In TCP/IP, we generally refer to the data handled by each layer as “packets”, however, there is a specific term for these data packets defined in the book for each of the top four layers of TCP/IP, including [1] for a packet of application layer, [2] for a packet of transport layer, [3] for a packet of network layer, and [4] for a packet of link layer. And, in telecommunications (and more than once in our lectures), people may also use another term, PDU, to represent a single unit of information transmitted among peer entities of a computer network, which could refer to any of the above four specific data packets. Here PDU stands for [5] unit.  (First four blanks must be one single word and the fifth blank contains two words, all in singular form and case insensitive. No partial credits for misspelled words or incorrect form.)

HTTP has a mechanism that allows a cache to verify that its objects are up to date. This mechanism is called the ___________. (Two words)

Which of the following is true of television as an advertising medium?

DASH allows clients with different Internet access rates to stream in video at different encoding rates. 

Suppose that you are downloading an MP3 file of 32 million bits, the server has a transmission rate of 2 Mbps, and you have an access link of only 1 Mbps. The throughput of this simple two-link network should be [1] (must be a number with data unit). Without considering store-and-forward and processing delays as well as protocol issues, the approximate time needed to transfer the file is then [2] seconds. (just a number)

In a survey of 132 Fraggles, 113 are satisfied with their career choice. We wish to estimate, with 90% confidence, the true proportion of Fraggles who are satisfied with their career choice. Answer the following. For part 2, write your response on your scratch paper. Express your answers to part 1 as decimals rounded to three decimal places. Express your answers to part 3 as percentages rounded to two decimal places. p̂ = [pvalue] Are the conditions met? Explain. With 90% confidence, the true proportion of Fraggles who are satisfied with their career choice is between [first]% and [second]%.

A population has mean μ = 60 and standard deviation σ = 14. A sample of size n = 49 is collected. What are the mean (

Suppose that we have the following three 4-bit words in a packet to transmit via UDP protocol: 1101, 0101, and 0111.  The 4-bit binary sum of these three words should be [1]. The checksum that sender generates and transmits should be [2]. Assuming receiver gets the above checksum without errors and the three words it received are 0101, 1101, and 0111. When it adds the checksum to these words, it should have a 4-bit result of [3]. Based on the above 4-bit result, the receiver would conclude that the packet it received contains [4] (fill in ‘error’ or ‘no error’ without quotes).

1.9 Where can the General connect link be found by the students? (2)

1.11 This image refers to (a) _________, which is our (b) ____________system at Teneo. (2)