Refer to the exhibit. An engineer with an employee 10:4350:47:853 is implementing IS-IS as the new routing protocol in the network. All routers in the network operate as Level 2 routers in the same…

This option is incorrect because while it shares the Area ID, has a unique System ID, and the correct NSEL, it uses AFI `49`. Given that option C is the correct answer with AFI `48`, it implies AFI can differ, and `48` might be preferred in this context.

This option is incorrect because its Area ID (`0135.332b.ca14.6975.28371`) is different from R1's, and its NSEL is `10` instead of the standard `00` for a router.

For IS-IS Level 2 routers in the same area to establish adjacency, their Area ID portion of the NET address must match. R1's Area ID, derived from its NET `49.0133.532b.ca14.6915.21311.F40F.1B3a.ba10.00`, is `0133.532b.ca14.6915.21311`. Option C has the same Area ID, a unique System ID (`f40f.1626.bb98`), and the standard NSEL `00`, fulfilling the requirements. The AFI can differ (`48` vs `49`) while still allowing adjacency if the Area ID is otherwise identical.

This option is incorrect because its NSEL (`01`) is not the standard `00` for a router, even though its Area ID matches R1's and its System ID is unique.