APPENDIX B: IS-IS

Question 1

16 - Which two events trigger an IS-IS LSP to be sent to a neighboring IS (Choose Two)

A. When a new IS-IS neighbor is detected.
B. When the cost of link to an existing IS-IS neighbor has changed.
C. When a CSNP requests missing information.
D. When a device dos not receive an expected IIH PDU.

Answer 1

A. When a new IS-IS neighbor is detected.

B. When the cost of link to an existing IS-IS neighbor has changed.

Question 2

17 - What does the attached bit in an IS-IS PDU indicate?

A. The L1/L2 router is exporting a default route into the area.
B. The L1/L2 router has reachability information to another IS-IS area.
C. The L1/L2 router is sending information from Level 2 toward Level 1.
D. The L1/L2 router is sending information from Level 1 towards Level 2.

Answer 2

B. The L1/L2 router has reachability information to another IS-IS area.

Question 3

18 - On a broadcast network, which three statements are true about IS-IS adjacencies?

A. Peers send full copies of databases at regular intervals.
B. IIH PDUs are used as a keep alive mechanism.
C. Peers can request missing link-state information.
D. An elected DIS retains its status as long as the device remains up.
E. Peers acknowledge receipt of link-state updates.

Answer 3

B. IIH PDUs are used as a keep alive mechanism.
C. Peers can request missing link-state information.
E. Peers acknowledge receipt of link-state updates.

Question 4

19 - Which two prerequisites does IS-IS need to operate? (Choose two)

A. IS-IS must be able to communicate between devices using IP.
B. IS-IS must be able to communicate using CLNS.
C. IS-IS Must have a valid IP address configured on the loopback.
D. IS-IS must have a valid CLNS address.

Answer 4

B. IS-IS must be able to communicate using CLNS.

D. IS-IS must have a valid CLNS address.

Question 5

20 - You configure a metric of 200 on an IS-IS enabled interface on Router-1. When you examine the routing table entry for that link on another IS-IS device, you see a metric of 67. What would explain this behavior?

A. Router-1 is sending both standard and wide metrics.
B. Router-1 is sending only wide-metrics.
C. Router-1 has a metric multiplier set.
D. Router-1 has a configured reference bandwidth.

Answer 5

A. Router-1 is sending both standard and wide metrics.

Question 6

86 - Which communication protocol does IS-IS use?

A. CLNP
B. LACP
C. STP
D. L2TP

Answer 6

B. LACP