professor‚ Faculty of Information Technology Engineering‚ Damascus University‚ Syria Abstract – Data network is the nervous system and the heart of digital information transferring‚ it’s hold all applications information such as data‚ voice and video and due to this issue reliability of the data network is the critical mission to keep our digital life and business running 24 by 7‚ protection the data network in term of availability in the past was relaying on hardware and resources duplication
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and IT data center. The areas that use the 1000Base F are responsible for the clinical areas. They include: radiology‚ operating rooms‚ wards‚ ICU’s‚ emergency rooms‚ labs‚ and pharmacy. For a failsafe‚ the entire hospital has a complete power backup system that automatically cuts over to a large diesel motor generator set. The hospital uses a network bridge to interconnect its logical network. A network bridge connects multiple network segments at the data link layer‚ which is Layer 2 of the
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types and some typical application. The report will start with an overall introduction to wide area network‚ and then identify the key characteristics of this technology. Generally‚ the data transmission rate of wide area network is lower than local area network (LAN)‚ but with the development of technology‚ this data transmission rate is improved dramatically‚ it could achieve 2.4 Gbps or even higher currently. Thus‚ it could meet a great number of requirements. After that‚ it will analyze the key
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Assignment in Computer Science 1 1. IMAP (Internet Message Access Protocol) -is an application layer that allows an e-mail client to access e-mail on a remote mail server. It supports both on-line & off-line modes of operation. The current version‚ IMAP version 4 revision 1 (IMAP4rev1)‚ is defined by RFC 3501. 2. POP (Post Office Protocol) -is an application layer Internet standard protocol used by local e-mail clients to retrieve e-mail clients to retrieve e-mail from a remote
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security measures that are associated with each level of the Open Systems Interconnect (OSI). Physical layer This layer is responsible for moving raw bits from one node to another: electrical impulse‚ light or radio signals. This layer represents the physical application security. It includes access control‚ power‚ fire‚ water‚ and backups. Many of the threats to security at the Physical layer cause a Denial of Service (DoS) of the enterprise application‚ making the application unavailable to enterprise
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the sublayers contained in the Data Link Layer (DLL) of the Open Systems Interconnection (OSI) model. The MAC layer provides addressing and channel access control mechanisms‚ and works to transmit data from one Network Interface Card (NIC) to another across a connected network. Carrier Sensed Multiple Access with Collision Detection (CSMA/CD) is the process used by non-switched Ethernet to detect a clear channel between devices helping to decrease the chance of data “colliding” during transmission
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Krahenbill 10/25/09 Executive Summary Link Systems was founded in 2005 as an Internet based self help center for people that are starting their own businesses. We have a proven track record of business start up expertise. We have helped several hundred businesses get moving in the right direction. We are focused on improving the position of small businesses‚ ultimately‚ helping them to reach the success that they are working on for their company. Link Systems is in business to help your business
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few requirements when building a network in order for the network to operate. There is the hardware components with the end nodes (i.e. the sending and receiving computers). The intermediate nodes that perform the data exchange (i.e. ‚ switches‚ and hubs). And the telecommunication links (i.e. wired &
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not be declared. In any case‚ this copyright notice must never be removed and must be reported even in partial uses. GPRS - 2 © M. Baldi: see page 2 Generalities Based on the existing GSM infrastructure Packet switching functionality Better data transfer rates Statistical multiplexing Traffic based billing Migration Path to 3G Networks GPRS - 3 © M. Baldi: see page 2 Service Types Point-to-Point Internet access by user Point-to-Multipoint Delivery of
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Logical and Physical Network Design Logical and Physical Network Design Network design is a process that begins from the first thought on how to connect to computers together in order for them to communicate and pass needed data to each other. The process may seem simple on this level and may require little consideration‚ but in fact‚ there are many areas of the network that need to be examined before the process of networking should be undertaken. For the small network‚ these considerations
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