... Chair of Mobile Business & Multilateral Security. Mentorium Business Informatics 2 (PWIN)
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1 Mentorium Business Informatics (PWIN) Communication Systems I, II & Management of IT Projects WS 05/06 Shuzhe Yang Chair of Mobile Business & Multilateral Security Jenser (Flickr.com) Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security
2 Using Dijkstra Algorithm nd Example Wired Networks Wireless Networks IT-Project Management Agenda Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security
3 A (0,-) 3 D B C 4 Dijkstra Algorithm () Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security 3 E F G H
4 A (0,-) 3 D B C 4 Dijkstra Algorithm () Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security 4 E F G H
5 A (0,-) 3 D B C (,A) (,A) 4 Dijkstra Algorithm () Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security 5 E (,A) (3,A) F G H
6 A (0,-) 3 D B C (,A) (,A) 4 Dijkstra Algorithm () Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security 6 E (8,B) (3,A) F G H
7 A (0,-) 3 D B C (,A) (,A) 4 Dijkstra Algorithm () Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security E (,D) (3,A) (5,D) F G H
8 A (0,-) 3 D (6,F) (,A) B C 4 Dijkstra Algorithm () Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security 8 E (,D) (3,A) (5,D) F G H (,F)
9 A (0,-) 3 D (6,F) (,A) B C 4 Dijkstra Algorithm () Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security E (,D) (3,A) (5,D) F G H (,F)
10 A (0,-) 3 D (6,F) (,A) B C 4 Dijkstra Algorithm () Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security 0 E (,D) (,E) (3,A) (5,D) F G H (,F)
11 A (0,-) 3 D (6,F) (,A) B C 4 Dijkstra Algorithm () Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security E (,D) (,E) (3,A) (5,D) F G H (,G)
12 A (0,-) 3 D (3,A) C (6,F) (,A) B 4 Dijkstra Algorithm () Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security E (,D) F (5,D) G (,E) Shortest path: A à D à E à G à H or: A à D à F à C à E à G à H H (,G)
13 Using Dijkstra Algorithm nd Example Wired Networks Wireless Networks IT-Project Management Agenda Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security 3
14 Wired Networks Name and explain the application areas of Ethernet, xdsl and FTTx. The myplace Service constitutes a mobile application/service. Nevertheless, it also makes use of wired networks for its data communications. Explain where and why. Source: Business Laudon, Informatics K.C., Laudon, (PWIN) J.P., WS 05/06, Schoder, D. Chair (006) of Mobile Business & Multilateral Security 4
15 Ethernet Wired Networks: Solution In Building with a range up to about 00m, (bandwidth up to 0Gbit) xdsl use existing copper wires of a telephone network DSL communication is enabled by a connection between DSL modem (User) and a Digital Subscriber Line Access Multiplexer (DSLAM) (Provider) FTTx a generic term for any broadband network architecture that uses optical fiber for the so-called last mile Expensive and only short distance with high date rate Source: Business Laudon, Informatics K.C., Laudon, (PWIN) J.P., WS 05/06, Schoder, D. Chair (006) of Mobile Business & Multilateral Security 5
16 Access to mobile portal setting user profile mobile customer contact Creation of dyn. () user profile () Profile DB myplace service Localisation DB Process overview of the myplace service Services Campaigns Promotions Customer Care POI POI n Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security 6 (3) Personalized Service offer Targetgroup DB POI... Define target group & Usage context
17 Wired Networks (myplace): Solution Data centre: Server use wired network Infrastructure of mobile phone network are usually wired Wlan access points use wire network Internet access at home is most certainly partially wired, e.g. DSL or cable internet Source: Business Laudon, Informatics K.C., Laudon, (PWIN) J.P., WS 05/06, Schoder, D. Chair (006) of Mobile Business & Multilateral Security
18 Using Dijkstra Algorithm nd Example Wired Networks Wireless Networks IT-Project Management Agenda Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security 8
19 Wireless Local Area Networks (Wi-Fi) Name a secure method for the encryption of Wireless Local Area Networks (Wi-Fi). Why is Wi-Fi encryption important? What could be the potential consequences for users failing to enable encryption for their Wi-Fi network? What could be the potential harm if the data communication of the myplace service is not encrypted? Name at least one consequence from the myplace Provider as well as the mobile user perspective. Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security
20 Wi-Fi Proteced Access: WPA or WPA Unsecure Wi-Fi: Wi-Fi: Solution Data can be extracted from the local network Internet access can be used by other for free and illegal activities like file sharing Router manipulation Phone can be misused Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security 0
21 Man-In-The-Middle Attack Wi-Fi: Solution Attacker between the communication parties and he has the full control of the data traffic Eavesdrop and manipulation of data traffic Passwords, data, personal information DNS manipulation, malware E.g. Redirect online banking to a fishing site Snarfing (fake wlan access point) Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security
22 Eavesdropping on communication Wi-Fi (myplace): Solution Redirect to a manipulated service is possible Mobile user s perspective: Passwords can be stolen and an attacker can slip into this identity myplace s perspective Unsecure services results in image loss Suit for violating the legal framework Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security
23 Using Dijkstra Algorithm nd Example Wired Networks Wireless Networks IT-Project Management Agenda Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security 3
24 IT-Project Management What could be the consequences of carrying out a software development project without proper project management? Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security 4
25 IT-Project Management: Solution What are the hints for bad project management within a software development company Failed to meet project deadlines Budget overrun Results do not match with the expectations of the customer Overload of the employees, they have to work overtime to meet the deadlines Unsatisfied employees Employees consider, that they do not get positive results from the project Employees work frantically Frequent personnel turnover Project manager leaves and no replacement in sight Former Project with Similar or comparable objectives has already failed Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security 5
26 IT-Project Management Project Team What is the general problem of increasing the number of project staff members? Assume you are the IT-Project manager for the development of the myplace service and it becomes foreseeable that you will not meet the final deadline. Does it help to increase the number of project staff members? Where are the benefits, problems and limits for this approach? Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security 6
27 Project Team: Solution An one person project do not need internal communication and distribution of work Increasing the member of the project results in higher needs of communications and with that, the project duration increases On the other side the productivity of every member can be increased due to higher specialization (distribution of work) Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security
28 Project Team: Solution Example: An IT project is getting out of the hand and it is not able to meet the deadlines (-) Every new member must be incorporated and integrated (-) Overhead, higher need of communication with current employees (+) specialization in problematic areas are possible Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security 8
29 Open Questions? Questions Business Informatics (PWIN) WS 05/06, Chair of Mobile Business & Multilateral Security
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