Networking: delay in packet switching and circuit switching

 

Communication between A and B in this network can be either packet switched (Based on “store-and-forward” principle) or circuit switched. Assume that a connection has already been set up between A and B. There are also other active connections in the network, e.g. between C and D shown in the figure.

Explain the various contributions to delay through the network when we use

a) line switching for an information unit sent from A to B.

b) packet switching for an information unit sent from A to B.

 

Sample Solution

started to get “fresh.” There were a lot of different ration packs during WWII. First introduced was the “A-Ration” or “Garrison Ration” which was usually cooked in field kitchens. It consisted of a raspberry drink, cereal, muffin, jam and peanut butter, apple, salt/pepper, and some sort of sandwich based on preference. A bit different type of ration was the “B-Ration” which was canned food, prepared in field kitchens that had no need to be refrigerated. Another ration that the soldiers had during WWII was the “C-Ration.” Unlike the A and B Ration this one had precooked food. The “C-Ration” consisted of one pound of meat, beans and meat, meat and potato hash, meat and vegetable stew, and bread and dessert can. It usually lasted one day. Another type of ration pack was the “K-Ration which was the ration that was designed for light infantry, tank crew, and motorcycle infantry. It was usually Emergency packaged rations. Contained a dinner, supper, and breakfast meal. It was similar to the rations of today. Individual rations for breakfast, lunch, and dinner were also available. The dinner ration was a ration obviously enough for dinner. This ration contained a pork luncheon, canned American/Swiss cheese, bacon and cheese, biscuits, malted milk Tablets, caramels, sugar/salt, cigarettes, matches, gum, and a energy drink beverage powder. The Breakfast ration was a ration designed for what people would usually eat during the 1940’s in America. It contained Veal, Chopped Eggs and Ham, Biscuits, Dextrose, malted milk Tablets, dried fruit bar, oatmeal/cereal, water purification Tablets so the soldiers can drink the water that is stagnant, gum, and cigarettes. The other type of ration was the Supper Ration which provided about 2,830-3,000 calories for a single soldier. Inside the Supper ration was canned sausage, a random choice of po

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