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Questions and Answers
What is a disadvantage of a single-carrier WAN connection?
What is the main advantage of a dual-carrier WAN connection?
In a dual-carrier WAN connection, what should the organization ensure about the two providers?
What happens if the provider router in a single-carrier connection fails?
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What is a characteristic of a fully meshed WAN topology?
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In a partially meshed WAN topology, what is true about inter-site connections?
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What type of network interconnects several LANs within a limited geographical area?
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Which network topology connects each device to every other device in the network?
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What type of connection provides internet access to the company through a common broadband service?
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As the company grew and required a Campus Area Network, what did they use to segment the various departments in the network?
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What type of agreement did the company have with the DSL provider to support their IT requirements?
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In a partially meshed network, how are the devices connected?
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In a point-to-point connection, what type of transport service is involved?
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What topology enables a single interface on the hub router to be shared by all spoke circuits?
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What type of connectivity does a dual-homed topology provide?
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What happens to inter-spoke communication in a hub-and-spoke topology if the hub router fails?
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How many hub routers are involved in a dual-homed topology?
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What type of topology involves all nodes being interconnected, allowing for direct communication between any two nodes?
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Study Notes
WAN Connections
- Single-carrier WAN connection can create a single point of failure.
- Dual-carrier WAN connection enhances reliability by using multiple service providers.
- Organizations must ensure both providers in a dual-carrier setup have diverse routing paths to avoid simultaneous outages.
Network Failures
- In a single-carrier connection, failure of the provider router leads to a complete loss of connectivity for that WAN.
WAN Topologies
- Fully meshed WAN topology allows for every node to connect directly to every other node, ensuring robust redundancy and communication.
- In a partially meshed WAN topology, not all nodes are interconnected; only certain nodes have direct connections for optimized traffic.
Local and Campus Networks
- A Local Area Network (LAN) interconnects several LANs within a limited geographical area, facilitating communication within small regions.
- As the company expanded into a Campus Area Network (CAN), segmentation of departments was achieved through Virtual Local Area Networks (VLANs).
Network Agreements
- The company likely established a Service Level Agreement (SLA) with the DSL provider to outline support and performance expectations for IT needs.
Network Connections
- In a partially meshed network, devices have both direct and indirect connections, allowing some nodes to communicate without going through a central hub.
- Point-to-point connections utilize dedicated transport services, providing a direct link between two endpoints.
Hub-and-Spoke Topology
- A hub-and-spoke topology allows multiple spoke circuits to share a single interface on the hub router, streamlining connectivity.
- In a hub-and-spoke configuration, if the hub router fails, inter-spoke communication is disrupted as all traffic relies on the hub.
- Dual-homed topology generally involves two hub routers, enhancing redundancy and availability.
Interconnection Characteristics
- All nodes being interconnected denotes a fully meshed topology, allowing direct communication between any two nodes without reliance on intermediaries.
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Description
Explore the concept of a single-carrier WAN connection in computer studies, where an organization connects to only one provider. Learn about the disadvantages of this design, such as single points of failure with the carrier connection and service provider.
