CISCO CCNA Certifications: CCNA 2:Module 10
http://cisco-ccna-certifications.blogspot.com/2008/08/ccna-2module-10.html[10/29/2008 3:52:20 PM]
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1. Refer to the exhibit. When Router D is configured to
use a link-state routing protocol and is added to the
network, what is the first thing that it does to begin
learning the network topology?
It learns about its directly connected networks when its
interfaces reach the up state.
2. What two events will cause a link state router to
send LSPs to all neighbors? (Choose two.)
whenever the network topology changes
upon initial startup of router or routing protocol
3. What is the final step in the link state routing
process?
SPF computes best path to each destination network
4. What two statements correctly describe the link
state routing process? (Choose two.)
each router in the area floods LSPs to all neighbors
all routers in the area have identical link state databases
5. Refer to the exhibit. What kind of information would
be seen in an LSP sent from router JAX to router ATL?
cost of the link
6. What feature do modern link-state protocols provide
to minimize processing and memory requirements?
splitting routing topologies into smaller areas
7. To achieve network convergence, what three steps
does each link state router take? (Choose three.)
build a Link State Packet (LSP) containing the state of each
directly connected link.
flood the LSP to all neighbors, who then store all LSPs
received in a database.
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CISCO CCNA Certifications: CCNA 2:Module 10
http://cisco-ccna-certifications.blogspot.com/2008/08/ccna-2module-10.html[10/29/2008 3:52:20 PM]
construct a complete map of the topology and compute the
best path to each destination network.
8. What speeds up convergence in a network using link-
state routing?
updates triggered by network changes
9. Why is it difficult for routing loops to occur in
networks that use link-state routing?
Each router builds a complete and synchronized view of the
network.
10. What are some of the advantages of using a link-
state routing protocol instead of a distance vector
routing protocol? (Choose two.)
Routers have direct knowledge of all links in the network and
how they are connected.
After the inital LSA flooding, they generally require less
bandwidth to communicate changes in a topology.
11. Which algorithm is run by link-state routing
protocols to calculate the shortest path to destination
networks?
Dijkstra
12. Refer to the exhibit. Which statement correctly
describes the path traffic would take from the
10.0.0.0/24 network to the 192.168.1.0/24 network if
a link-state routing protocol was in use?
BOS -> ORL -> JAX -> ATL because this path is the lowest
cost
13. Which database or table must be identical on all
link-state routers within an area in order to construct
an accurate SPF tree?
link-state database
14. Which two routing protocols use Dijkstra’s shortest
path first algorithm? (Choose two.)
IS-IS
OSPF
15. When are link-state packets sent to neighbors?
when a link goes up or down
16. Refer to the exhibit. What does JAX do with link-
state packets from ORL?
sends out the individual link-state packets out the interface
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CISCO CCNA Certifications: CCNA 2:Module 10
http://cisco-ccna-certifications.blogspot.com/2008/08/ccna-2module-10.html[10/29/2008 3:52:20 PM]
connected to BOS
17. A new network administrator is given the task of
selecting an appropriate dynamic routing protocol for a
software development company. The company has over
100 routers, uses CIDR and VLSM, requires fast
convergence, and uses both Cisco and non-Cisco
equipment. Which routing protocol is appropriate for
this company?
OSPF
18. What action does a link-state router take
immediately upon receipt of an LSP from a neighboring
router?
floods the LSP to neighbors
19. Refer to the exhibit. If all routers and interfaces are
configured to use a link-state routing protocol, from
which routers will router D receive hello packets?
B and C
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