Grand Quiz for the IPv6 literate.

How many hexadecimal blocks does IPv6 contain in total ?

• 8 total blocks of 32 total Hexbits

• 10 blocks of

  40 total Hexbits

• 6 blocks of

  24 total Hexbits

• 12 blocks of

  48 total Hexbits

Answer explanation

For IPv6,

0000:0000:0000:0000:0000:0000:

0000:0000 is the standard format.

Thus,

32 is the total number of hexadecimal bits.

Which of the following is the correct way of omitting zeroes in 2001:0db8:102A:0a0b:f00a:0010:: ?

• 2001:db8:102A:

  0a0b:f00a:0010::

• 2001:db8:12A:

  ab:fa:1::

• 2001:db8:102A:

  a0b:f00a:10::

• 2001:db8:102A:

  ab00:fa:10::

Answer explanation

Only the leading zeroes can be omitted/removed, the rest can not.

0db8 = db8

0a0b = a0b

0010 = 10

Pick a "Double colon" {::} replacement example from the following.

• 2001:db8:cafe:1:0:0:0:1

  into

  2001:db8:cafe:1::1

• 2001:db8:cafe:0:ff:fe:1:1

  into

  2001:db8:cafe:ff:fe::1

• 2001:db8:cafe:1:0:0:0:1

  into

  2001:db8:cafe::1::1

• 2001:db8:cafe:1:0:0:0:1

  into

  2001::1

Answer explanation

A double colon (::) can replace any single, contiguous string of one or more 16-bit hextets consisting of all zeros.

This means only the 0:0, 0:0:0, 0:0:0:0 portion of the IPv6 can be converted into ::

Routers sends RS information to hosts and hosts send RA information to routers.

• True

• False

Answer explanation

Router Solicitation (RS) is a message sent by an IPv6 host to request configuration information from a router and Router Advertisement (RA) is a message sent by an IPv6 router to advertise itself in the network and reply configuration information to hosts.

How does SLAAC determine the network prefix used for IPv6 addresses?

• It is manually configured by the network administrator

• It is obtained from a Dynamic Host Configuration Protocol (DHCP) server

• It is included in the Router Advertisement (RA) message

• It is randomly generated by the host device

Answer explanation

SLAAC is possible through Router Advertisement due to a lack of dedicated DHCP, as such all information within the protocol to configure IPv6 address is provided by the router itself.

Which type of message is sent in response to a Router Solicitation (RS) message ?

• Router Discovery (RD)

• Router Advertisement (RA)

• Neighbor Solicitation (NS)

• Neighbor Advertisement (NA)

What is the purpose of Router Advertisement (RA) ?

• To request configuration information from a neighboring router

• To advertise the presence of a router and provide configuration information to hosts

• To discover the host's own IPv6 address

• To authenticate the identity of network devices

Answer explanation

Router Advertisement provides information with regards to both presence of router to neighbor devices and IPv6 configuration information to hosts.

Which of the following is not a valid IPv6 address configuration option using DHCPv6 ?

• Stateful address configuration

• Prefix based configuration (Pooling)

• Stateless address autoconfiguration (SLAAC)

• Static/Manual configuration

Answer explanation

Manual configuration the opposite for DHCPv6. Manual configuration is a static configuration method where the network administrator manually configures the IPv6 addresses on each device while, DHCP is automatic/dynamic.

What is the correct command to configure Dynamic Host Configuration Protocol in a router CLI ?

• configure dhcp

• internet protocol dhcp pool

• dhcp terminal

• ipv6 dhcp pool

Answer explanation

Since we are working with IPv6 addressing, the command begins with IPv6 and the protocol is selected.

What does the command "ipv6 unicast-routing" achieve ?

• Enables forwarding of Router Advertisement packets from router.

• Enables receiving of IPv6 unicast data packets.

• Enables forwarding of IPv6 unicast data packets.

• None of the above.