addresses to public ones for Internet access C. NAT — the private IP of a host as seen inside the NAT-enabled network D. NAT — the public IP a host is translated to when reaching the Internet
4. What is Static NAT ? Junior A. rewriting the destination address to redirect inbound traffic to an internal host B. a fixed one-to-one mapping between a private and a public IP address C. the public IP a host is translated to when reaching the Internet D. large-scale NAT by ISPs sharing public IPs among many subscribers
5. Which term means: "a fixed one-to-one mapping between a private and a public IP address"? Junior A. Static NAT B. Outside local address C. NAT D. Outside global address
6. Which statement is correct? Junior A. Static NAT — the address of an external host as it appears inside the local network B. Static NAT — public addresses are globally routable while private ones are confined to local networks C. Static NAT — a fixed one-to-one mapping between a private and a public IP address D. Static NAT — mapping many private hosts to one public IP by distinguishing them via port numbers
7. What is Dynamic NAT ? Junior A. a fixed one-to-one mapping between a private and a public IP address B. the address of an external host as it appears inside the local network C. mapping private addresses to public ones from a pool as needed D. mapping an external port to an internal host so inbound connections reach it
8. Which term means: "mapping private addresses to public ones from a pool as needed"? Junior A. Destination NAT (DNAT) B. Port forwarding C. NAT traversal (STUN/TURN) D. Dynamic NAT
9. Which statement is correct? Junior A. Dynamic NAT — mapping many private hosts to one public IP by distinguishing them via port numbers B. Dynamic NAT — mapping private addresses to public ones from a pool as needed C. Dynamic NAT — mapping an external port to an internal host so inbound connections reach it D. Dynamic NAT — the table tracking active mappings of inside to outside addresses and ports
10. What is Public vs private IP ? Junior A. the table tracking active mappings of inside to outside addresses and ports B. mapping private addresses to public ones from a pool as needed C. public addresses are globally routable while private ones are confined to local networks D. rewriting the source address of outbound packets to a shared public IP
11. Which term means: "public addresses are globally routable while private ones are confined to local networks"? Junior A. Hairpin NAT (NAT loopback) B. Public vs private IP C. Outside global address D. NAT translation table
12. Which statement is correct? Junior A. Public vs private IP — the private IP of a host as seen inside the NAT-enabled network B. Public vs private IP — allowing internal hosts to reach an internal server via its public address C. Public vs private IP — the address of an external host as it appears inside the local network D. Public vs private IP — public addresses are globally routable while private ones are confined to local networks
13. What is PAT (NAT overload) ? Mid A. the public IP a host is translated to when reaching the Internet B. mapping private addresses to public ones from a pool as needed C. mapping many private hosts to one public IP by distinguishing them via port numbers D. allowing internal hosts to reach an internal server via its public address
14. Which term means: "mapping many private hosts to one public IP by distinguishing them via port numbers"? Mid A. NAT traversal (STUN/TURN) B. Source NAT (SNAT) C. PAT (NAT overload) D. Destination NAT (DNAT)
15. Which statement is correct? Mid A. PAT (NAT overload) — the address of an external host as it appears inside the local network B. PAT (NAT overload) — the private IP of a host as seen inside the NAT-enabled network C. PAT (NAT overload) — rewriting the source address of outbound packets to a shared public IP D. PAT (NAT overload) — mapping many private hosts to one public IP by distinguishing them via port numbers
16. What is Inside local address ? Mid A. allowing internal hosts to reach an internal server via its public address B. the address of an external host as it appears inside the local network C. the private IP of a host as seen inside the NAT-enabled network D. the public IP a host is translated to when reaching the Internet
17. Which term means: "the private IP of a host as seen inside the NAT-enabled network"? Mid A. Inside global address B. Inside local address C. NAT D. Static NAT
18. Which statement is correct? Mid A. Inside local address — the public IP of a remote destination as seen on the Internet B. Inside local address — the private IP of a host as seen inside the NAT-enabled network C. Inside local address — translation that lets IPv6-only clients reach IPv4-only servers D. Inside local address — large-scale NAT by ISPs sharing public IPs among many subscribers
19. What is Inside global address ? Mid A. the public IP a host is translated to when reaching the Internet B. the table tracking active mappings of inside to outside addresses and ports C. translation that lets IPv6-only clients reach IPv4-only servers D. large-scale NAT by ISPs sharing public IPs among many subscribers
20. Which term means: "the public IP a host is translated to when reaching the Internet"? Mid A. Full-cone NAT B. Dynamic NAT C. NAT translation table D. Inside global address
21. Which statement is correct? Mid A. Inside global address — mapping an external port to an internal host so inbound connections reach it B. Inside global address — large-scale NAT by ISPs sharing public IPs among many subscribers C. Inside global address — public addresses are globally routable while private ones are confined to local networks D. Inside global address — the public IP a host is translated to when reaching the Internet
22. What is Port forwarding ? Mid A. rewriting the destination address to redirect inbound traffic to an internal host B. the table tracking active mappings of inside to outside addresses and ports C. rewriting the source address of outbound packets to a shared public IP D. mapping an external port to an internal host so inbound connections reach it
23. Which term means: "mapping an external port to an internal host so inbound connections reach it"? Mid A. PAT (NAT overload) B. Port forwarding C. Destination NAT (DNAT) D. Outside global address
24. Which statement is correct? Mid A. Port forwarding — a fixed one-to-one mapping between a private and a public IP address B. Port forwarding — allowing internal hosts to reach an internal server via its public address C. Port forwarding — mapping many private hosts to one public IP by distinguishing them via port numbers D. Port forwarding — mapping an external port to an internal host so inbound connections reach it
25. What is Hairpin NAT (NAT loopback) ? Senior A. rewriting the source address of outbound packets to a shared public IP B. the public IP of a remote destination as seen on the Internet C. allowing internal hosts to reach an internal server via its public address D. public addresses are globally routable while private ones are confined to local networks
26. Which term means: "allowing internal hosts to reach an internal server via its public address"? Senior A. Static NAT B. Source NAT (SNAT) C. Inside local address D. Hairpin NAT (NAT loopback)
27. Which statement is correct? Senior A. Hairpin NAT (NAT loopback) — allowing internal hosts to reach an internal server via its public address B. Hairpin NAT (NAT loopback) — the public IP a host is translated to when reaching the Internet C. Hairpin NAT (NAT loopback) — a NAT mapping that accepts inbound packets from any external host to a mapped port D. Hairpin NAT (NAT loopback) — techniques letting peer-to-peer apps establish connections through NAT devices
28. What is Carrier-grade NAT (CGNAT) ? Senior A. large-scale NAT by ISPs sharing public IPs among many subscribers B. a fixed one-to-one mapping between a private and a public IP address C. the table tracking active mappings of inside to outside addresses and ports D. rewriting the destination address to redirect inbound traffic to an internal host
29. Which term means: "large-scale NAT by ISPs sharing public IPs among many subscribers"? Senior A. Carrier-grade NAT (CGNAT) B. Port forwarding C. Inside local address D. NAT64
30. Which statement is correct? Senior A. Carrier-grade NAT (CGNAT) — translation that lets IPv6-only clients reach IPv4-only servers B. Carrier-grade NAT (CGNAT) — a fixed one-to-one mapping between a private and a public IP address C. Carrier-grade NAT (CGNAT) — allowing internal hosts to reach an internal server via its public address D. Carrier-grade NAT (CGNAT) — large-scale NAT by ISPs sharing public IPs among many subscribers
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