L2 and L3 Planning NETWORKING-DESIGN Practice Questions (Page 1)

Questions 1–5

1. 1expert · hard

   A large enterprise is designing a new network for its headquarters. The network will have multiple buildings, each with its own distribution layer. The team is considering using OSPF as the routing protocol. They want to ensure that a failure in one building does not cause a routing update to be sent to all other buildings. Which OSPF design feature should be implemented?

   • AUse a two-level OSPF hierarchy with each building in a separate area.
   • BUse a single OSPF area but configure route summarization.
   • CUse a single OSPF area and rely on the SPF algorithm to converge quickly.
   • DPlace all buildings in a single OSPF area.
   Reveal Solution Discussion Select an answer first
2. 2application · medium

   A retail chain is opening 20 new stores. Each store will have a small network with a few switches and a router connecting to the corporate WAN. The IT team wants to simplify IP address management and ensure that each store can be easily identified. Which IP addressing strategy is most appropriate?

   • AUse a single large /16 subnet for all stores and rely on VLANs to separate them.
   • BUse a random IP addressing scheme for each store to avoid predictability.
   • CUse a flat IP addressing scheme where all stores use the same /24 subnet.
   • DUse a hierarchical IP addressing scheme with a unique /24 subnet for each store, summarized at the WAN edge.
   Reveal Solution Discussion Select an answer first
4. 3foundation · easy

   During Layer 2 network planning, which design objective is most directly addressed by implementing Rapid Spanning Tree Protocol (RSTP) or Multiple Spanning Tree Protocol (MSTP)?

   • AReducing broadcast domain size
   • BProviding redundant paths while preventing loops
   • CIncreasing the number of available MAC addresses
   • DEnabling routing between VLANs
   Reveal Solution Discussion Select an answer first
5. 4expert · hard

   A university is designing a new research building. The network must support high-bandwidth data transfers between research servers and also provide redundancy. The team is considering using Link Aggregation (LAG) between the access switches and the distribution switches. However, they are concerned about the impact on spanning tree. Which design consideration is most important to ensure the LAG provides both increased bandwidth and redundancy without causing a loop?

   • ADisable spanning tree on all ports that are part of the LAG to prevent blocking.
   • BConfigure the LAG as a single logical link so spanning tree treats it as one port.
   • CUse Rapid Spanning Tree Protocol (RSTP) instead of spanning tree to speed up convergence.
   • DEnsure that all links in the LAG are configured with the same speed and duplex settings.
   Reveal Solution Discussion Select an answer first
6. 5expert · hard

   A large enterprise is designing a new WAN. The design must support real-time voice and video traffic with low latency, as well as bulk data transfers. The network team is considering using MPLS with QoS. Which design consideration is most important to ensure that voice and video traffic is not impacted by bulk data transfers?

   • AUse a single class of service but increase the WAN bandwidth to accommodate all traffic.
   • BImplement multiple classes of service with strict priority queuing for voice and video, and a separate class for bulk data.
   • CUse a single class of service and rely on TCP congestion control to manage the bulk data traffic.
   • DUse a single class of service for all traffic and rely on the WAN provider to prioritize traffic.
   Reveal Solution Discussion Select an answer first