Nokia Alcatel-Lucent Interior Routing Protocols and High Availability 4A0-101 Exam Dumps: Updated Questions & Answers (October 2025)

Black hole

Default gateway

Gateway path

Proxy ARP

The router is an ABR.

The router is an ASBR.

The router is at the end of a virtual link.

The router's interface is in a stub area.

Routers R1 and R2 are in different areas,

Routers R1 and R2 are in the same area.

Routers R1 and R2 will send a Level 1 Hello PDU and Level 2 Hello PDU, if the interface type between them is point-to-point.

Routers R1 and R2 will send a Level 1 Hello PDU and Level 2 Hello PDU, if the interface type between them is broadcast.

Routers R1 and R2 will send a Level 1/2 Hello PDU, if the interface type between them is broadcast.

Different authentication types are not possible because IS-IS only supports password authentication.

An adjacency will not be formed

The two routers negotiate the authentication type and then reach the up state.

Only an L2 adjacency will form, as long as both routers are L2 capable.

The router sends a link-state update to its neighbor.

The router sends a link-state acknowledgement to its neighbor.

The router updates the information in its LSDB with the information received from its neighbor.

The router sends a link-state request to its neighbor.

The router takes no action.

Exchange

Up

Down

2-Way

L1 routers

L2 routers

L1/L2 routers

L1 and L2 routers

Link Local LSA

Router LSA

Network LSA

Inter-Area Router LSA

Intra-Area Prefix LSA

None of the above LSAs have an AS scope.

Option A

Option B

Option C

Option D

IPv4 In-Band Management

IPv6 Routing

IPv4 Multicast Routing

IPv6 Multicast Routing

All of the above are MT topologies defined for IS-IS.