IP-IP JN0-352 Practice Questions (Page 1)

Questions 1–5

1. 1expert · medium

   You are configuring an IP-IP tunnel on a Junos router. The tunnel source is 192.0.2.1 and the tunnel destination is 198.51.100.1. You have configured the tunnel interface 'ip-0/0/0' with unit 0 and assigned the address 10.0.0.1/30. You have also added a static route for the remote network 10.0.1.0/24 with next-hop 'ip-0/0/0.0'. However, the tunnel is not coming up. You run 'show interfaces terse' and see that the tunnel interface is 'down'. What is the MOST LIKELY reason for the tunnel being down?

   • AThe tunnel source address 192.0.2.1 is not assigned to any local interface.
   • BThe static route for the remote network is not configured correctly.
   • CThe tunnel interface is not configured with a logical unit number.
   • DThe tunnel destination address 198.51.100.1 is not reachable from the router.
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2. 2application · easy

   Your network uses a service provider that offers only IPv4 transport. You need to connect two remote IPv6 networks across this IPv4-only infrastructure. You have chosen to use an IP-IP tunnel. What is the PRIMARY purpose of the tunnel in this design?

   • ATo compress the IPv6 headers to reduce bandwidth consumption on the WAN link.
   • BTo provide encryption and authentication for the IPv6 traffic as it crosses the public network.
   • CTo translate IPv6 addresses into IPv4 addresses so the networks can communicate directly.
   • DTo encapsulate IPv6 packets inside IPv4 packets so they can traverse the IPv4-only network.
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4. 3application · easy

   You are troubleshooting an IP-IP tunnel and need to verify that the tunnel is passing traffic. You run 'show interfaces ip-0/0/0.0 extensive' and see the following output: 'Input packets: 1000, Output packets: 0'. What does this tell you about the tunnel?

   • AThe tunnel is sending traffic but not receiving any traffic.
   • BThe tunnel is working correctly and passing traffic in both directions.
   • CThe tunnel is down and no traffic is flowing.
   • DThe tunnel is receiving traffic but not sending any traffic.
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5. 4foundation · easy

   What is the primary purpose of an IP-IP tunnel in Junos?

   • ATo encrypt IP traffic to ensure confidentiality across an untrusted network
   • BTo compress IP packets to reduce bandwidth usage
   • CTo encapsulate an IP packet within another IP packet for transport across a network
   • DTo translate private IP addresses to public IP addresses for internet connectivity
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6. 5foundation · easy

   In an IP-IP tunnel configuration, what is the purpose of the 'tunnel source' and 'tunnel destination' statements?

   • AThey define the IP addresses assigned to the tunnel interface for routing purposes.
   • BThey specify the IP addresses of the devices that will send and receive traffic through the tunnel.
   • CThey define the local and remote endpoints of the tunnel, which are used as the source and destination addresses in the outer IP header.
   • DThey determine the encapsulation protocol used for the tunnel.
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