Please enable JavaScript.

Coggle requires JavaScript to display documents.

Computer Science (CPU (Common components and their function (The…

- - - - Pros
        
        Highspeeds and bandwidth - Frame Relay packet switch tech.
        
        Ease of Implementation - Service provider handles data transport link.
        
        Scalable - Equipment cost (CPE) is the same independent of bandwidth
        
        Multiple connections - Redundancy
        
        Technology to choose - no one-size-fits-all solution
        
        Frame Relay, HDLC, PPP
        
        ISDN (PRI,BRI), T1, T3, DSL, Dialup
      - Cons
        
        Equipment is expensive
        
        WAN connection handled by the provider. Provider must correct data transport link problems.
        
        Routing would be much more complex - determine exactly where each subnet would be advertised.
        
        More options - connectivity that would need to be considered.
        
        Expensive - bandwidth at a cost.
    - - Pros
        
        Speed: Speed of data transfer is significantly faster than wireless and not sensitive to dead spots within the practice as sometimes is encountered with wireless
        
        Cost: Relatively inexpensive to initially install and very low maintenance cost thereafter. The average cost for each network drop (outlet) is approximately $100; however, if a full office is being set up, this cost can be negotiated down.
        
        Network security: The network must be protected by a firewall and should be set up by a professional networking expert who can ensure that the correct ports are being switched on and other security features enabled. Once done, the network is generally well protected.
        
        Stability: Local networks are very stable and, once correctly configured, are workhorses that do not cause many problems or require much maintenance. They are generally more stable than wireless networks, although wireless is improving all the time.
      - Cons
        
        Mobility: Once the network drops are installed, there is limited ability to move a different location without setting up additional switches and running cables.
        
        Server: In very small networks, it is possible to set up a local network without a server. However, once there are more than five computers in use, it is advisable to install a high powered and high capacity server. The server stores centralizes information across a medical office. In medical offices, due to the amount of data being moved and the need for centralized storage for documents, you should have a server. This requires ongoing maintanace and greater cost, as you will need to purchase software licenses, anit-virus software, etc.
- - - - Type of storage is magnetic
      - Data access is Direct (i.e. not serial access like a tape)
      - Hard disks hold a vast amount of data and are relatively cheap, so on a per-byte basis they are the amongst the cheapest form of storage, although magnetic tape is cheaper.
      - Capacity can be a Terabyte or more.
      - An internal hard disk is faster than external storage devices. it is however, slower than internal solid state memory (SSD) which are now appearing in top end computers.
      - An internal hard disk is not intended to be portable - it is screwed to the computer chassis as a permanent fixture unless a replacement is needed.
        An external hard disk used for backing up data is portable as it comes in various pocket-sized or larger cases, but it is larger than a DVD USB memory stick.
      - Very durable, it can last for years if treated carefully.
        Can be damaged by being dropped, experience extreme heat or strong magnetic fields.
        Data can be written to it and deleted from an infinite amount of times.
      - As long as it is not damaged, a hard disk is very reliable. The system detects any failed area on the disk surface and prevents data being written in that spot (these are called 'bad sectors').
    - - Advantages and disadvantages
        
        Cheapest form of storage per megabyte of storage
        
        Can store large amounts of data - up to 1 Terabyte per tape cartridge
        
        Can be set up to do the back up overnight or over the weekend
        
        Serial access so can be quite slow to access data
        
        Need a special piece of equipment to record and read the data on the tape.
        
        The data may be corrupted if the tape is placed near a strong magnetic field e.g. a large speaker or magnet