WAN Technologies Netacad Practice Exam Questions With Multiple Choices Verified Answers.
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Course
WAN.
Institution
WAN.
What's a WAN compared to a LAN? - correct answer WANs are used to interconnect the enterprise LAN to remote LANs in branch sites and telecommuter sites (as an example).
WANs are owned by service providers (e.g. telephone networks, cable companies, satellite services).
LANs are typically...
What's a WAN compared to a LAN? - correct answer WANs are used to interconnect the enterprise
LAN to remote LANs in branch sites and telecommuter sites (as an example).
WANs are owned by service providers (e.g. telephone networks, cable companies, satellite services).
LANs are typically owned by organisations to connect local computers and small geographic regions.
LANs would just be a series of isolated networks without WANs.
What are the common WAN topologies? - correct answer - Point-to-Point
- Hub-and-Spoke
- Full Mesh
- Dual-Homed
Briefly, what is Point-to-Point topology? - correct answer - Point-to-point circuit between two
endpoints
- Dedicated leased line connections, e.g. T1/E1 lines
- Layer 2 transport service through the service provider network.
Briefly, what is Hub-and-Spoke topology? - correct answer - Point-to-multipoint (e.g. one hub
connecting to multiple spokes)
, - Spoke sites can be interconnected using virtual circuits and routed subinterfaces.
Briefly, what is Full Mesh topology? - correct answer - Any site can communicate with any other site,
without the need for a hub
- However, requires a large number of virtual circuits that need to be configured and maintained.
Briefly, what is Dual-homed topology? - correct answer - Provides redundancy
- Two hubs are dual-homed and redundantly attached to three spoke routers across a WAN cloud.
- Are more expensive to implement, because additional networking hardware required.
- Difficult to implement because more complex configurations are required.
- Enhanced redundancy, load balancing, distributed computing or processing, and ability to implement
backup service provider connections.
In which OSI layers are WAN operations primarily focused? - correct answer Layer 1 Physical
(electrical, mechanical, cabling, etc), and Layer 2 Data Link (defines how data is encapsulated).
Which authorities manage WAN access standards? - correct answer TIA/EIA
ISO
IEEE
Why is the address field in the Layer 2 frame for a WAN link not usually used? - correct answer Most
WAN links are point-to-point.
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