Which OSPF areas prevent LSA type 4, LSA type 5?

[libra_ali786]

Which OSPF areas prevent LSA type 4, LSA type 5?
A. Not-so-stubby area
B. Total stubby area
C. Stubby area
D. Normal area
E. Backbone area
F. Not-so-stubby totally stub area

Required the detail explaintion regarding the answer.

[Seb Rupik · Accepted solution]

Hi there,

Stub and Totally Stubby Areas meet that requirement. Take a look at these two sources:

https://tools.ietf.org/html/rfc2328#page-37

https://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/7039-1.html#t31

cheers,

Seb.

[Deepak Kumar · Accepted solution]

Hi,

Stub areas can contain type 1, 2, and 3 LSAs. A default route is substituted for external routes.
Totally stubby areas can only contain type 1 and 2 LSAs, and a single type 3 LSA. The type 3 LSA describes a default route, substituted for all external and inter-area routes.
Not-so-stubby-areas implement stub or totally stubby functionality yet contain an ASBR. Type 7 LSAs generated by the ASBR are converted to type 5 by ABRs to be flooded to the rest of the OSPF domain.

Not-so-stubby totally stub area

This Table can help you more:

Regards,

Deepak Kumar

[Waqas Karim (CCIE)]

Stub and Totally Stubby Areas prevent LSA type 4, LSA type 5.
Please see my simple table below, hope it is helpful (3rd table in this cheatsheet): 

OSPF Cheatsheet

[Waqas Karim (CCIE)]

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@libra_ali786 wrote:

Which OSPF areas prevent LSA type 4, LSA type 5?
A. Not-so-stubby area
B. Total stubby area
C. Stubby area
D. Normal area
E. Backbone area
F. Not-so-stubby totally stub area

Required the detail explaintion regarding the answer.

---

Stub and Totally Stub Areas

[shashank840]

Hey

Answer will be STUB  and Totally Stubby Areas ,  NSSA and Total NSSA is not correct bcoz they use type 7 LSA which is actually mask of type 5 LSA