Referring to the exhibit, which LSA type is used to advertise 192.168.1.0/24 to R5?

The correct answer is A. Type 5. Area-1 has no external connections. However, Area-1 has static route (172.16.31.0/24) that are not internal OSPF route. You can limit the external route advertisements to the area and advertise the static routes by designating the area an NSSA. In an NSSA, the ASBR (vMX1)…

Advanced OSPF

Question

Exhibit

Options

AType 5
BType 4
CType 3
DType 7

How the community answered

(54 responses)

A
72% (39)
B
15% (8)
C
9% (5)
D
4% (2)

Explanation

Area-1 has no external connections. However, Area-1 has static route (172.16.31.0/24) that are not internal OSPF route. You can limit the external route advertisements to the area and advertise the static routes by designating the area an NSSA. In an NSSA, the ASBR (vMX1) generates NSSA external (Type 7) LSAs and floods them into the NSSA, where they are Type-7 LSAs allow an NSSA to support the presence of ASBR and their corresponding external routing information. The ABR (vMX2) converts Type-7 LSAs into Type-5 External LSAs and leaks them to the other areas, but external routes from other areas are not advertised within the NSSA. An admin should check this and change it. protocols-ospf.html

Topics

#OSPF LSA types#Type 5 LSA#ASBR#external routes

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