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business
business communication essentials

Questions and Answers of Business Communication Essentials

How does a logical topology differ from a physical topology?
Briefly describe how CSMA/CD works.
Explain the terms 100Base-T, 100Base-F, 1000Base-T, 10 GbE, and 10/100/1000 Ethernet.
How do Ethernet switches know where to send the frames they receive? Describe how switches gather and use this knowledge.
Compare and contrast cut-through, store-and-forward, and fragment-free switching.
Compare and contrast the two types of antennas.
How doesWi-Fi perform media access control?
How does Wi-Fi differ from shared Ethernet in terms of topology, media access control, and error control, Ethernet frame?
Explain how CSMA/CA DCF works.
Explain how CSMA/CA PCF works.
Explain how association works in WLAN.
What are the best practice recommendations for wired LAN design?
What are the best practice recommendations for WLAN design?
What is a site survey, and why is it important?
How do you decide how many APs are needed and where they should be placed for best performance?
How does the design of the data center differ from the design of the LANs intended to provide user access to the network?
What are three special-purpose devices youmight find in a data center and what do they do?
What is a bottleneck and how can you locate one?
Describe three ways to improve network performance on the server.
Describe three ways to improve network performance on circuits.
Many of the wired and wireless LANs share the same or similar components (e.g., error control). Why?
AsWLANs becomemore powerful,what are the implications for networks of the future? Will wired LANS still be common or will we eliminatewired offices?
How does a layer 2 switch differ from a router?
How does a layer 2 switch differ from a VLAN?
How does a router differ from a VLAN?
Under what circumstances would you use a switched backbone?
Under what circumstances would you use a routed backbone?
Under what circumstances would you use a VLAN backbone?
Explain how routed backbones work.
In Figure 8-5, would the network still work if we removed the routers in each building and just had one core router?What would be the advantages and disadvantages of doing this?
Explain how switched backbones work.
What are the key advantages and disadvantages of routed and switched backbones?
Compare and contrast rack-based and chassis-based switched backbones.
What is a module and why are modules important?
Explain how single-switch VLANs work.
Explain how multiswitch VLANs work.
What is IEEE 802.1q?
What are the advantages and disadvantages of VLANs?
How can you improve the performance of a BN?
Why are broadcast messages important?
What are the preferred architectures used in each part of the backbone?
Some experts are predicting that Ethernet will move into theWAN.What do you think?
What are common carriers, local exchange carriers, and interexchange carriers?
Who regulates common carriers and how is it done?
How do Ethernet services work in the WNA?
Compare and contrast dedicated-circuit services and packet-switched services.
Is a WAN that uses dedicated circuits easier or harder to design than one that uses packet-switched circuits?Explain.
Compare and contrast ring architecture, star architecture, and mesh architecture.
What are the most commonly used T carrier services?What data rates do they provide?
Distinguish among T1, T2, T3, and T4 circuits.
Describe SONET. How does it differ from SDH?
How do packet-switching services differ from other WAN services?
Where does packetizing take place?
Compare and contrast frame relay and Ethernet services.
Which is likely to be the longer-termwinner: IP or Ethernet services?
Explain the differences between CIR and MAR.
How do VPN services differ from common carrier services?
Explain how VPN services work.
Compare the three types of VPN.
How can you improveWAN performance?
Describe five important factors in selecting WAN services.
Are Ethernet services a major change in the future of networking or a technology blip?
Are there anyWAN technologies that you would avoid if you were building a network today? Explain.
Suppose you joined a company that had a WAN composed of SONET, T carrier, and frame relay services, each selected to match a specific network need for a certain set of circuits. Would you say this
It is said that frame relay services and dedicated-circuit services are somewhat similar from the perspective of the network designer.Why?
What is the basic structure of the Internet?
Explain how the Internet is a network of networks.
What is an IXP?
What is a POP?
Explain one reason why you might experience long response times in getting a Web page from a server in your own city.
What type of circuits are commonly used to build the Internet today? What type of circuits are commonly used to build Internet2®?
Compare and contrast cable modem and DSL.
Explain how DSL works.
How does a DSL modem differ from a DSLAM?
Explain how ADSL works.
Explain how a cable modem works.
What is an OE converter? A CMTS?
Which is better, cable modem or DSL? Explain.
Explain how FTTH works.
What are some future technologies that might change how we access the Internet?
Explain howWiMax works.
What are the principal organizations responsible for Internet governance, and what do they do?
How is the IETF related to the IRTF?
What is the principal American organization working on the future of the Internet?
What is Internet2®?
What is a gigapop?
Today, there is no clear winner in the competition for broadband Internet access. What technology or technologies do you think will dominate in 2 years’ time?Why?
Would you be interested in subscribing to 100 Mbps FTTH for a monthly price of $100?Why or why not?
Many experts predicted that small, local ISPs would disappear as regional and national ISPs began offering local access.This hasn’t happened.Why?
What factors have brought increased emphasis on network security?
Briefly outline the steps required to complete a risk assessment.
Name and describe the main impact areas. Who should be responsible for assessing what is meant by low/medium/high impact for each of the impact areas?Explain your answer.
What are some of the criteria that can be used to rank security risks?
What are themost common security threats?What are the most critical?Why?
Explain the purpose of threat scenarios. What are the steps in preparing threat scenarios?
What is the purpose of the risk score, and how is it calculated?
What are the possible risk control strategies? How do we pick which one to use?
Why is it important to identify improvements that are needed to mitigate risks?
What is the purpose of a disaster recovery plan?What are five major elements of a typical disaster recovery plan?
What is a computer virus?What is ransomware?

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