CCIE Certification Question of the Week - JULY1307

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LAST WEEK'S ANSWER:
Answer: b

Issues:
What is the meaning of this parameter? What is the default value and what
does the default mean?

Solutions:
Specifying the infinity keyword causes the router never to move to the
shortest-path tree (SPT); it remains on the shared tree. The default for
this value is 0. 0 causes the router to join the SPT immediately upon the
first data packet it receives.

More Information:
How to Optimize PIM Sparse Mode in a Large IP Multicast Deployment
http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cg/him
c_c/mcboptim.htm#wp1054079

LAST WEEK'S QUESTION:
7.12.1 You notice the command ip pim spt-threshold infinity used in the
multicast configuration on a router in your infrastructure. What does the
infinity keyword do?

a. It allows unlimited multicast streams to use the shortest-path tree
b. It causes the router never to move to the shortest-path tree
c. It causes the router to join the shortest-path tree immediately upon
the first data packet it receives
d. None of these options are correct
 

THIS WEEK'S QUESTION:
4-13-2. Examine the router output shown in the Exhibit. Which type of
area is this router most likely residing in?

a. NSSA
b. Totally Stubby
c. Stub
d. Normal - Backbone
e. Normal - Nonbackbone
 
Exhibit 1
R2#show ip ospf database

 

            OSPF Router with ID (172.16.1.2) (Process ID 1)

 

                Router Link States (Area 20)

 

Link ID         ADV Router      Age         Seq#       Checksum Link
count

172.16.1.2      172.16.1.2      342         0x80000002 0x009185 2

172.16.1.6      172.16.1.6      344         0x80000001 0x00C020 2

 

                Summary Net Link States (Area 20)

 

Link ID         ADV Router      Age         Seq#       Checksum

10.10.10.10     172.16.1.6      339         0x80000001 0x008A85

16.16.16.0      172.16.1.6      339         0x80000001 0x000CFC

 

                Summary ASB Link States (Area 20)

 

Link ID         ADV Router      Age         Seq#       Checksum

172.16.1.1      172.16.1.6      27          0x80000001 0x00A5D3

 

                Type-5 AS External Link States

 

Link ID         ADV Router      Age         Seq#       Checksum Tag

100.100.100.0   172.16.1.1      32          0x80000001 0x002A8A 0

R2#

 

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