You are monitoring the control plane traffic using a network analyzer on an Ethernet network
segment with all routers configured with IS-IS routing. Which two statements are true? (Choose
two.)
A.
DIS will send hellos more frequently than other IS-IS devices.
B.
L1 and L2 hellos are combined in a single hello packet.
C.
PSNPs are sent periodically.
D.
Only the DIS will send CSNPs periodically.
Explanation:
Default: 3 seconds (for designated intermediate system [DIS] routers), 9 seconds (for non-DIS routers)
1
0
Complete sequence number PDU CSNP
1
0