A network engineer is configuring a router to forward traffic between two subnets. The router receives a packet with a destination IP address that is not on any directly connected network. What must the router do first?

Look up the destination IP in its routing table to find the next hop

Flood the packet out all interfaces

Send an ARP request for the destination IP address

Drop the packet and send an ICMP unreachable message

What is the primary function of the Address Resolution Protocol (ARP)?

To resolve a hostname to an IP address for name resolution.

To resolve a MAC address to a hostname for identification.

To resolve a MAC address to an IP address for reverse lookup.

To resolve an IP address to a MAC address for local network communication.

A network engineer is configuring IPv6 on a router interface. The router needs to respond to Neighbor Solicitation messages for its own IPv6 address. Which address must the router have to participate in NDP?

A link-local address (fe80::/10)

A global unicast address (2000::/3)

Which protocol performs the IPv6 equivalent of ARP?

Internet Control Message Protocol (ICMP)

Dynamic Host Configuration Protocol (DHCP)

Neighbor Discovery Protocol (NDP)

Juniper NetworksCertified Associate, Junos

Domain 1Objective 4

Layer 2 and Layer 3 Addressing JN0-105 Practice Questions (Page 2)

Part of the Networking Fundamentals domain, which makes up ~24% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~8–14 in this domain), expect 1–1 from this objective — we provide 21 practice questions to prepare you well beyond it. (estimate)

21questions here

5free pages

3concepts

Questions 6–10

6application · medium
A network engineer is configuring a router to forward traffic between two subnets. The router receives a packet with a destination IP address that is not on any directly connected network. What must the router do first?
Select an answer first
7foundation · easy
What is the primary function of the Address Resolution Protocol (ARP)?
Select an answer first
8application · medium
A network engineer is configuring IPv6 on a router interface. The router needs to respond to Neighbor Solicitation messages for its own IPv6 address. Which address must the router have to participate in NDP?
Select an answer first
9application · easy
A network engineer is configuring IPv6 on a new segment. Hosts on this segment need to discover each other's link-layer addresses automatically. Which protocol must be enabled for this to work?
Select an answer first
10foundation · easy
Which protocol performs the IPv6 equivalent of ARP?
Select an answer first

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