Chapter 1: WAN Certification Exam Questions With Well Elaborated Answers.
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WAN.
Instelling
WAN.
Service Provider - correct answer A WAN is owned by a _________, and a business pays a fee to use the provider's WAN network services.
WANs - correct answer _________ are used to interconnect the enterprise LAN to remote LANs in branch sites and telecommuter sites.
Service Providers...
Service Provider - correct answer A WAN is owned by a _________, and a business pays a fee to use
the provider's WAN network services.
WANs - correct answer _________ are used to interconnect the enterprise LAN to remote LANs in
branch sites and telecommuter sites.
Service Providers - correct answer _________ provide links to interconnect remote sites for the
purpose of transporting data, voice, and video.
LANs - correct answer In contrast, ________ are typically owned by an organization and used to
connect local computers, peripherals, and other devices within a single building or other small
geographic area.
WANs, LANs - correct answer Without _______, ________ would be a series of isolated networks.
- Point-to-point
- Hub-and-Spoke
- Full Mesh
- Dual-Homed - correct answer Name 4 Common WAN topologies:
Point-to-Point - correct answer Typically involving dedicated leased-line connections like T1/E1 lines,
a ____________ connection involves a Layer 2 transport service through the service provider network.
Packets sent from one site are delivered to the other site and vice versa.
Point-to-Point - correct answer A ____________ connection is transparent to the customer network,
as if there was a direct physical link between two endpoints.
hub-and-spoke - correct answer With a ______________ topology a single interface to the hub can be
shared by all spoke circuits.
,Single-homed - correct answer Spoke sites can be interconnected through the hub site using virtual
circuits and routed subinterfaces at the hub. A hub-and-spoke topology is also an example of a
_______________ topology.
hub - correct answer One of the disadvantages of hub-and-spoke topologies is that all communication
has to go through the _______ .
full mesh - correct answer With a __________ topology using virtual circuits, any site can
communicate directly with any other site.
Full Mesh - correct answer Which topology requires maintenance and configuration of large numbers
of virtual circuits?
Dual-homed - correct answer Which topology provides redundancy?
Dual-homed - correct answer Which type of homed topology is more complicated to implement and
cost more due to additional hardware?
Dual-homed - correct answer Which topology provides enhanced network redundancy, load
balancing, distributed computing or processing, and the ability to implement backup service provider
connections?
Privacy - correct answer Although connecting offices through the Internet is economical, it introduces
___________ and __________ issues that the IT team must address.
Campus Network - correct answer What kind of network?
Hundreds of employees work on one or more floors, or neighboring buildings.
Small Office Network - correct answer Which kind of network? Small single LAN for sharing
peripherals and Internet access
, Branch Network - correct answer Which kind of network? Connecting Central office, remote office,
branch office, and regional office all together via Internet WAN.
Distributed Network - correct answer Which kind of network? Thousands of employees distributed in
office world wide.
Layer 1 (Physical Layer) and Layer 2 (Data Link) - correct answer WAN operations focus primarily on
which two layers of the OSI model?
Physical addressing, encapsulation. - correct answer The data link layer requirements include
_________ addressing, flow control, and _____________.
- Telecommunications Industry Association and the Electronic Industries Alliance (TIA/EIA)
- International Organization for Standardization (ISO)
- Institute of Electrical and Electronics Engineers (IEEE) - correct answer WAN access standards are
defined and managed by a number of recognized authorities (3):
1 - correct answer Layer ____ protocols describe how to provide electrical, mechanical, operational,
and functional connections to the services of a communications service provider.
2, Frames. - correct answer Layer ___ protocols define how data is encapsulated for transmission
toward a remote location, and the mechanisms for transferring the resulting _______.
Point-to-point (PPP), Frame Relay, and ATM. - correct answer Name some technologies used in Layer
2.
High-Level Data Link Control (HDLC) - correct answer Some protocols (PPP, Frame Relay, ATM) use the
same basic framing or a subset of the _______________________ mechanism.
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