2019-2020-1 semester 2092412 "Introduction to cyberspace security professionals," the second week of learning summary

And fourth gate circuits Chapter
4.1 computers and electrical
1. Boolean expressions
2. logical blocks: a graphical representation of the circuit
3. The truth table: list of all combinations of inputs A door likely to be encountered and the corresponding output
4.2
NAND: an inverter (X = A ')
and the door: an all-1, there are 0 0 (X = AB)
or door: 0 0 full, there is a 1 (X = A + B)
XOR door: 0 with a different
NAND gates: aND gate and the opposite
NOR gate: and an opposite gate or
tris (poly) input gate
4.3 of the configuration
transistors: a semiconductor (electric wire or resistor)
of the source (output terminal, carrying high level), a base (to control the source is grounded), an emitter (ground)
low level (off), the high level (ON)
and the gate + = NAND gate NAND
or NOR gates = + NAND gate
4.4 circuit
4.4.1 combining circuit
combining circuit: the output circuit is only determined by the input value of
the timing circuit: the output circuit is a function of the current state of the circuit and the input value
circuit equivalent: the distributive law, associative, commutative, identity, complement , de Morgan's law
4.4.2 adder
adders: two of the braking circuit for adding
half adder: calculating a two-digit and the carry and generating the correct circuit
Full Adder: calculating a two-digit and, taking into account the circuit (configured by two half-adder) carry input of
4.4.3 multiplexer
multiplexer (n input lines, n-th power of 2 outputs possible)
4.5 memory circuit
X, Y are always complementary, by controlling the S, R, 0 or 1 may store circuit
4.6 IC
IC: i.e., the chip is embedded in a plurality of gate silicon
4.7CPU chip
CPU having an input line is only a advanced circuitry and output lines
Chapter calculation section
5.1 member independent computer
cache is typically integrated in the processor chip of small, fast storage medium.
CPU, · display, GPU, model, a digital camera, a main memory, secondary storage, DVD drive, a wireless network, a battery, USB, physical size, weight, preinstalled software
concept 5.2 storing a program
addressability: memory each addressable memory location bits
arithmetic logic unit: performs arithmetic and logic operations of the computer component
registers: the CPU in a small storage area for storing intermediate data or special values.
The input / output unit is a channel of communication with the outside computer
control means: controls other components of
CPU: a combination of an arithmetic logic unit and a control unit
address: decision data source or the flow of data
control information: address and data flow management
5.2.2 Read take - execute cycle
to read the next instruction
decipher instruction
, if needed, obtain data
execution instruction
5.2.3RAM and a ROM
the RAM: random access memory (volatile having a)
a ROM: not change, only burned in the production and assembly the bit combinations
5.2.4 secondary storage device
Magnetic tape, magnetic disk (track, sector),
a method to measure the efficiency of a magnetic disk drive: seek time, waiting time, access time and transfer efficiency
5.2.5 touchscreen
resistive touch screens, capacitive touch screen, infrared touch screen, a surface optical wave
5.3 Embedded system
5.4 parallel architecture
5.4.1 parallel computing
bit level, instruction level, data-level, task-level
5.4.2 classification parallel hardware
multi-core processor