[T]Simple Network setup In an I-cafe

Discussion in 'Internet cafe business' started by lordmight, Feb 21, 2009.


  1. lordmight

    lordmight Guest




    I'm just goin' to post this one, IJMO, different meaning about servers, network setups, or any other. Just to clarify and share a lil knowledge, all comments are well accepted.

    What is a Network?
    n-A network includes two or more objects, which interacts to each other.
    What is a Computer Network?
    -a computer network is composed of two or more, computers, connected to each other, via a device or a cable.

    Definition of terms:

    * Switch -

    A network switch is a computer networking device that connects network segments.

    The term commonly refers to a Network bridge that processes and routes data at the Data link layer (layer 2) of the OSI model. Switches that additionally process data at the Network layer (layer 3 and above) are often referred to as Layer 3 switches or Multilayer switches.

    The term network switch does not generally encompass unintelligent or passive network devices such as hubs and repeaters.
    * Hub -

    A network hub or repeater hub is a device for connecting multiple twisted pair or fiber optic Ethernet devices together and thus making them act as a single network segment. Hubs work at the physical layer (layer 1) of the OSI model. The device is thus a form of multiport repeater. Repeater hubs also participate in collision detection, forwarding a jam signal to all ports if it detects a collision.

    Hubs also often come with a BNC and/or AUI connector to allow connection to legacy 10BASE2 or 10BASE5 network segments. The availability of low-priced network switches has largely rendered hubs obsolete but they are still seen in older installations and more specialized applications.
    * Modem -

    Modem (from modulator-demodulator) is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information. The goal is to produce a signal that can be transmitted easily and decoded to reproduce the original digital data. Modems can be used over any means of transmitting analog signals, from driven diodes to radio.

    The most familiar example is a voiceband modem that turns the digital 1s and 0s of a personal computer into sounds that can be transmitted over the telephone lines of Plain Old Telephone Systems (POTS), and once received on the other side, converts those 1s and 0s back into a form used by a USB, Ethernet, serial, or network connection. Modems are generally classified by the amount of data they can send in a given time, normally measured in bits per second, or "bps". They can also be classified by Baud, the number of times the modem changes its signal state per second.

    Baud is not the modem's speed in bit/s, but in symbols/s. The baud rate varies, depending on the modulation technique used. Original Bell 103 modems used a modulation technique that saw a change in state 300 times per second. They transmitted 1 bit for every baud, and so a 300 bit/s modem was also a 300-baud modem. However, casual computerists confused the two. A 300 bit/s modem is the only modem whose bit rate matches the baud rate. A 2400 bit/s modem changes state 600 times per second, but due to the fact that it transmits 4 bits for each baud, 2400 bits are transmitted by 600 baud, or changes in states.

    Faster modems are used by Internet users every day, notably cable modems and ADSL modems. In telecommunications, "radio modems" transmit repeating frames of data at very high data rates over microwave radio links. Some microwave modems transmit more than a hundred million bits per second. Optical modems transmit data over optical fibers. Most intercontinental data links now use optical modems transmitting over undersea optical fibers. Optical modems routinely have data rates in excess of a billion (1x109) bits per second. One kilobit per second (kbit/s or kb/s or kbps) as used in this article means 1000 bits per second and not 1024 bits per second. For example, a 56k modem can transfer data at up to 56,000 bits (7kB) per second over the phone line.

    Source: http://www.en-wikipedia.com

    [hr]
    Simple Network Setup Using Switch
    [​IMG]

    All the computers at the same network much more preferred as LAN(Local Area Connection) were connected via a device called switch(as the sample shown) or a hub, there's a big difference between a Switch and a Hub. see definition of terms this is just a simple network setup, connected using a network cable, which 8C8P cables, or also known as RJ45 were commonly use.

    what is a network cable?

    One of the Important factor in networking is the binding that connects all available objects within the network. What is this binding? A network Cable acts like a spider-web that connects a single strand to the other strands.

    For more info
     
    thegloves likes this.
  2. lordmight

    lordmight Guest




    This is a simple network setup with a net connection using a Router
    [​IMG]

    The ADSL line, is connected to the ADSL port of the router, and the router is connected to a switch, where the switch acts like a medium or a node/host, to redistribute the Internet connection on the same network.

