Free Nokia IS-IS Routing Protocol Exam 4A0-112 Exam Practice Test

What is the replacement for ARP in IPv6?

• Duplicate address detection procedures.
• Router discovery procedures.
• Neighbor discovery procedures.
• Stateless address auto-configuration procedures.

Which component of the Nokia 7750 SR is in charge of performing the longest prefix match lookup on packets that arrive on the physical interfaces?

• Control Processing Module (CMP)
• Media Dependent Adapter (MDA)
• Switch Fabric (SF)
• Input/Output Module (IOM)

A series of actions are triggered on a router as a result of enabling both loopfree-alternate for a link- state routing protocol and ip-fast-reroute. Which of the following is NOT one of those actions?

• Calculating the shortest-path next hop for each known IP prefix.
• Calculating a backup next hop for each known IP prefix, if it exists, that would not create a routing loop if used without informing other routers.
• Installing two entries in the FIB for IP prefixes, one active and one in standby mode.
• Enabling the router to locally repair the active path to an IP prefix in case of failure.

When a router performs the SPF calculation, which router is used as the root of the shortest path tree?

• The router with the fewest links.
• The router with the lowest router ID.
• The router's closest neighbor.
• The router doing the calculation.

On a broadcast interface, an IS-IS router receives an LSP that is newer than the one on its database. Which of the following statements best describes the actions taken by the router as a consequence?

• The router sends back a copy of the LSP from its database to its neighbor.
• The router updates its database with the LSP and floods a copy to its neighbors on other interfaces.
• The router updated its database with the LSP, acknowledges the LSP with a PSNP, and floods a copy to its neighbors on other interfaces.
• The router updates its database with the LSP and acknowledges it with a PSNP.

There are several differences between IS-IS Hello packets used on broadcast interfaces and on point- to-point interfaces.Which of the following statements is FALSE?

• On broadcast interfaces there are different Hello packet types for level-1 and level-2 adjacencies, whereas on point-to-point interfaces there is a single Hello packet type.
• The multicast MAC addresses to which the Hello messages are sent are different on broadcast interfaces and on point-to-point interfaces.
• The neighbors are identified using their interface MAC addresses on broadcast Hello messages and using their system IDs on point-to-point Hello messages.
• Broadcast Hello messages identify the elected designed IS (DIS) and point-to-point Hello messages do not.

Two IS-IS routers are exchanging Hello packets. One is configured to use authentication and the other is not. Which of the following statements is TRUE?

• An adjacency will be established with authentication using the default parameters defined for IS- IS routers.
• The two routers will negotiate the authentication parameters and the establish an adjacency.
• An adjacency will be established without authentication.
• An adjacency will not be established.

Which of the following statements regarding the databases used by a link-state routing protocol in a single-are routing domain is FALSE?

• The link-state database has the local topology and IP reachability information advertised by all the routers.
• The adjacency database contains information about all the links interconnecting the domain’s
• routers.
• The forwarding database contains the optimum next hop for each known prefix.
• The link-state database is the same for all routers.

Which of the following statements about the IP forwarding process on a router is TRUE?

• It uses the routing table to find a match for the source IP address.
• It uses the routing table to find a match for the destination IP address.
• It uses the ARP table to find a match for the source MAC address.
• It uses the ARP table to find a match for the destination MAC address.

Which of the following is a valid alternative representation of the IPv6 address 2001:0da8:0000:0000:0024:0000:4ab9:0300?

• 2001:0da8::0024:0000:4ab9:03
• 2001:da8::0:24::4ab9:300
• 2001:da8::24::4ab9:300
• 2001:da8::24:0:4ab9:300