Talk about IT THEORY , Hardware specifics like , cpu , cu , alu , registers , serial prcoessing , parallel processing , hypherthreading and multiprocessing , processeor cache , ram , latency , system clock , buses , external buses , secondary storag e , types of catching and differnece like disk cache , web cashe and broswer cache , then system software , bios , cmos , kernel , irretupts , virtual memmory , high levle and low leve lmagauge , translators , multitasking , mutithreading , compilers , interpretors , machine code generation , machine cycle in depth like fetch , code , store , then local area networks , twisted pair cables , advantages and diasdvantges , unbounded connection media , utp cable , bounded connection media , wirless , bluetooth , radio waves , types of toplogy and advantages disadvantges and ues , network addresses , ip addresses , mac addreses , internet protocals , network interface card , bridge , packets , switch , router osi model , transport layer and other layers , header , payload , trailer , frame , wmn wirless mesh network advantages of mesh toplogy and disadvantges ,