    This is a simple network setup (Internet Cable)
    [​IMG]
    Where the internet cable is connected to a cable modem(motorola) then the modem is connected to a router, and the router is connected to a switch.


    This is the common Internet Cafe Network Setup
    [​IMG]
    Where the modem is connected to the ISP, then the Router is connected to the modem, while the server is only connected to the router for instant Firmware access, and the router is connected to the switch, where all WS(workstation) is connected.

    A network with a Network Hard Drive also known as Snap Drives.
    [​IMG]

    what is a network harddrive? a network harddrive is much more like an external Hard drive, which is connected to a switch, hub or a router, in order for all Computer units to access, store, change, read/write, all files, or a file.
     
    thegloves likes this.
  3. infant

    infant Member




    first of all no aggressive reaction po sana pure informative lng sana, I'm honestly saying na di ko pa tlaga alam yung mga techinical side about server. like Apache http server and its limitations. Basic concept lng tlaga ako naka base.

    diba same din po ng concept pag nag hohost ka ng game?

    Game serve -------Wan--------Game Client

    Web Server --------Wan--------Browser (client Application)

    ganun din nmn po ang concept sa Icafe di po ba? kaya lng LAN lng.

    ServerApplication---------LAN---------Client Application

    dipendent din naman, di po ba?
     
    thegloves likes this.
  4. lordmight

    lordmight Guest




    yup tama, lets say sa timer po,

    Web server=ICMS installed sa server
    then yung WAN = LAN
    browser = is the Workstation.

    ang web server, hindi gagana yung site kung walang server, di din siya pupunta at coconnect at makikita sa browser kung walang WAN, at ang browser ay walang silbi kung walang lumalabas.

    like sa icafe, ang workstation hindi gagana kung walang LAN, kung may nakainstall na client software dun sa workstation, ibig sabihin kahit may LAN maghahanap ng server connection, kung walang icafe server with ICMS na installed walang silbi ang workstation.
     
    thegloves likes this.
  5. lordmight

    lordmight Guest




    oh btw, it doesn't matter kung WAN, LAN or PAN pa siya, hangga't may kanya kanyang tasks, ang mga units, dun sila magkakaiba. Like the icafe server, serves as the timer, POS, encoding unit, or pedeng maging daan kung saan nakaconnect ang printer, thru shared printer and fax.
     
  6. lordmight

    lordmight Guest




    like this one
    [​IMG]


    hindi magagamit lahat ng application, or available valid processes ng isang Workstation with a client installed sa kanya, lets say for example, like a workstation with a cafeagent, di siya magagamit ng guest users kung hindi siya ioonline sa icafe server, but with admin privilege, pwedeng iclose lang ang cafeagent or inuninstall ang cafeagent, without the server's consent, kapag naclose ang cafeagent, with admin permissions, or ang admin mismo ang nagclose pwede na nyang magamit lahat ng available applications, valid processes sa isang workstation, but unlike sa mga guest users, or what we call customers, na hindi alam ang passkey to override ang isang ICMS client, eh indeed na necessity ang server.

    parang bridge ang cafeagent. para matawid ang kabilang banda.
     
  7. Warlock1981

    Warlock1981 Member




    Thanks for this, nice post LM :)
     
  8. lordmight

    lordmight Guest




    np sir, kasi medyo naguluhan kami dun sa kabilang thread dito ko na lang pinost para share ng knowledge, am no pro kaya for sure mas madami pa ako matututunan sa mga magrereply dito hehe.
     
  9. dyoddyowel

    dyoddyowel Member




    Nice effort...

    Nominated for sticky, although di ko pa nababasa ng buo (just skimmed thru it) hirap mgbasa ng long post pag phone lang gamit...

    Tagal ko na gusto gumawa ng guide like this dami kc nagtatanong about setup pero lagi ako wala time at busy, pag me free time naman tinatamad naman ako, hehe...

    Buti na lng gumawa ka na...
     
