Free Nokia 4A0-112 Exam Dumps Questions & Answers

Refer to the exhibit.

In the diagram, all routers are using IS-IS as their routing protocol. The number next to each link is its metric value.
What path will traffic follow from router R1 to router R7, and from router R7 to router R1?

• A.  Router R1 to router R7 will follow (R1-R2-R4-R6-R7). Router R7 to router R1 will follow (R7-R6-R4-R2-R1).
• B.  Router R1 to router R7 will follow (R1-R2-R4-R6-R7). Router R7 to router R1 will follow (R7-R6-R5-R3-R1).
• C.  Router R1 to router R7 will follow (R1-R3-R5-R6-R7). Router R7 to router R1 will follow (R7-R6-R4-R2-R1).
• D.  Router R1 to router R7 will follow (R1-R3-R5-R6-R7). Router R7 to router R1 will follow (R7-R6-R5-R3-R1).

Which of the following statements about router interfaces on a Nokia 7750 SR is FALSE?

• A.  They can be logical or physical.
• B.  They can be assigned IPv4 and/or IPv6 addresses.
• C.  The system interface exists by default.
• D.  They can be used in pairs on the same subnet for redundancy.

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?

• A.  Broadcast Hello messages identify the elected designed IS (DIS) and point-to-point Hello messages do not.
• B.  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.
• C.  The multicast MAC addresses to which the Hello messages are sent are different on broadcast interfaces and on point-to-point interfaces.
• D.  The neighbors are identified using their interface MAC addresses on broadcast Hello messages and using their system IDs on point-to-point Hello messages.

When multiple routing protocols offer a route for the same prefix, what part of the router is in charge of deciding which route to make active?

• A.  The routing information base (RIB)
• B.  The equal cost multipath configuration
• C.  The routing table manager (RTM)
• D.  The forwarding information base (FIB)

A router running a link-state routing protocol detects that one of its neighbors is no longer connected to it. The router generates a new link-state advertisement to inform other routers of the topology change. Which of the following is NOT an action that is triggered by this event?

• A.  Every router that receives the new link-state advertisement runs the SPF algorithm to recalculate its shortest-path tree and its forwarding database.
• B.  If a router receives multiple copies of the new link-state advertisement, it will simply ignore all copies received after the first one.
• C.  Every router that receives the new link-state advertisement updates its age field before forwarding it.
• D.  If a router receives the new link-state advertisement, it acknowledges it, stores it, and forwards it to its own neighbors.