About the Exam

Specialist-level Juniper certification for enterprise routing and switching on Junos. It covers OSPF and BGP, spanning tree, layer 2 switching and VLANs, IP multicast, routing policy and firewall filters, and high-availability and troubleshooting techniques in an enterprise network. Passing demonstrates intermediate hands-on capability with Junos in enterprise environments.

Exam Topics

Layer 2 Switching/VLANs12–16%
Spanning Tree8–12%
Layer 2 Security8–12%
Protocol Independent Routing8–12%
OSPF16–20%
IS-IS10–14%
BGP16–20%
Tunnels8–12%
High Availability8–12%

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Last updated July 20, 2026 at 6:02 PM

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QuestionQ1

IS-IS

Which two statements regarding IS-IS are correct?

Choose two

A IS-IS uses IPv6 as its transport protocol in the Junos OS implementation.
B IS-IS has two metric types and Junos sends both by default.
C IS-IS sends a maximum metric value of 63 by default.
D IS-IS only allows you to configure two areas.

Explanation

Junos OS supports both narrow and wide IS-IS metric encodings and sends both TLV pairs by default. In the normal metric mode, the maximum supported metric value is 63; configuring wide-metrics-only enables the wider metric range.

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QuestionQ2

Protocol Independent Routing

Which two statements about martian routes are correct?

Choose two

A Martian routes are never installed in the route table.
B Additional prefixes can be added to the list of martian routes.
C Martian routes only represent publicly used prefixes.
D Martian routes are always host addresses.

Explanation

Martian routes identify invalid host or network destination prefixes whose routing information is ignored, so they are not installed as usable routes. Junos OS also permits additional destination prefixes to be configured as martian addresses. They are not limited to publicly used prefixes and are not necessarily host addresses.

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QuestionQ3

OSPF

You need to create a default route that will be advertised to your internal OSPF neighbors. You have three upstream Internet connections and must ensure that, whenever available, all traffic uses ISP1 as the primary connection, using ISP2 and ISP3 only when ISP1 is unavailable.

Which solution should you implement for this scenario?

A Create a default static route with ISP1’s address as the next hop while specifying the addresses for ISP2 and ISP3 as qualified next hops with a preference value of six or higher.
B Create a default generate route that includes an import policy to match BGP routes from ISP1 and assign a preference value of four or less.
C Create a default static route with each neighbor address as the next hop.
D Create a default aggregated route.

Explanation

A static default route with ISP1 as its ordinary next hop and ISP2 and ISP3 as qualified next hops provides primary/backup forwarding. Junos selects the next hop with the lowest preference; the static route’s default preference is 5, so qualified next hops assigned preferences of 6 or higher are used only when the ISP1 path is no longer usable. The resulting static default route can be advertised to internal OSPF neighbors.

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QuestionQ4

Tunnels

Your GRE tunnel is not changing to the Up status.

What should be the first troubleshooting step?

A Verify tunnel endpoint reachability.
B Verify that the status of the management interface is up.
C Verify the status of the management routing instance.
D Verify that the routing instance for GRE tunnels is created.

Explanation

GRE tunnel establishment depends on IP reachability between the tunnel source and destination endpoints. Confirming that the tunnel endpoints can reach each other is the first diagnostic step.

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QuestionQ5

Layer 2 Security

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Which two actions does the firewall filter shown in the exhibit perform?

Choose two

A Frames with the 88:05:00:29:3c:de source MAC address are accepted and logged.
B Frames without the 88:05:00:29:3c:de source MAC address are discarded and logged.
C All traffic is permitted.
D Term two requires a from statement.

Explanation

The log action in the first term logs frames matching source MAC address 88:05:00:29:3c:de/48; with no explicit terminating action, that term has an implicit accept. The second term has no from statement, so it matches all remaining traffic and explicitly accepts it. Thus the specified source-MAC frames are accepted and logged, and all traffic is permitted. Junos makes from optional; omitting it matches all packets or frames.

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