Sunday, November 30, 2014

Binary I

To get into field of any software engineering you must know a few number systems. You guessed it right; one of them is binary!

  • Binary is a numeric system which uses two numerals to represent all real numbers.: typically 0 (zero) and 1 (one).
  • Binary number systems are usually represented in octets, meaning that there are 8 binary numbers per octet for example: 00000000 or 10101011
  • Binary is useful in resolving IP addresses, decoding decimal values and more. 

  • In the binary numbering system, the radix is 2. Therefore, each position represents increasing powers of 2. In 8-bit binary numbers, the positions represent these quantities:
    • 2^7 2^6 2^5 2^4 2^3 2^2 2^1 2^0 = 128 | 64 | 32 | 16 | 8 | 4 | 2 | 1

  • A 1 in a certain position means we add that value to the total. A 0 means we do not add that value. For example the binary number 0110000 has a 1 in the 2^6 position (decimal value 64) and a 1 in the 2^5 position (decimal value 32). The remaining bits are all 0 so we do not add the corresponding decimal values. The result of adding 32+64 is 96, the decimal equivalent of 01100000.
  • Each octet is made up of 8 bits or 8 binary numbers and each bit has a value, either 0 or 1. The four groups of 8 bits have the same set of valid values in the range of 0 to 255 inclusive.

  • If there is a 0 in a position, do not add the value.
  • If all 8 bits are 0s, 00000000, the value of the octet is 0.
  • If all 8 bits are 1s, 11111111, the value of the octet is 255 (128+64+32+16+8+4+2+1)
  • If the 8 bits are mixed, the values are added together. For example, the octet 00100111 has a value of 39 (32+4+2+1)

Monday, November 10, 2014

New updates & topics

Greetings, it has been a while since my last post, however, I am back!
  • Since the last topic which was Deep web, we will go to the genera of networking and Cisco internet work operating system.
  • There will be posts about packet tracer tutorials to set the user up for practicing with such interfaces.
  • Fortunately there will be a post about CG&P in which is mainly relevant to networking applications.
  • Expect posts  starting 2015, cheers!

Friday, May 30, 2014

Deep Web 10 And Final! Recent Developments

For Previous Post Click Here

Even though Deep Web has become popular, many sites maybe as many as 50% has been taken off from the space.

      It was alleged that Marques was the founder of Freedom Hosting, which hosted many of the .onion sites found on the deep web, utilising 550 servers all over Europe and offering space to anyone who wanted it, with a promise never to look at the contents personally – and it later came to light that he was perhaps one of the most important men on the deep web, at least in terms of the distribution of  pornography. However, Marques and his family are protesting his innocence, claiming that all Marques did was rent web space and it was nothing to do with him that it so happened that this webspace was used for illegal activities.

The deep Web is only getting deeper. Its store of human knowledge and trivialities grows more massive every day, complicating our efforts to make sense of it all. In the end, that's perhaps the biggest challenge behind the Internet that we've created.

And of course, its darker side will always be lurking, too, just as it always does in human nature. The deep Web speaks to the fathomless, scattered potential of not only the Internet, but the human race, too.

More Info? HowStuffWorks