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Indicate whether the statement is true or false.
1. Neighbor Discovery uses five ICMPv6 message types.
a.
True
b.
False
2. Upon start-up, Neighbor Discovery collects information about how nodes configure their IPv6 addresses to
communicate on the network.
a.
True
b.
False
3. Home Agents may include the Home Agent Information option in their Router Advertisement messages, but
it should not be included if the Home Agent (H) bit is not set.
a.
True
b.
False
4. ND takes over the functions that ARP and Reverse ARP handled in IPv4.
a.
True
b.
False
5. Neighbor Discovery makes abundant use of messages.
a.
True
b.
False
Indicate the answer choice that best completes the statement or answers the question.
6. An ICMPv6 type 134 message is also known as which of the following?
a.
Router Solicitation
b.
Router Advertisement
c.
Neighbor Advertisement
d.
Neighbor Solicitation
7. Which of the following messages do router send to inform a host of a better first-hop router for a destination?
a.
Route Advertisement
b.
Neighbor Advertisement
c.
Route Solicitation
d.
Redirect
8. IPv6 Duplicate Address Detection protocol can be compared with which IPv4 protocol function?
a.
ARP Request
b.
Gratuitous ARP
c.
Router Advertisement
d.
Redirect
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9. Which option is used in Mobile IPv6 by mobile nodes receiving Router Advertisement messages for their
movement detection algorithm?
a.
Target Link Layer Address
b.
Redirected Header
c.
Advertisement Interval
d.
Home Agent Information
10. ND makes use of multicast addresses. Which multicast address is expressed using ff02::1?
a.
all nodes
b.
all routers
c.
all proxies
d.
all domains
11. IPv6 Neighbor Solicitation protocol can be compared with which IPv4 protocol function?
a.
ARP Request
b.
Router Solicitation
c.
Router Advertisement
d.
Redirect
12. Which of the following uses ICMPv6 type 135 messages?
a.
Router Solicitation
b.
Router Advertisement
c.
Neighbor Advertisement
d.
Neighbor Solicitation
13. What type of messages does a router send to the sender when it knows a better first-hop for a particular
destination address?
a.
Router Solicitation
b.
Router Advertisement
c.
Neighbor Advertisement
d.
Redirect
14. Which option is sent in Router Advertisement messages to provide a common MTU value for nodes on the
same network segment?
a.
Prefix Information
b.
Target Link-Layer Address
c.
Redirected Header
d.
MTU
15. When a node wants to send a packet to an on-link neighbor but the sender does not know the link-layer
address for the target node, which process is invoked by the node?
a.
Address Resolution
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b.
Duplicate Address Detection
c.
Router Discovery
d.
Redirect Function
16. IPv6 Router Advertisement protocol can be compared with which IPv4 protocol function?
a.
ARP Request
b.
Router Solicitation
c.
Router Advertisement
d.
Redirect
17. What type of message does an IPv6 node send when an interface becomes active and the node wants to find
routers connected to the local link?
a.
Router Advertisement
b.
Neighbor Advertisement
c.
Router Solicitation
d.
Neighbor Solicitation
18. ND makes use of multicast addresses. Which multicast address is expressed using ff02::2?
a.
all nodes
b.
all routers
c.
all proxies
d.
all domains
19. Routers periodically send which type of message to inform hosts of link prefixes, settings for address
autoconfiguration, link MTU, valid and preferred lifetimes, and other possible options?
a.
Router Solicitation
b.
Neighbor Advertisement
c.
Router Advertisement
d.
Neighbor Solicitation
20. When a host's interface initializes, it may send which of the following messages to determine if any IPv6
routers are on the network segment?
a.
Router Advertisement
b.
Router Solicitation
c.
Neighbor Advertisement
d.
Neighbor Solicitation
21. The Target Link-Layer Address option is used in Neighbor Advertisement and in which of the following
messages?
a.
Redirect
b.
Router Advertisement
c.
