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INTRODUCTION TO CRYPTOGRAPHYCryptographyThe word cryptography is derived from Greek words kryptos, which means hidden and graphein, meaning to write, this is the process of making and by using codes to secure transmission of the information.EncryptionEncryption is the procedure of converting an original message into a form which is not readable by unauthorized individuals.DecryptionDecryption is process of converting cipher text message back into plaintext.CryptanalysisCryptanalysis is process of obtaining original message from encrypted message without knowing the algorithms and keys used to perform encryption.CryptologyCryptology is science of encryption that combines cryptography and cryptanalysis both
The Role of the Investigation The first phase, investigation is the most significant. What problem is the system being developed to solve? During investigation phase, objectives
QUESTION A small ISP requests your help. The technicians report that they have had no downstream access to the Internet. They believe the problem lies with their access provide
COLLISION DETECTION The signals from two devices will interfere with each other and the overlapping of frames is known a collision. It does not cause to the hardware but data
for making the assignment
Computer networks is a complex subject due to the given reasons: MANY DIFFERENT TECHNOLOGIES EXIST: The first reason for the complexity of networks is that there are s
IDS RESPONSE BEHAVIOR Once IDS detects an anomalous network situation, it has a number of options. IDS responses to external stimulation can be classified as active or passive.
In broadcast topology there are further two types 1) SATELLITE\RADIO 2) RING TOPOLOGY In a radio or satellite topology every computers are connected to each other via radio o
(a) What are the different architectures for wireless networks? (b) Explain how WEP authentication and encryption works, describe the vulnerability. (c) In what ways are secu
Access Controls Access controls addresses admission of a user into a trusted area of organization. It comprises of a combination of policies & technologies. The ways to control
Question 1 a) What is a NMS? Question 2 Explain about Structure of Management Information Question 3 A)In which UDP port number does a protocol entity receive message?
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