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Symmetric EncryptionThis encryption method makes use of same “secret key” to encipher and decipher the message and it is termed as private key encryption. This type of encryption methods uses mathematical operations so it is efficient needs only minimal processing. Both sender and receiver should possess encryption key. If any copy of key is compromised, an intermediate can decrypt and the read messages which was being sent.The several methods of symmetric encryption techniques are as follows:•Data Encryption Standard (DES) – It is one of the popular symmetric encryption cryptosystems that uses 64-bit block size of plaintext and 56-bit key. This method is adopted by NIST in the year 1976 as federal standard for encrypting non-classified information.•Triple DES (3DES) – This method is formed to provide security far beyondDES.•Advanced Encryption Standard (AES) – This technique was developed to replace DES and 3DES both.
802.11 WIRELESS LANs AND CSMA/CA: IEEE 802.11 is standard wireless LAN that needs radio signals at 2.4GHz. Its speed is 11Mbps. The older computers use radio signals at data
DATAGRAM REASSEMBLY Recreation of original datagram is known as reassembly. Ultimate receiver acts reassembly as given below.Fragments can reach out of order. Header bit check
To master the complexity one must apply the given points. CONCENTRATE IN UNDERSTANDING THE CONCEPTS: Instead of details of wires used to connect computers to a specif
Question: a. State briefly three reasons why computer networks are used? b. Differentiate between simplex, half-duplex and full-duplex mode of transmission. c. State any
Problem (a) Distinguish between passive and active attacks. (b) Give two reasons why it is important to organise security awareness programs for users. (c) Describe how
Computer networks are defined by four factors which are as given below: 1) NETWORK SIZE: According to the size of networks. 1) Local Area Network ( LAN) 2) Wide Area Ne
Vulnerability Identification Specific avenues threat agents can exploit to attack an information asset are known as vulnerabilities. Examine how each threat can be generated and
The Cost Benefit Analysis (CBA) Formula CBA determines that whether the control alternative being evaluated is worth cost incurred to control vulnerability or not. CBA easily ca
IPV6 NEXT HEADER It is given in the figure below:
Hardware, Software, and Network Asset Identification What information attributes to track is dependent on: • Requires of organization/risk management efforts • Management
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