Chapter 9 WAN Certification Revised Exam Questions With Multiple Choices And Verified Answers.
5 views 0 purchase
Course
WAN.
Institution
WAN.
Wide Area Networks - correct answer -typically run long distance, connecting different offices in different cities or countries
-Most organizations lease circuits from common carriers
Local exchange carrier - correct answer A common carrier that provides local telephone services
I...
Wide Area Networks - correct answer -typically run long distance, connecting different offices in
different cities or countries
-Most organizations lease circuits from common carriers
Local exchange carrier - correct answer A common carrier that provides local telephone services
Interexchange carrier - correct answer A common carrier that provides long distance services
Federal Government Agencys - correct answer -Regulates data and voice communications
-US=Federal Communications Commission
-Canada=Canadian Radio-Television and Telecommunications commission
-Each state= public utilities commission to regulate communications in their borders
Private Line services - correct answer -Dedicated-circuit networks
Dedicated circuit network - correct answer -Lease circuits from common carriers and all connections
are point to point
-Circuits run through common carriers cloud, but network behaves as if you have your own physical
circuits running from one point to another
-Billed at a flat fee per month
-Making changes can be expensive b/c means rewiring the buildings/signing new contract
Channel Service Unit and Data Service Unit - correct answer -CSU/DSU is the WAN equivalent of a NIC
in a LAN
-Device takes the outgoing packet and translates it to use the data link layer and network protocols used
in the WAN
, Three basic architectures used in dedicated Circuit networks - correct answer 1. Ring
2. Star
3. Mesh
Ring Architecture - correct answer -connects all computers in a closed loop with each computer
linked to the next
-Circuits are full duplex or half duplex (messages flow in both directions around the ring)
-Disadvantage-messages can take a long time to reach the receiver
-Failure of one circuit means can still function (messages are routed in the opposite direction around
ring)
Star Architecture - correct answer -Connects all computers to one central computer that routs
messages to appropriate computers
-Easy to manage
-Faster than ring b/c message needs to travel through at most 2 circuits
-Most susceptible to traffic problems b/c central computer must process all messages
-Failure of one circuit only affects that computer but failure of central computer, entire network fails
Mesh Architecture types - correct answer 1. Full mesh architecture= every computer is connected to
ever other computer (high cost)
2. Partial Mesh (mesh)= many but not all computers are connected (far more common)
Mesh Networks - correct answer -Combine the performance benefits of both ring and star
-Provide relatively short routes through the network
-Provide many possible routes so no one circuit becomes overloaded
-Drawback: decentralized routing so that each computer in network does its own routing (more
processing by each computer
Two types of dedicated circuit services - correct answer 1. T carrier services
2. Synchronous optical network services (SONET)
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Rechga. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.99. You're not tied to anything after your purchase.
