8.3.6 Check Your Understanding – IPv6 Packet Answers

1. Which three options are major issues associated with IPv4? (Choose three.)

  • IP address depletion
  • increased network complexity and Internet routing table expansion
  • always on connections
  • lack of end-to-end connectivity
  • global and political boundaries
  • too many IPv4 addresses available

Explanation: IPv4 was standardized in the 1980s and has several technological limitations, such as lack of end-to-end connectivity and a depleted address space.

2. Which two options are improvements provided by IPv6 as compared to IPv4? (Choose two.)

  • header supports additional fields for complex packets
  • increased the IP address space
  • standardizes the use of NAT
  • supports class-based networks
  • uses a simpler header to provide improved packet handling

Explanation: There are several technical improvements made to IPv6, two of which are a vastly larger IP address pool and a simplified protocol header.

3. Which is true of the IPv6 header?

  • it consists of 20 octets.
  • it consists of 40 octets.
  • it contains 8 header fields.
  • it contains 12 header fields.

Explanation: The IPv6 header is a fixed length of 40 octets and contains 8 header fields.

4. Which is true of the IPv6 packet header?

  • The Hop Limit field replaces the IPv4 Time to Live field.
  • The Source and Destination IPv6 addresses change while travelling from source to destination.
  • The Time to Live field replaces the DiffServ field.
  • The Version field identifies the next header.

Explanation: Several fields in the IPv6 header replaced fields in the IPv4 header. For example, the Hop Limit field replaced the IPv4 header Time to Live field.

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