  10. lordmight

    lordmight Guest




    hehe kasi po nagkaron po ng onting complication dun po sa kabilang thread regarding an icafe serverm kaya naisipan ko po magpost hehe. btw lahat po ng suggestions, comments are well accepted naman po.
     
  11. lordmight

    lordmight Guest




    add ko lang po.

    In the figure shown below, how an icafe server plays an important role to WS.
    [​IMG]

    [​IMG]
    in the figure 1.0 the WS acts like a bridge, but there's a gate blocking the bridge which is the Cafeagent. In order to remove the gate, we need a key, the key is the command coming from the server in order to open the gate, so the WS user can use all available applications.

    without the command from the server, the WS can't use all application residing to the other side. If the key was lost, the gate wouldn't be open.
     
  12. JamesCooper

    JamesCooper Member




    YES!!! bookmarked already... thanks LM!!!
     
  13. lordmight

    lordmight Guest




    np po sir.
     
  14. kwiki

    kwiki Member




    Nice post LM!
     
  15. greekolo

    greekolo Member




    nice LM keep it up..
     
  16. lordmight

    lordmight Guest




    What is an Internet Protocol Address known as IP?

    We all know there's a certain IP within a network or a connection. An Ip address is a 32bit number in IPv4. For example 192.168.0.1 is a= class B,class B,class A,class A IP, but how can we define classes? Later on we'll be on that. An IP is a tiny but still a part of a network.

    What is this 32bit number?(Note: Please Do Correct me If am wrong)
    As the figure shown below:
    [​IMG]

    How can we get IP classes?

    A 32bit number is composed of (2)16bit numbers
    A 16bit number is composed of (2)8bit numbers
    An 8bit number is composed of (2)Nibbles
    What is a nibble? A 4bit number in actual.
    A nibble is composed of 2bit number
    A 2bit is composed of single bit number.

    [​IMG]


    This is a Class A structure
    [​IMG]
    you can determine if an IP is a class A IP, by where the zero is located at the network side.

    This is a Class B structure
    [​IMG]

    where the zero is located at the 2nd bit of the 16bit structure, if the zero is located at the first bit it will be a Class A IP.

    A class C structure
    [​IMG]
    the zero is located at the third bit of a 24 bit network, if the zero is located at the first bit it will be a class A, if the zero is located
    at the second bit it will be a class B, so therefore, this is the structure of a class C IP.

    bWhat is the IP range of classes?
    Class A
    [​IMG]
    By adding the counting numbers at the top of the binary codes.

    for example:
    for the class A IP
    all the counting numbers that has an On/I binary as follows: 64,32,16,8,4,2,1

    Therefore by adding
    64+32+16+8+4+21

    we'll get the sum of 126

    but how we define the IP ranges from?

    From the figure shown, the Network is the first table, then the Host/node is the second table. Therefore the network is the word (FROM) and the host/node is the word (TO)

    From the sample, there's no I/ON in the network table so the Class A IP ranges from 0-126.

    Class B Ip Range
    [​IMG]

    As you can notice, the zero is placed at the second bit of both network and node structure. therefore it was classified as class B Ip

    Class C IP range
    [​IMG]
     
  17. lordmight

    lordmight Guest




    thanks po mga master, tsaka dito na rin po mag post po about sa networking, para po macompile lahat hehe. based pa po kasi to sa turo sakin dati ni papa sa bulacan, about bits and bytes.
     



  18. Hi LM...

    Your sticky here is very well done and the info is amazing.

    My question though (which I posted on a different thread...sorry) is how could a user, such as myself, be able to use an IP of a Class-C structure when I browse or use the Net. Is this done through a software (what), a request to the ISP, a manual input I can do to my system....how?

    Thanks...
     
  19. iancortis

    iancortis Member




    yeahhh... nice one bro LM..
     
  20. lordmight

    lordmight Guest




    A request from your ISP which is PLDT, so, someone told me Class D IP was the most important class in IP classes(correct me if am wrong sirs) . If you want to speedup your internet browsing, you can use alternative DNS servers such as OpenDNS, sometimes the connection depends on DNS server. That's why I asked the gurus here, for alternative DNS servers of PLDT. I think sir zack can help you find the thread.
     
                                 

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