Assume that you want to click on a link to obtain a Web page. The IP address for this link is not cached in your local host, so a DNS lookup is necessary to obtain the IP address corresponding to that link. Suppose that n DNS servers are visited before your host receives the IP address from DNS. The successive visits incur an RTT of RTT1 ,..., RTTn. Further suppose that the Web page contains one object(e. g. base file) but referencing 10 other objects on the same server, like images, audio, etc. Let RTT0 denote the RTT between the local host and the server containing objects above. Assuming zero transmission time of the objects, how much time elapses when the client clicks on the link until the client receives all the objects with: (1) Non-persistent connection without parallel TCP connection

(2) Non-persistent connection with 4 parallel TCP connections

(3) Persistent connection without pipelining

(4) Persistent connection with pipelining

Assignment directions the owner of a popular local coffee shop has approached you to design a network for his business. he would like to offer his customers wifi access to the internet, but also thinks it might be handy to network the kitchen and store room together with the office computer he already uses for ordering, scheduling, and payroll. he thinks that might save him time doing inventory control and ordering. your assignment is to create a set of questions for him that will precisely define the purpose of the network and any constraints and restrictions on its implementation. assignment guidelines create a list of at least ten questions to ask your customer. of those ten questions, at least one question must come from each of the following subject areas: purpose of the network network access and security issue network availability and fault tolerance issues future expansion issues vendor issues briefly explain in two or three sentences why you would ask each question and what you expect to learn from your customer’s response. submission requirements your questions should meet the criteria of a good survey question by being specific, unambiguous, and closed-ended. all questions, as well as your explanations, should be written in proper english using correct grammar, spelling, and punctuation. use complete sentences, and do not use slang, texting abbreviations, or shortcuts.

Which action is good business etiquette? a. switching your cell phone off before you enter a meeting b. keeping your cell phone on low volume before you enter a meeting c. setting a pleasant ring tone on your cell phone before you enter a meeting d. setting a standard ringtone on your cell phone before you enter a meeting

Jake really works well with numbers and is skilled with computers but doesn't work well with others. which of the jobs discussed in this unit might be best for jake? why?