computer networks

Basics of cyber security

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Cyber security is a process, technique or procedure to ensure information security goals. Aim of Information Security is to provide CIA i.e. Confidentiality of information Integrity of information Availability of information   These 3 parameters (CIA) are called security goals/security services. The other security objectives also include such other parameters as authenticity, authorisation, accounting and … Read more Basics of cyber security

Challenges to Internal security through communication networks

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  Communication networks are a part of our critical information infrastructure. Communication networks refer to an interconnection of communicating entitiessuch as computers, laptops, mobiles, telephones etc. via which provides the basis for information exchange for all other sectors including voice, data, video, and Internet connectivity. Communication network should not be confused with the computer networkssuch as LAN, WAN etc. because … Read more Challenges to Internal security through communication networks

Basic element of Communication systems, data transmission mode, transmission media, network topologies, network types, communication protocols, network security mechanism.

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Elements of a Communication System Elements of a communication system The above figure depicts the elementsof a communication system. There are three essential parts of any communication system, the transmitter, transmission channel, and receiver. Each parts plays a particular role in signal transmission, as follows: The transmitter processes the input signal to produce a suitable … Read more Basic element of Communication systems, data transmission mode, transmission media, network topologies, network types, communication protocols, network security mechanism.