Which two statements are correct regarding similarities and differences between IPv4 and IPv6 packet headers? (Choose two.)

The first statement is accurate because the Time-to-Live (TTL) field in IPv4 serves the purpose of limiting the lifespan of a packet in the network; it ensures that packets do not circulate indefinitely. This field is replaced by the Hop Limit field in IPv6, which performs the same function but with a different name. This change reflects an evolution in naming conventions and a streamlining of the packet handling process.

The second correct statement, which is not explicitly identified in your provided answer, is that both protocols include a Source Address field. This indicates that both IPv4 and IPv6 are designed to specify the origin of the packet, which is essential for the routing and delivery of data across networks. Both types of headers utilize this information to manage communications between devices on a network effectively.

Understanding these similarities and differences is crucial, especially as networks continue to transition from IPv4 to IPv6, and recognizing the specific roles of these fields can greatly aid in grasping how packet management functions in both types of IP protocols.