NAT and PAT Quiz

What does PAT use to track the session?

• Subnet masks

• IP addresses

• MAC addresses

• Port numbers

What does PAT do if the original source port number is already in use?

• Assign a random port number

• Assign the first available port number for the appropriate port group

• Assign the next available port number

• Assign the last available port number

What is the advantage of NAT in terms of network security?

• Increases the flexibility of connections to the public network

• Hides user private IPv4 addresses

• Provides consistency for internal network addressing schemes

• Conserve the legally registered addressing scheme

What is a disadvantage of NAT in terms of performance?

• Initiating TCP connections can be disrupted

• Tunneling becomes more complicated

• End-to-end IP traceability is lost

• End-to-end functionality is degraded

What is the purpose of IPv6 unique local addresses (ULAs)?

• To encapsulate the IPv6 packet inside an IPv4 packet

• To translate private address to public addresses

• To provide access between IPv6-only and IPv4-only networks

• To provide IPv6 address space for communications within a local site

What is the prefix of IPv6 unique local addresses (ULAs)?

• FF00::/7

• FD00::/7

• FE00::/7

• FC00::/7

What is the next bit in the prefix of IPv6 unique local addresses (ULAs) if the prefix is locally assigned?

• 3

• 2

• 1

• 0

What is the purpose of dual-stack in IPv6?

• To translate private address to public addresses

• To run protocols for both IPv4 and IPv6

• To encapsulate the IPv6 packet inside an IPv4 packet

• To provide access between IPv6-only and IPv4-only networks

What technique is used to encapsulate the IPv6 packet inside an IPv4 packet for transmission over an IPv4-only network?

• NAT for IPv6 (translation)

• Tunneling

• Dual-stack

• NAT64