Which two statements are true regarding a designated intermediate system (DIS) in an IS-IS network?

In an IS-IS network, the designated intermediate system (DIS) has a role that is akin to that of the designated router (DR) in OSPF. Both the DIS and DR are responsible for reducing the amount of routing protocol traffic within a broadcast or multi-access network segment. Specifically, the DIS is tasked with generating and distributing link state information to other routers within the same area. This helps minimize the number of necessary updates and ensures that all IS-IS routers have a consistent view of the network topology.

The DIS election process is determined by specific criteria, including the priority value assigned to each router and its system ID. In case of a tie in priorities, the router with the highest system ID is selected as the DIS. However, this is not related to the router's IP address but rather to the unique identifiers assigned within IS-IS. Consequently, the option related to the use of a router's IP address as a tiebreaker is not true. Moreover, while there is typically no backup DIS elected in the IS-IS protocol, this question asks for the statements that are true regarding the DIS; thus, only the role comparison to the DR holds validity.

These functions highlight the importance of the DIS in managing traffic