To provide areas in the network for routers that are not running OSPF
To ensure that an area is used to connect the network to the Internet
To reduce SPF calculations
To reduce use of memory and processor resources
to simplify configuration
autosummarization
the use of multiple areas
frequent SPF calculations
the election of designated routers
Type 3 LSAs are known as autonomous system external LSA entries.
Type 3 LSAs are generated without requiring a full SPF calculation.
Type 3 LSAs are used for routes to networks outside the OSPF autonomous system.
Type 3 LSAs are known as router link entries.
Type 3 LSAs are used to update routes between OSPF areas.
They usually have many local networks attached.
They both run multiple routing protocols simultaneously.
They are required to perform any summarization or redistribution tasks.
They are required to reload frequently and quickly in order to update the LSDB.
type 1
Type 2
Type 3
Type 5
Type 1
Type 2
Type 3
Type 4
The entry for 172.16.200.1 represents a loopback interface.
The routing table contains routes from multiple areas.
To reach network 172.16.2.0, traffic will travel through the GigabitEthernet0/0 interface.
The routing table contains two intra-area routes.
To reach network 192.168.1.0, traffic will exit via the Serial0/0/0 interface.
O
O IA
O E1
O E2
C
O
O E2
O IA
The network was learned from a router within the same area as R2.
The network was learned through summary LSAs from an ABR.
The network can be reached through the GigabitEthernet0/0 interface.
This network should be used to forward traffic toward external networks.
Verify OSPF.
Configure OSPF.
Define the OSPF parameters.
Gather the required parameters.
Troubleshoot the configurations.
Define the network requirements.
192.168.31.0/24
192.168.33.0/24
192.168.37.0/24
192.168.35.0/24
192.168.36.0/24
192.168.38.0/24
The route was manually configured.
The route was learned from within the area.
The route was learned from outside the internetwork.
The route was learned from another area.
10.0.4.0 255.255.0.0
10.0.0.0 255.255.240.0
10.0.4.0 255.255.248.0
10.0.8.0 255.255.248.0
Area 0 range 172.16.8.0 255.255.255.248
area 0 range 172.16.8.0 255.255.248.0
area 15 range 172.16.8.0 255.255.248.0
Area 15 range 172.16.8.0 255.255.255.248
The default route is not redistributed correctly from router R1 by OSPF.
The interface that is connected to the ISP router is down.
The OSPF network statements are misconfigured on routers R2 and R3.
The OSPF timers that are configured on routers R1, R2, and R3 are not compatible.
The network statement is misconfigured on router R1.
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