Refer to the exhibit.
Which two configuration options can be used to optimize the IS-IS network scenario?
| A. |
Change the R1 and R2 IS type to Level 2. | |
| B. |
Change the R1 and R2 IS type to Level 1. | |
| C. |
Change the gi0/0 interface IS-IS circuit type on R1 and R2 to Level 2 only. | |
| D. |
Change the gi0/1 interface IS-IS circuit type on R1and R2 to Level 1. | |
| E. |
Change the IS type for all the routers to Level-1-2. | |
| F. |
Change the IS-IS network type for all the routers to point-to-point. |