JN0-664 practice examsIn development

Juniper Networks Certified Professional, Enterprise Routing and Switching

Juniper · advanced · 90 minutes

In developmentThis course is still being brought to our full standard. The questions and notes are usable, but they have not yet been checked line by line against the vendor’s own training.

The professional level that scales and tunes an enterprise Junos network: OSPF understood by LSA type and stub, totally stubby and NSSA areas, IS-IS with levels running over the data link, BGP for multi-homing with an ordered path selection tuned through policy; then Q-in-Q and EVPN-VXLAN fabrics, Layer 3 multicast split between IGMP toward hosts and PIM in the core, GRE and IPsec tunnelling with class of service protecting priority traffic through congestion, and the GRES, graceful restart and nonstop routing that keep the network forwarding through failure.

What you get

196practice questions

3full papers of 65

2course chapters · 12 minutes

100%answers explained

Papers are cut from the bank and weighted like the real exam, and no question appears in two of them. Every wrong answer comes back on later days until you have it right.

What the exam covers

The domains our question bank is built on. We have not yet transcribed this vendor’s own outline for this exam.

Advanced OSPF, IS-IS and BGP	Not published
Advanced switching, tunnelling and high availability	Not published

Two sample questions

Two of the 196, with the answer and the explanation.

1. What is the difference between IPsec tunnel mode and transport mode?

Tunnel mode encrypts only the payload and leaves the header exposed
Tunnel mode may only be used between two hosts on the same subnet
Tunnel mode requires a pre-shared key while transport mode uses certificates
Tunnel mode encapsulates the entire original packet in a new IP header — correct

Why: Tunnel mode protects the whole original packet and adds a new outer header, which is what allows gateways to carry traffic on behalf of the networks behind them.

2. What is the role of the ABR?

Run the IGMP process
Forward multicast
Area to backbone — correct
Encrypt the tunnels

Why: An Area Border Router connects an OSPF area to the backbone.

The real JN0-664 exam

Length	90 minutes
Questions	65
Pass mark	Scaled; Juniper does not publish the percentage
Price	$300 USD
Recommended before you sit it	None enforced. JNCIS-ENT specialist knowledge is assumed.
Valid for	3 years

Exam facts as published by Juniper; always check the vendor’s page before you book.

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