Virtual Links JN0-664 Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   An administrator is configuring a virtual link on an ABR in area 1 to connect area 2 to the backbone. The ABR in area 2 has router ID 2.2.2.2. The administrator issues the command 'set protocols ospf area 1 virtual-link 2.2.2.2'. What additional configuration is required for the virtual link to become operational?

   • AThe virtual link must be configured in area 0 on both ABRs
   • BThe ABR in area 2 must have a direct physical connection to area 0
   • CA static route to the ABR in area 2 must be added to the routing table
   • DThe same virtual link must be configured on the ABR in area 2, referencing the router ID of the ABR in area 1
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2. 2foundation · easy

   How does OSPF treat a virtual link for the purpose of LSA flooding?

   • AAs a static route that does not participate in LSA flooding
   • BAs a broadcast link in the transit area
   • CAs a point-to-point link belonging to the backbone area
   • DAs a separate OSPF area with its own LSA database
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4. 3foundation · easy

   In OSPF, what is the primary purpose of configuring a virtual link?

   • ATo increase the bandwidth between two routers by aggregating multiple physical links
   • BTo connect a non-backbone area to the backbone area when a direct physical connection is not available
   • CTo provide a backup path for a single point of failure in a non-backbone area
   • DTo enable OSPF to run over a non-IP network such as Frame Relay
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5. 4foundation · easy

   What is the role of the transit area in the operation of a virtual link?

   • AIt carries OSPF packets between the two ABRs, but the virtual link itself is considered part of the backbone
   • BIt must be a stub area to reduce LSA flooding
   • CIt is used only for the initial handshake and is not involved in ongoing operation
   • DIt becomes part of the backbone area once the virtual link is established
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6. 5application · medium

   A service provider has an OSPF network with area 0, area 1, and area 2. Area 2 is connected to area 1, but not to area 0. The administrator wants to ensure that area 2 can exchange routes with the backbone. What is the most efficient way to achieve this?

   • AConfigure a GRE tunnel between area 2 and area 0 to establish an OSPF adjacency
   • BConfigure a static route from area 2 to area 0 and redistribute it into OSPF
   • CConfigure a virtual link between the ABR in area 2 and the ABR in area 0, using area 1 as the transit area
   • DConfigure area 2 as a stub area and use a default route to the backbone
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