Exam JN0-348 topic 1 question 66 discussion

check this for the complete snippet https://www.freecram.com/question/Juniper.JN0-347.v2018-05-21.q75/click-the-exhibit-button-referring-to-the-exhibit-router-1-and-router-2-are-failing-to-form-an-is#

Actually it's D, overload just makes the other routers not transit through the router

It’s A ISIS doesn’t care about subnet mask Overloading means the router is costed out

D is correct. Maybe Level 2 is disabled on R1 but it is still enabled on R2. So R2 is Level 1 + Level 2

There are two interfaces with ISO addresses on Router-1, and they have different area IDs, 002 and 003. Only one interface on Router-1 need to have an ISO address.

I can't be D. ISO address are not in the same area and level 2 is disabled on router-1. So, you have to change the ISO area values to match on both routers. So it's C !

Are we supposed to see a topology with this question?

To configure IS-IS, you must enable IS-IS on the interfaces and configure a NET address on one of the device interfaces (preferably, the lo0 interface) by setting family iso address net-address on the interface You must configure the ISO family on all interfaces that are supporting the IS-IS protocol by setting family iso on the interface. This means that IS-IS related frames are not discarded by the routing devices.