8.2: SLAAC

Question 1

Not every network has or needs access to a ____. But every device in an IPv6 network needs a GUA

Answer 1

DHCPv6 server
GUA

Question 2

The ____ enables hosts to create their own unique IPv6 global unicast address without the services of a DHCPv6 server.

Answer 2

SLAAC method

Question 3

SLAAC is a ____(stateless/stateful) service

Answer 3

stateless

Question 4

SLAAC uses ____messages to provide addressing and other configuration information that would normally be provided by a DHCP server.

Answer 4

ICMPv6 RA

Question 5

A host configures its IPv6 address based on the information that is sent in the ____.

Answer 5

RA

Question 6

RA (router advertisement) messages are sent by an IPv6 router every ___seconds.

Answer 6

200

Question 7

A host can also send a ___ message requesting that an IPv6-enabled router send the host an RA.

Answer 7

Router Solicitation (RS)

Question 8

SLAAC can be deployed as ___, or _____.

Answer 8

SLAAC only
SLAAC with DHCPv6

Question 9

Link-local IPv6 address

Answer 9

fe80::1

Question 10

GUA

Answer 10

2001:db8:acad:1::1

Question 11

subnet

Answer 11

2001:db8:acad:1::/64

Question 12

IPv6 all-nodes group

Answer 12

ff02::1

Question 13

The SLAAC only method is enabled by default when the ___ command is configured.

Answer 13

ipv6 unicast-routing

Question 14

True or False
A router can only send an RA messages every 200 seconds.

Answer 14

False
t will also send an RA message if it receives an RS message from a host.

Question 15

When a client is configured to obtain its addressing information automatically, it sends an RS message to the IPv6 all-routers multicast address of___

Answer 15

ff02::2

Question 16

IPv6 all-routers group

Answer 16

ff02::2

Question 17

Ways to generate the remainder 64-bit

Answer 17

Randomly generated
EUI-64

Question 18

The 64-bit interface ID is ____by the client operating system. This is the method now used by Windows 10 hosts.

Answer 18

randomly generated

Question 19

The host creates an interface ID using its 48-bit MAC address

Answer 19

EUI-64

Question 20

SLAAC is a stateless process; therefore, a host has the option to verify that a newly created IPv6 address is unique before ___.

Answer 20

it can be used

Question 21

The ___ process is used by a host to ensure that the IPv6 GUA is unique.

Answer 21

Duplicate Address Detection (DAD)

Question 22

DAD is implemented using_____

Answer 22

ICMPv6

Question 23

To perform DAD, the host sends an ICMPv6 ___ message with a specially constructed multicast address, called a ___

Answer 23

Neighbor Solicitation (NS)
Solicited-node multicast address.

Question 24

The Solicited-node multicast address duplicates the last ___ of IPv6 address of the host.

Answer 24

24 bits

Question 25

True or false
If no other devices respond with a NA message, then the address is virtually guaranteed to be unique and can be used by the host.

Answer 25

True
If an NA is received by the host, then the address is not unique, and the operating system has to determine a new interface ID to use.