Designated Intermediate System (DIS) JN0-364 Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   What is a primary role of the DIS in maintaining adjacencies on an IS-IS broadcast segment?

   • AIt establishes adjacencies only with routers that have lower MAC addresses
   • BIt establishes adjacencies only with the previous DIS
   • CIt establishes adjacencies only with routers that have higher priority
   • DIt establishes adjacencies with every other router on the segment
   Reveal Solution Discussion Select an answer first
2. 12application · medium

   A network administrator is troubleshooting IS-IS flooding on a broadcast segment with five routers. The administrator notices that only the DIS is sending CSNPs periodically. What is the primary reason the DIS sends CSNPs on the broadcast segment?

   • ATo synchronize the link-state databases of all routers on the segment by listing the LSPs it has in its database.
   • BTo elect a new DIS when the current DIS fails.
   • CTo establish two-way adjacencies with all non-DIS routers on the segment.
   • DTo flood the pseudonode LSP to all routers on the segment.
   Reveal Solution Discussion Select an answer first
4. 13foundation · easy

   Which adjacency does the DIS form on an IS-IS broadcast segment?

   • AFull adjacency only with routers that have higher priority
   • BFull adjacency with every other router on the segment
   • CTwo-way adjacency only with the previous DIS
   • DTwo-way adjacency with every other router
   Reveal Solution Discussion Select an answer first
5. 14foundation · easy

   In IS-IS, when does a new DIS get elected on a broadcast segment?

   • AWhen a new router with a lower MAC address joins
   • BWhen the current DIS fails
   • CWhen a router with a higher priority joins the segment
   • DWhen the DIS priority is changed on any router
   Reveal Solution Discussion Select an answer first
6. 15application · medium

   A network engineer familiar with OSPF is now configuring IS-IS on a broadcast segment with four routers. The engineer asks whether a backup DIS is needed for redundancy. What is the correct response regarding IS-IS DIS behavior compared to OSPF DR/BDR?

   • AIS-IS does not use a backup DIS; if the DIS fails, a new election occurs and the new DIS takes over.
   • BIS-IS requires a backup DIS to be manually configured on each broadcast segment.
   • CIS-IS uses the router with the second-highest MAC address as a backup DIS automatically.
   • DIS-IS uses a backup DIS that takes over immediately if the primary DIS fails.
   Reveal Solution Discussion Select an answer first