The [1] layer and [2] layer of the Internet protocol stack are implemented in the end systems but not in the routers of the network core. You may write the name of these two layers in either order.

The weight of a Fraggle Rock Doozer is normally distributed with a mean of 282.3 grams and a standard deviation of 62.4 grams. A particular Doozer named Cotterpin is 184.3 grams. Find the z-score for Cotterpin’s weight, and the probability of randomly selecting a Doozer with a weight of at least 184.3 grams. Express your z-score to two decimal places and your probability to four decimal places. z-Score:  [zscore] Probability: [prob]  

Let z be the standard normal random variable. Find the following probabilities (or areas) to 4 decimal places.  1)  

In packet-switching networks, the packet suffers from several types of delays at each node along the path. The figure below indicates the four most important types of delays as introduced in the textbook that are accumulated to define a total nodal delay at router A. The four types of delays occur one after the other in the order from (a) to (d) as shown in the figure below, where (a) = [1] delay, (b) = [2] delay, (c) = [3] delay, and (d) = [4] delay, respectively.  

Which of the following is an inherent disadvantage of television advertising?

The height of a species native to Fraggle Rock, called Fraggles, are normally distributed with a height of 26.8 inches and a standard deviation of 1.4 inches. What is the probability that a sample of 5 Fraggles have an average weight more than 28 inches. Provide the z-score as well. Express your z-score to two decimal places and your probability to four decimal places. z-Score:  [zscore] Probability: [prob]  

Which of the following is true of perception?

The inherent [1]-[2] of P2P is mainly because every peer not only requests services (as a client) but also provides services (as a server) using its own capacity in return.

For network applications such as Internet telephony or video conferences, it is desirable to have a low delay and an instantaneous throughput consistently above some threshold. However, other applications like file transfers, delay is not critical, but it is desirable to have the highest possible throughput.

There are five data packets to be sent from source to destination via a router as shown in the above network. We also know that L = 100 Kbits and both links are 840 Km long with a transmission rate R = 10 Mbps and propagation speed of 2.8 x 108 m/sec.  Question (1) (5 points) If both transmission and propagation delays are counted and the router is a stored-and-forward router, how long does it take for all five packets to reach the destination completely? Your answer: [1] msec Question (2) (5 points) All remain the same as (1) except the router is not a stored-and-forward router. Your answer: [2] msec