Concepts of Topology. Topological property. Topological transformation. Continuous deformation. Genus. Homeomorphism. What is the subject of topology all about? With what subject matter is it concerned? What kinds of questions does it ask? With what kinds of problems is it concerned? Let us start with some dictionary definitions. Topology. The study of those properties of geometric figures or solid bodies that remain invariant under certain transformations. Funk & Wagnalls Dictionary
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Graphical Techniques to describe a set of Interval data ( cross-sectional data ) A. Histogram ~ A histogram is created by drawing rectangles whose bases are the class intervals (classes) and and whose heights are the frequencies. Determining number of class intervals No. of Observations No. of Classes 50‚000 17 - 20 ~ Alternatively using Sturges’s formula No. of class intervals = 1 + 3.3 log(n) where n = No. of observations ~ Determining class interval widths Class width = (Largest Observation
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Linear Programming Models: Graphical and Computer Methods 2.1 Chapter Questions 1) Consider the following linear programming model: Max X12 + X2 + 3X3 Subject to: X1 + X2 ≤ 3 X1 + X2 ≤ 1 X1‚ X2 ≥ 0 This problem violates which of the following assumptions? A) certainty B) proportionality C) divisibility D) linearity E) integrality Answer: D Page Ref: 22 Topic: Developing a Linear Programming Model Difficulty: Easy 2) Consider the following linear programming model: Min 2X1 + 3X2 Subject
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------------------------------------------------- Network topology Network topology is the arrangement of the various elements (links‚ nodes‚ etc.) of a computer or biological network. Essentially‚ it is the topological structure of a network‚ and may be depicted physically or logically. Physical topology refers to the placement of the network’s various components‚ including device location and cable installation‚ while logical topology shows how data flows within a network‚ regardless of its physical design.
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dit semester daadwerkelijk behandeld/opgegeven zijn. • Als een deelopdracht niet lukt mag je het resultaat veronderstellen om de andere delen wel te maken. • In het totaal zijn 56 punten te bereiken. ≥ 31 punten zijn zeker voldoende. Opgave 1 (10 = 5 + 5) Zij X‚ Y topologische ruimtes en f : X → Y een functie. Bewijs dat f gesloten is d.e.s.d.a. de volgende uitspraak geldt: Voor elke y ∈ Y en elke open U ⊂ X zodat f −1 (y) ⊂ U is er een open V ⊂ Y zodat y ∈ V en f −1 (V ) ⊂ U. Opgave 2 (12
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is Mesh Topology? In a mesh network topology‚ each of the network node‚ computer and other devices‚ are interconnected with one another. Every node not only sends its own signals but also relays data from other nodes. In fact a true mesh topology is the one where every node is connected to every other node in the network. This type of topology is very expensive as there are many redundant connections‚ thus it is not mostly used in computer networks. It is commonly used in wireless networks. Flooding
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LAN Topologies Archie Ben IT/240 Justin Davison Aug 28‚ 2011 11. Your network consists of four servers. Each server has three NICs. Server A is connected to servers B‚ C‚ and D. Server B is attached to C and D. Server C is attached to server D. No hub is used. All cabling is CAT 3 UTP crossover cables. What is your physical topology? a. Star b. Bus c. Ring d. Mesh Answer: This would be an example of a modified “mesh” topology. No hub is used‚ just crossover cables and multiple Nic cards
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LAN/WAN Topology and Configuration Plan Introduction This document presents an overview of the different configuration challenges‚ methods‚ and techniques required to implement a Local Area Network (LAN) and Wide Area Network (WAN). These are useful technologies that securely connect multiple LANs in separate geographical locations. When properly configured these networking technologies provide robust features‚ increased data transfer speeds‚ and secure data connectivity required by today’s companies
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11. Your network consists of four servers. Each server has three NICs. Server A is connected to servers B‚ C‚ and D. Server B is attached to C and D. Server C is attached to server D. No hub is used. All cabling is CAT 3 UTP crossover cables. What is your physical topology? a. Star b. Bus c. Ring d. Mesh I believe this to be a mesh mainly because all the servers are connected to one another. There is no hub used and Cat 3 UTP would be the cable for use in a small topology such as this. Also‚
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A definition of a Network database model Network database model is a hierarchical structure created to represent complex relation-ships more effectively than the hierarchical model‚ to improve database performance standard. Network database generally implement the set relationships by means of pointers that directly address the location of a record on the disk. This gives excellent retrieval performance Advantages of the network database model * Capability to handle more relationship types:
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