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IP Calculation problem

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    Tracy
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    I have a school assignment about IP that I wanna get help.

    Case Description
    A company plans to set up a number of local area networks (LANs) for its divisions as follows:

    ■sales division [LAN-SA: 25 computers; 1 file server; 1 network printer]
    ■marketing division [LAN-MA: 18 computers; 1 file server; 1 network printer]
    ■purchase division [LAN-PU: 12 computers; 1 file server; 1 network printer]
    ■accounting division [LAN-AC: 4 computers; 1 network printer]
    ■human resource division [LAN-HR: 5 computers; 1 network printer]

    All computers will be able to access the Internet. The existing network equipment that the company has is listed below:

    ■one router (to connect to the Internet)
    ■two 4-port routers
    ■two 4-port switches
    ■two 24-port switches
    ■one 48-port switch

    The private CIDR IP (v4) address ranged from 192.168.1.0 – 192.168.1.255 is used for all the computers and network devices for the company. Each device obtains its IP from a DHCP server when it is switched on.

    (a) Suppose a fixed-length subnet mask is used, what should it be? Show all the relevant calculation. Give the range of IPs for each LAN.

    (b) Suppose a fixed variable-length subnet masking (VLSM) technique is used, show all the relevant calculation. Give the range of IPs for each LAN.

    thankssssss

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