On a broadcast IS-IS network, a DIS needs to be elected to create and update...

Comprehensive and Detailed in-depth Step-by-Step Explanation:

In an Intermediate System to Intermediate System (IS-IS) network, a Designated Intermediate System (DIS) is elected on broadcast networks to perform the following functions:

Represent the broadcast network as a pseudonode.

Generate and update the Link State Protocol Data Units (LSPs) for the pseudonode.

The DIS is elected based on the DIS priority value, which is configured on IS-IS interfaces. If two routers have the same priority, the router with the higher MAC address becomes the DIS.

The default DIS priority for IS-IS interfaces is 64 , which can be modified depending on the network requirements.

Option A (200): Incorrect. This is not the default value.

Option B (64): Correct. This is the default DIS priority value.

Option C (1): Incorrect. This is not the default value.

Option D (100): Incorrect. This is not the default value.