Which Two Statements Are True About IS-IS Levels? (Choose Two

question 20

Multiple Choice

Which two statements are true about IS-IS levels? (Choose two.)

• A) Level 1 systems use a default route to reach AS external routes located in other areas.
• B) Level 2 systems must use the loopback address as a part of the ISO network address.
• C) Level 1 systems only from adjacencies with other systems that have different area IDs.
• D) Level 2 systems do not advertise Level 2 routes into a Level 1 area by default.

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