1. Frequency Division Multiplexing Frequency Division Multiplexing is a technique that can be applied when bandwidth of the link is greater than combined bandwidth of signals to be transmitted. Frequency Division Multiplexing technique is the process of translating the frequency of individual channel into per-assigned frequency slots within the bandwidth of the transmission medium. Different carries frequencies are assigned to different users. We can use any modulation scheme to assign carrier
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IP Closed Circuit Television and Network Convergence: Strengths and Weaknesses Scott Reinhardt John Jay College of Criminal Justice IP CCTV Strengths and Weaknesses Closed circuit television cameras have become a tool used in several countries to fight crime and to ensure the safety of the public through surveillance in public places. The use of CCTV cameras is on the rise‚ and there is little proof of areas where their use has been cut back. IP CCTV technology has been in
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between Logical & Physical Design of a Network When we look at the differences between logical design and physical design of a network it is easy to think of it as the logical as the functional part and physical as the seeing it part. With that stated there is more to this than just the functional and seeing parts. In order to understand the differences from one to the other‚ we need more information. In the following paragraphs I will try to outline what makes up the differences between logical and
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TYPES OF COMPUTER NETWORKS: A computer networks is a communication system connecting two or more computers that work together to exchange information & share resources. A network may consist of microcomputers or it may integrate microcomputers or other devices with large computer. Networks can be controlled by all nodes co-ordinarily & supply all resource. These networks differ in geographical size. There are three important types of networks. 1. Local Area Network 2. Metropolitan Area
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the untrusted network‚ the firewall‚ and the trusted network? The relationship is that data is only limited to what firewalls allow via specific places called “ports”. There is the untrusted network on the outside‚ then the firewall which prevents unwanted or suspicious connections‚ and the trusted network is what lies within the bounds of the firewall. 2. What is the relationship between a TCP and UDP packet? Will any specific transaction usually involve both types of packets? A TCP Packet sends
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Logical Design Logical design takes each piece of conceptual design and assigns it to a specific logical role within architecture. For infrastructure projects‚ the architecture might be a series of block diagrams showing networks‚ service components‚ and network connection elements. Application architecture is typically broken down into at least three levels: presentation‚ business‚ and data level. Because this is a migration project‚ the team should document the existing logical design as well
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COMPUTER COMMUNICATION NETWORKS Objectives • • • • • What is telecommunication History of telecommunication Role of telecommunication in Organizations Interpersonal communication applications Computer networks What is telecommunication? “Transmission of data or audible/visible information by electrical/electronic means” e.g. telephone‚ telegraph‚ radio‚ television‚ computer networks (Internet) Basic elements 1. Transmitter : takes information and converts it to a signal 2. Transmission
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Computer Network Specialist Abdool Samad GLC2O0-B Mr. Shin Nov. 6th ‚ 2013 The reason I have chosen a Computer Network Specialists is because I love computers of what they do and what they are capable of doing and how it has helped the humans thrive and succeed in ways other species can’t. Computer Network Specialists develop‚ install‚ and maintain the networks that connect computers to each other. Their duties are to set-up computers and install
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A network topology that is generally in a line formation‚ which uses several devices that are all connected to a common central cable called a bus and commonly used for LAN’s. Component Description Usually 2 or more desktop of notebook computers with a network interface card. A common printer is shared by all desktops or notebook computers. The server process requests and delivers data to the client computers over the internet or network.
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CS T53 COMPUTER NETWORKS UNIT I Introduction to Computer Networks: Need for Networking - Service Description – Connectionless and Connection-Oriented Services – Circuit and Packet Switching – Access Networks and Physical Media – Wireless Links and Characteristics – Queuing Delay and Packet Loss – Internet Protocol stack – OSI Reference Model - Service Models – History of Computer Networking and the Internet. UNIT II Application Layer: Principles of Network Applications – The Web and HTTP
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