10.3.3 IPv6 Addressing Quiz Answers

10.3.3 IPv6 Addressing Quiz Answers. Networking Basics Module 10 quiz exam answers

1. What is an advantage of using IPv6 ?

  • more addresses for networks and hosts
  • faster connectivity
  • higher bandwidth
  • more frequencies

Explanation: An IPv6 address is comprised of 128 bits as opposed to 32 bits in an IPv4 address. Thus it offers far more addresses for networks and hosts than an IPv4 address does.

2. What was the reason for the creation and implementation of IPv6?

  • to make reading a 32-bit address easier
  • to relieve IPv4 address depletion
  • to provide more address space in the Internet Names Registry
  • to allow NAT support for private addressing

Explanation: IPv4 addressing space is exhausted by the rapid growth of the internet and the devices connected to the internet. IPv6 expands the IP addressing space by increasing the address length from the 32 bits to 128 bits, which should provide sufficient addresses for future internet growth needs for many years to come.

3. Which letter represents the hexadecimal value of the decimal number 15?

  • f
  • g
  • h
  • b

Explanation: The hexadecimal numbers are 0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,f. The hexadecimal number 0 represents 0 in decimal and is represented as 0000 in binary. The hexadecimal number f represents 15 in decimal.

4. A PC is configured with both an IPv4 and IPv6 address on the same network adapter. What IPv4 and IPv6 coexistence strategy is implemented on the PC?

  • Dual stack
  • NAT64
  • Tunneling
  • NAT

Explanation: When a device is configured with both IPv4 and IPv6 protocol stacks, the device is implementing a dual stack strategy.

5. What are two methods that can be used to shorten the IPv6 address notation? (Choose two.)

  • use of a double colon (::) to represent a string of all zero hextets
  • omit all leading zeros from all hextets in the address
  • remove all trailing zeros contained in the IPv6 address
  • use double colons to represent a string of the same non-zero value

Explanation: To help reduce the notation of IPv6 addresses a double colon (::) can replace any single, contiguous string of one or more 16-bit hextets consisting of all zeros. In addition, all leading zeros can be omitted from any hextet in the notation.

6. Which network migration technique encapsulates IPv6 packets inside IPv4 packets to carry them over IPv4 network infrastructures?

  • encapsulation
  • translation
  • dual-stack
  • tunneling

Explanation: The tunneling migration technique encapsulates an IPv6 packet inside an IPv4 packet. Encapsulation assembles a message and adds information to each layer in order to transmit the data over the network. Translation is a migration technique that allows IPv6-enabled devices to communicate with IPv4-enabled devices using a translation technique similar to NAT for IPv4. The dual-stack migration technique allows IPv4 and IPv6 protocol stacks to coexist on the same network simultaneously.

7. What does a double colon (::) represent in an IPv6 address notation?

  • a continuous string of one or more hextets that contain only zeros
  • at least eight occurrences of the same non-zero value
  • the boundary between the network portion and the host portion of the address
  • the beginning of the MAC address assigned to the IPv6 device

Explanation: To help reduce the notation of IPv6 addresses a double colon (::) can replace any single, contiguous string of one or more hextets consisting of all zeros. Only one instance of the double colon can be used in any IPv6 notation.

8. IPv6 increases the IP address size from 32 bits to how many bits?

  • 64
  • 96
  • 128
  • 192
  • 256

Explanation: IPv6 increases the size of the address from 32 bits in IPv4 to 128 bits.

9. Which technology enables devices in an IPv6-only network to communicate with devices in an IPv4-only network?

  • NAT64
  • tunneling
  • DHCP
  • link-local addressing

Explanation: NAT64 can be used on a router to translate an IPv6 address to an IPv4 address and to translate an IPv4 address to an IPv6 address. This technology enables the devices to communicate, even though they use different versions of IP.

10. Which IPv6 address notation is valid?

  • 2001:0DB8::ABCD::1234
  • ABCD:160D::4GAB:FFAB
  • 2001:DB8:0:1111::200
  • 2001::ABCD::

Explanation: IPv6 addresses are represented by 32 hexadecimal digits (0-9, A-F). The size of the notation can be reduced by eliminating leading zeroes in any hextet and by replacing a single, contiguous string of hextets containing all zeroes with a double colon, which can only be used one time.

11. Which two statements are correct about IPv4 and IPv6 addresses? (Choose two.)

  • IPv6 addresses are represented by hexadecimal numbers.
  • IPv4 addresses are represented by hexadecimal numbers.
  • IPv6 addresses are 32 bits in length.
  • IPv4 addresses are 32 bits in length.
  • IPv4 addresses are 128 bits in length.
  • IPv6 addresses are 64 bits in length.

Explanation: IPv4 addresses are represented as dotted decimal numbers and are 32 bits in length. IPv6 addresses are represented by hexadecimal numbers and are 128 bits in length.

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