Logical System Communication JN0-637 Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   What is the purpose of using IPsec VPNs between logical systems?

   • ATo allow logical systems to share the same routing table
   • BTo replace the need for routing instances
   • CTo provide secure, encrypted communication between logical systems
   • DTo provide a direct physical connection between logical systems
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2. 12foundation · easy

   Which command is commonly used to verify connectivity between logical systems?

   • Ashow configuration
   • Brequest system reboot
   • Cping
   • Dshow interfaces terse
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4. 13foundation · easy

   Which statement accurately describes how logical systems on a Junos device communicate with each other?

   • ALogical systems communicate through routing instances or directly connected interfaces, with traffic isolated by default.
   • BLogical systems communicate only through external networks, never directly on the same device.
   • CLogical systems communicate by default without any configuration, using a shared routing table.
   • DLogical systems communicate only through the default logical system, which acts as a central hub.
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5. 14application · medium

   A company has two logical systems on separate routers at different sites. LS-East and LS-West need to exchange routing information securely over the public internet. The security team requires encryption of all traffic between the two logical systems. Which solution should be implemented?

   • AConfigure an IPsec tunnel between the two logical systems, using the physical interfaces as tunnel endpoints.
   • BConfigure a GRE tunnel between the two logical systems and rely on the underlying physical network for security.
   • CConfigure a routing instance with a direct physical connection between the two sites.
   • DUse a simple static route pointing to the remote logical system's loopback address.
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6. 15application · medium

   A service provider hosts two customers in separate logical systems on the same MX router. Customer A's logical system (LS-A) has a routing instance named 'cust-A' with interface ge-0/0/1. Customer B's logical system (LS-B) has a routing instance named 'cust-B' with interface ge-0/0/2. The provider wants to enable direct IP communication between these two customers without using external cables or a back-to-back physical link. Which configuration approach should the provider use?

   • AUse an IPsec tunnel between the two logical systems, terminated on the loopback interfaces of each logical system.
   • BConfigure a GRE tunnel between LS-A and LS-B using the physical interfaces ge-0/0/1 and ge-0/0/2 as tunnel endpoints.
   • CCreate a logical tunnel interface (lt-0/0/0) in each logical system, assign each end to the respective routing instance, and configure an IP address on each end.
   • DPlace both customer interfaces into the same routing instance within LS-A and import LS-B's routes using rib-group.
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