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WHAT IS CLIENT/SERVER DEFINISI - Client / server menggambarkan hubungan antara dua program komputer di mana satu program, pelanggan, membuat permintaan perkhidmatan daripada program lain, pelayan, yang memenuhi permintaan tersebut. Walaupun pelanggan / idea pelayan boleh digunakan oleh program dalam satu komputer, adalah idea yang lebih penting dalam rangkaian. Dalam sebuah rangkaian, client / server model menyediakan cara yang selesa untuk menyambung program-program yang diagihkan secara cekap di lokasi yang berbeza. transaksi Komputer menggunakan pelanggan / pelayan model sangat umum. Sebagai contoh, untuk menyemak akaun bank anda dari komputer anda, sebuah program pelanggan di depan komputer anda meminta anda kepada program pelayan di bank. Program tersebut pada gilirannya meneruskan permintaan untuk program pelanggan sendiri yang menghantar permintaan ke pelayan database di komputer lain bank untuk mengambil baki akaun anda. Baki tersebut dikembalikan semula ke pelanggan bank data,

Topology in Network Design Think of a topology as a network's virtual shape or structure. This shape does not necessarily correspond to the actual physical layout of the devices on the network. For example, the computers on a home lan may be arranged in a circle in a family room, but it would be highly unlikely to find a ring topology there. Network topologies are categorized into the following basic types: bus ring star tree mesh More complex networks can be built as hybrids of two or more of the above basic topologies. Bus Topology Bus networks (not to be confused with the system bus of a computer) use a common backbone to connect all devices. A single cable, the backbone functions as a shared communication medium that devices attach or tap into with an interface connector. A device wanting to communicate with another device on the network sends a broadcast message onto the wire that all other devices see, but only the intended recipient actually accepts and processes the message

For Kevin Mitnick, staying legal is job No. 1 Hacker Kevin Mitnick is conscientiously working on his image. Kevin Mitnick was eager to participate in a social-engineering contest at the Defcon hacker conference in Las Vegas last weekend and was told he would target Microsoft in the event. He figured it would be fun to show off his schmoozing skills, which he so easily used to trick employees at tech companies in the 1990s into handing over passwords and other sensitive information, ultimately landing him in jail. But when he called his attorney to run it past him, the response was "Are you crazy?!" Mitnick's lawyer, who declined to be interviewed, advised his most famous client that wire fraud statutes can be broadly interpreted such that any interstate commerce (phone calls) conducted to defraud someone, even if it is part of a contest, could be construed as a violation, according to Mitnick. Mitnick was able to get source code and other sensitive data from companies us