COMPUTER NETWORKS AND COMMUNICATIONS
NETWORK TOPOLOGIES AND PROTOCOLS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Distributed denial of service
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Caeser Cipher
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Plaintext
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SMTP
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Detailed explanation-1: -The Shift Cipher. Also known as the Caesar cipher, the shift cipher is one that anyone can readily understand and remember for decoding. It is a form of the substitution cipher. By shifting the alphabet a few positions in either direction, a simple sentence can become unreadable to casual inspection.
Detailed explanation-2: -Substitution ciphers. Replace bits, characters, or character blocks in plaintext with alternate bits, characters or character blocks to produce ciphertext. A substitution cipher may be monoalphabetic or polyalphabetic: A single alphabet is used to encrypt the entire plaintext message.
Detailed explanation-3: -The Caesar cipher shifts all the letters in a piece of text by a certain number of places. The key for this cipher is a letter which represents the number of place for the shift. So, for example, a key D means “shift 3 places” and a key M means “shift 12 places”.
Detailed explanation-4: -Caesar Cipher. In Caesar cipher, the set of plain text characters is replaced by any other character, symbols, or numbers. Monoalphabetic Cipher. Homophonic Substitution Cipher. Polygram Substitution Cipher. Polyalphabetic Substitution Cipher. Playfair Cipher. Hill Cipher.