During National Cyber Security Awareness Month in India, a study revealed that the average annual salary of a cyber security professional in India is approximately Rs. 7.5 lakhs. Beginners in the field are expected to generate this income level with their skills. However, professionals with more than a decade's experience are expected to earn approximately Rs. 22 lakhs per annum. With the increasing demand for data protection by customers and clients, businesses around the world are actively looking for IT professionals. Through a Network Security Course, you will be getting the latest updates and information about the field of Network and Cyber Security.
Keep reading to learn about the types of attacks and the many layers of protection that a network offers.
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Types of attacks on a Network
As a Network Security professional, you will come across two types of attacks on a network. In an active attack, the attacker intrudes to modify the stored data in any system. On the other hand, passive attacks are done by perpetrators who copy and view the system data. Find a detailed explanation regarding these terms below.
Active attacks: An attacker targets the system resources of an organization and attempts to modify them during an active attack. Generally, non-IT professionals are aware of such types of attacks as they are a threat to their devices and the data in them. Trojan horse, replay, SYN flood, and Denial of Service (DoS) attacks are some examples of active attacks.
Passive attacks: The network attacks that majorly go unnoticed are generally passive. It's hard to note this type of attack when it happens because the system data remains unchanged before and after the attack. Cyber security professionals also perform this attack to detect any open ports or vulnerabilities in a network to ensure a secure IT system of an organization. Eavesdropping and release of messages attacks are some of the known passive attacks in network security.
What are the layers of Network Security?
IT professionals in any organization build the network of the business based on the Open Systems Interconnection (OSI) model. From the early days of networking, computer professionals have tweaked this fundamental model by subtracting certain layers to create a custom network. However, any network across the world is based on one or many of these basic layers.
Application: The application layer is the topmost level in the OSI model of network security. At this stage, the applications get access to the services provided by a network. Email clients and web servers use the protocols in this layer (HTTP, HTTPS, POP3, etc.) to send and receive information from users to the network.
Presentation: The protocols (SSL, TLS, MPEG, etc.) in the presentation helps in encrypting, decoding, and compressing data for transmission from the session layer to the application layer.
Session: When data is transferred from one device to another, it is done through the medium of communication channels. The session layer takes complete responsibility for keeping these channels open during data transmission. SAP is a commonly used session protocol.
Transport: In the transport layer, data is segregated into segments. This heart of the OSI model layer is responsible for assembling and reassembling data segments to prepare them for use in the previous layer. UDP and TCP are some transport protocols.
Network: Data in the network layer is represented in the form of packets. The protocols in this layer (IPv6, ARP, etc.) find the best way to route packets to the destination node using Internet Protocol (IP) addresses.
Data: Here, the data is represented in the format of frames. The protocols of the Data Link layer establish and terminate connections between networks that are physically connected. ATM, Frame Relay, and PPP are some protocols of the Data Link layer.
Physical: In the physical layer, data is represented in bits. Here, the transmission of raw data takes place through protocols like 100BaseTX, RS232, and ISDN.
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Become a Cybersecurity Analyst through the Network Security Course today
A layered approach to cyber security helps in deterring attackers. It involves understanding cloud computing, remote working, and other IT environments of the business. As a Cyber Security Analyst, your job will be to check several systems, devices, etc., used by your company. You will have to back up the data on every device and test the ports to ensure a solid and secure system.
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