http://ipv6.he.net/certification/

Guru technical test – not done yet, despite being sage!

1. When using auto-configuration, what is used from the host to configure the last 64bits of the IPv6 address?

  • Random number generator is used
  • Nothing on the host is used
  • The IPv4 address on the ethernet interface
  • The MAC address of the ethernet interface
  • The loopback interface IPv4 address

2.A MAC address is only 48bits. So when using auto-configuration, what is used to fill in the missing 16bits?

  • FFFF
  • FE80
  • 0
  • Nothing, a MAC is really 64bits
  • FFFE

3.On many routers, which one of the following commands is used to configure an IPv6 address on an interface?

  • ip address 2001:A:B:C::1/64
  • ipv6 address 2001:A:B:C:1
  • ipv6 address 2001:A:B:C::1/64
  • ipv6 address 2001:A:B:C:1/64

4. What is the length of an IPv6 packet header?

  • 40 bytes
  • 128 bits
  • 16 bytes
  • 32 bits

5. Which of the following organizations assigns IPv6 addresses?

  • ARIN
  • RIPE
  • APNIC
  • LACNIC
  • AFRINIC
  • All of the above

6. What protocol number is used for 6in4 IPv4 packets?

  • 41
  • 6
  • 53
  • 4

7. Which of the following is the 6to4 IPv6 prefix?

  • ff00::/8
  • 2001:0000::/32
  • 2001:db8::/32
  • 2002::/16

8. Which of the following well-known prefixes is used for Teredo?

  • 2001:0000::/32
  • 2002::/16
  • ff00::/8
  • 2001:db8::/32

9. Which of the following is an IPv4-mapped IPv6 address?

  • fe80::20c:dbff:fefb:232b
  • 2001:db8::/32
  • ::10.10.10.2
  • ::ffff:10.10.10.2

10. On operating systems that support it, IPv4-mapped IPv6 addresses are used to:

  • make it so that you have to write separate code for IPv6 socket calls and IPv4 socket calls
  • map IPv4 addresses to an IPv6 address to make it so that IPv6 socket system calls can be used with both IPv4 or IPv6 addresses
  • map IPv6 addresses to IPv4

11. Which of the following is an IPv4-compatible IPv6 address?

  • fe80::20c:dbff:fefb:232b
  • ::ffff:10.10.10.2
  • 2001:db8::/32
  • ::10.10.10.2

12. IPv4-compatible IPv6 addresses are deprecated in RFC 4291.

  • True
  • False

13. Should you ever see packets with IPv4-mapped IPv6 addresses on the wire (outside of a host)?

  • No
  • Yes

14. Which version of OSPF supports IPv6?

  • OSPFv3
  • OSPFv6
  • OSPFv0
  • OSPFv1

15. Which of the following can be used by an IPv6 host to learn the address of a default gateway?

  • stateless autoconfiguration
  • neighbor introduction protocol
  • neighbor discovery protocol
  • international autoconfiguration

16. Which of the following can be used by a host to learn its own IPv6 address?

  • neighbor discovery protocol
  • international autoconfiguration
  • neighbor introduction protocol
  • stateless autoconfiguration

17. If you translate IPv4 packets to IPv6 or IPv6 packets to IPv4, this is called:

  • 6in4
  • completely compatible with all protocols
  • nat64/dns64/ds-lite
  • not possible

18. On many routers, what command shows IPv6 routes?

  • show ipv6 ospf summary
  • show ipv6 route
  • show ipv6 bgp summary

19. On many routers, what command shows IPv6 BGP sessions?

  • show ipv6 ospf summary
  • show ipv6 bgp route
  • show ipv6 bgp summary

20. On many routers, what command shows IPv6 BGP routes?

  • sh ipv6 ospf
  • sh ipv6 bgp