642-902 Q&A – Implement a multi-area OSPF Network (26-30)

Section 2 – Implement a multi-area OSPF Network, given a network design and a set of requirements

QUESTION NO: 26
Refer to the diagram. Which OSPF configuration command is required to configure Area 3 as a totally stubby area?

image

A. On the ABR
router ospf 10
area 3 stub
B. On all Area 3 routers
router ospf 10
area 3 stub
C. On all Area 3 routers
router ospf 10
area 3 stub no-summary
D. On the ABR
router ospf 10
area 3 nssa
E. On the ABR
router ospf 10
area 3 stub no-summary
Answer: E

QUESTION NO: 27
Refer to the exhibit. Which three statements accurately describe the result of applying the exhibited route map? (Choose three.)

image
A. The map prohibits the redistribution of all type 2 external OSPF routes.
B. All routes that do no match clauses 10 and 20 of the route map are redistributed with their tags set to 8.
C. The map prohibits the redistribution of all external OSPF routes with tag 6 set.
D. The map permits the redistribution of all type 1 external OSPF routes.
E. The map redistributes into EIGRP all routes that match the pfx prefix list and the five metric values?0000, 1000, 255, 1, and 1500.
F. The map prohibits the redistribution of all type 2 external OSPF routes with tag 6 set.
Answer: B,D,F
Explanation:
The route-map command is used to configure policy routing, which is often a complicated task. A route map is defined using the syntax shown in the figure.
Syntax:

RouterA(Config)#route-map map-tag [permit | deny ] <Sequence Number>
RouterA(Config-map-router)#

The map-tag is the name, or ID, of the route map. This map-tag can be set to something easily recognizable name. The route-map command changes the mode on the router to the route-map configuration mode, from there conditions can be configured for the route map.
In this example, the first route-map entry (10) will deny all type 2 routes with a tag of 6 (both must be true).
The second route map (20) will set the metrics for all routes matching the pfx prefix list. Choice A is incorrect because the metrics shown do not need to match. These metrics will be assigned to the routes that match.
The last route-map (30) will set all other routes that did not already match 10 or 20 with a tag of 8.

QUESTION NO: 28
Study the exhibit below carefully. In order to summarize all routes from area 0 to area 1, what must be configured on the router?

image
A.Area 0 range 172.16.96.0 255.255.224.0
B.Area 1 range 172.16.96.0 255.255.224.0
C.Area 1 range 172.16.96.0 255.255.0.0
D.Area 0 range 172.16.96.0 255.255.255.0
Answer: A

QUESTION NO: 29
RouterA#debug ip ospf events OSPF events debugging is on RouterA# 04:43:16: OSPF: Rcv pkt from 10.3.0.2, Ethernet0/1, area 0.0.0.1 mismatch area 0.0.0.2 in the header 04:43:19: OSPF: Rcv hello from 10.100.100.3 area 0 from Ethernet0/0 10.1.0.1 04:43:19: OSPF: End of hello processing Refer to the exhibits. What can be done to fix the problem? Select the best response.
A. Change router B E0/1 interface to area 0.
B. Change router A interface E0/1 to area 0.0.0.2.
C. Configure the E0/1 interfaces of router A and router B to be in area 0.
D. Shut down the E0/1 interfaces in router A and router B as OSPF does not allow "back doors" between areas.
E. Remove the E0/1 interfaces in router A and router B from the OSPF process. Use static routes to route data directly from router A to router B to avoid passing data through router C in area 0.
Answer: C

QUESTION NO: 30
Which three statements about OSPF areas are true? (Choose three.)
A. Areas introduce a boundary on the link-state updates.
B. Areas are logical definitions specific to any given router.
C. All routers within an area have the exact link-state database.
D. The calculation of the Dijkstra algorithm on a router is limited to changes within an area.
E. The area designated router will always have a priority of 0.
Answer: A,C,D

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