Router Solicitation
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d.
Neighbor Solicitation
22. Which of the following uses ICMPv6 type 133 messages?
a.
Router Solicitation
b.
Router Advertisement
c.
Neighbor Advertisement
d.
Neighbor Solicitation
23. In the ICMPv6 Router Solicitation message, which field is an unused field that is set to 0 by the source node
and ignored by the destination node?
a.
Reserved
b.
Options
c.
Checksum
d.
Type
24. Neighbor Discovery performs many of the functions that ICMP Router Discovery and which of the
following handled in IPv4?
a.
Neighbor Solicitation
b.
Host Discovery
c.
Node Discovery
d.
Redirect
25. An ICMPv6 type 136 message is also known as which of the following?
a.
Router Solicitation
b.
Router Advertisement
c.
Neighbor Advertisement
d.
Neighbor Solicitation
26. What process is used by nodes to discover neighbor routers on the local link, learn prefixes, configure their
default gateway, and other possible configuration parameters?
a.
Address Resolution
b.
Duplicate Address Detection
c.
Router Discovery
d.
Redirect Function
Enter the appropriate word(s) to complete the statement.
27. The ____________________ address is a multicast address with link-local scope that helps reduce the
number of multicast groups to which nodes must subscribe to make themselves available for solicitation by
other nodes on their local links.
28. A node can send a(n) ____________________ message to find (or verify) the link-layer address of a local
node, to see if a node is still available, or to check that its own address is not already in use by another node.
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29. Routers send ____________________ messages to inform a host of a better first-hop router for a
destination.
30. Routers reply to Router Solicitation messages received by a node using ____________________ messages.
31. A router might also use ____________________ messages to balance traffic loads across multiple
interfaces.
Match each item with a statement below.
a.
Neighbor Discovery
b.
Duplicate Address Detection
c.
Neighbor Solicitation
d.
Router Advertisement
e.
Neighbor Advertisement
f.
unspecified address
g.
Redirect
h.
Router Solicitation
i.
solicited-node address
32. a protocol in IPv6 that permits nodes and routers on a local link to keep one another updated about any
recent change in their network connectivity or status
33. a method for checking the IPv6 address that a node wishes to use by sending a Neighbor Advertisement
message to see if it is already in use by some other node
34. messages used to find (or verify) the link-layer address for a local node, to see if that node is still available,
or to check that an address is not in use by another node
35. a message sent out by a router which contains its own link-layer address, the network prefix of the local
subnet, the MTU for the local link, suggested hop limit values, and other parameters useful for nodes on the
local link
36. messages sent by nodes that include their IPv6 and link-layer addresses to maintain information about local
addresses and on-link status
37. a reserved address used as a source address if a node does not have an assigned IPv6 address
38. a message sent out by a router to inform a sending node that there is a better first-hop router to access a
destination node that is off-link
39. a message sent out by a node to ask routers connected to a local link to identify themselves by immediately
sending a Router Advertisement message rather than waiting for the next scheduled advertisement to appear
40. a multicast address with link-local scope, which helps reduce the number of multicast groups to which nodes
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must subscribe in order to make themselves available for solicitation by other nodes on their local links
41. Briefly describe the following ICMPv6 message types: Neighbor Solicitation and Neighbor Advertisement.
42. What information does an IPv6 Router Advertisement message contain for Ethernet interfaces?
43. What information does an IPv6 Neighbor Solicitation message contain for Ethernet interfaces?
44. What information does an IPv6 Router Solicitation message contain for Ethernet interfaces?
45. Briefly describe the following ICMPv6 message types: Router Solicitation, Router Advertisement, and
Redirect.
46. What are the five stages for a neighbor cache entry defined in RFC 4861?
47. Briefly describe the conceptual sending algorithm.
48. What neighbor data should be stored on a host?
49. What is a conceptual host model?
50. What are the processes involved with Neighbor Discovery?
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Answer Key
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chapter 6
