Computing Topics to Revise

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  • Created by: brynclark
  • Created on: 07-06-17 14:07
L O J F Q N D X Q D J I J T N T G G X O D
G H U G V O I C F T A M N R L F Q N N P B
N U J F Y I R A U Y J M G A G M V I I N N
I Q W Y C T E R S P L E N N A W P S D X F
H Y F E N A C Q U E A D I S F W F S X O L
C S H D E C T R G F A I H M P U V E E D R
T N Y F T I A C Q L E A C I U Q S R L P N
I X P I S L D A E I P T T S K Y P D A A T
W O N P I P D H F P M E I S E Y O D B K W
S Q Q R S P R W T F G A W I Q S B A U A X
T R O K N A E P I L O D S O D A W D Y B C
E V B V O P S V G O G D T N P D S E M N I
K T A B C I S L G P Q R I M O X Y X L A U
C Q A E D P I W T S O E U E O N T E L S V
A A D G I C N J C N Q S C D W N K D O R O
P H S U C T G Q A K W S R I D V G N T P E
I U S M A N J D C H B I I A D Q N I T T F
A S Y M M E T R I C E N C R Y P T I O N L
W M U Y R C X O P K P G B F E I G Y F K L
A R E K H D N V M K N H S F Y U C Q V T T
K F L D W F K N T L J N K U D X T A C B U

Clues

  • A sequential logic circuit that can store one bit and flip between two states, two inputs, a control input and a clock signal (1, 4, 4, 5)
  • Any change in the database must retain the overall state of the database (4, 11)
  • Circuit switching creates a direct link between two devices for the duration of the communication. E.g. Public telephone system. Packets must be sent and received in the same order (7, 9)
  • Different keys for encryption and decryption, known as public and private keys, more secure (10, 10)
  • Physical medium to transmit data, older slower coaxial copper cables, and quicker fibre optic cables (12, 5)
  • The Address given is not actually an address but the required value. LDA 43 would mean load the value 43 into the accumulator (9, 10)
  • The address given is the location of the data to be used. E.g. LDA 43 loads the contents of memory location 43 into the accumulator (6, 10)
  • The value given is added to the value stored in the index register to give the memory location. E.g. if the value in the index register is 100, LDA 43 will take the value in the memory address 143 and load it into the accumulator (7, 10)
  • This is a method of communicating packets of data across a network on which other similar communications are happening simultaneously. Data arrives in a series of packets and is reassembled. (6, 9)
  • Uses protocols relating to the application being used, e.g. HTTP for the browser. (5, 11)

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