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Articles by Bhanu Priya
Page 19 of 107
What is the role of NAT and PAT in making internet routing more efficient?
The two address translations that are helpful to make internet routing more efficient are NAT (Network Address Translation) and PAT (Port Address Translation). These technologies work together to solve the problem of IPv4 address shortage while enabling multiple devices to share a single internet connection. Network Address Translation (NAT) NAT is used to convert private IP addresses into public IP addresses and vice versa. This translation is essential due to the shortage of IPv4 addresses in the global internet. IPv4 uses 32-bit addresses, providing approximately 4.3 billion unique IP addresses. However, with the world population exceeding 7.8 ...
Read MoreWhat is the Default Gateway?
A default gateway is a network node (typically a router) that serves as an access point or IP router that a networked computer uses to send information to a computer in another network or the internet. When a device needs to communicate with a host outside its local network, it forwards the packet to the default gateway. The default gateway acts as an intermediary between the local network and external networks. It examines the destination IP address of outgoing packets and determines whether they should be delivered locally or forwarded to another network. Default ...
Read MoreWhat are the network security types?
Network security is the protection of access to files and directories in a computer network against hacking, misuse, and unauthorized changes to the system. It encompasses various technologies, policies, and practices designed to defend network infrastructure and data from cyber threats. Importance of Network Security Network security is built around three fundamental principles known as the CIA Triad: Confidentiality − Protects sensitive information from unauthorized access and disclosure. Organizations must guard against malicious actions that could compromise confidential data such as customer records, financial information, or trade secrets. Integrity − Ensures that information ...
Read MoreWhat is Basic Communication Model?
The basic communication model in computer networking represents the fundamental framework for data exchange between devices. It consists of a sender who encodes a message, transmits it through a communication channel or medium, and a receiver who decodes the message and provides feedback. Basic Communication Model Sender (Encode) Communication Channel Receiver (Decode) ...
Read MoreWhat is router architecture?
A router is a network device that forwards data packets between computer networks. Router architecture is designed to perform two essential functions: processing routable protocols and using routing protocols to determine the optimal path for data transmission. Architecture of Router A router consists of four fundamental components that work together to enable efficient packet forwarding and routing decisions. Router Architecture Input Ports Switching Fabric (Hardware) ...
Read MoreWhat is a firewall? What are the advantages of hardware and software firewalls?
A firewall is a network security device that monitors and controls incoming and outgoing network traffic based on predetermined security rules. It acts as a barrier between trusted internal networks and untrusted external networks, filtering data packets to prevent unauthorized access and cyber threats. Firewalls examine each data packet against configured rules to determine whether to allow, block, or drop the traffic. They can be implemented as hardware appliances, software applications, or cloud-based services. Firewall Network Protection Internal Network (Trusted) ...
Read MoreWhat are the different components and architectures of firewalls?
A firewall is a network security system that acts as a protective barrier between a trusted internal network and untrusted external networks like the internet. It monitors and controls incoming and outgoing network traffic based on predetermined security rules, filtering data packets to allow or block them according to the organization's security policy. Firewall System Architecture Internet Perimeter Router Firewall ...
Read MoreWhat are the functions of each layer in TCP/IP?
Transmission Control Protocol/Internet Protocol (TCP/IP) is a suite of communication protocols that enables reliable data transmission across networks. TCP handles message segmentation and reassembly, while IP manages packet addressing and routing to ensure data reaches the correct destination. TCP/IP revolutionized network communication by providing a standardized method for computers to communicate over public networks like the Internet. It defines how information is packaged, addressed, transmitted, and received between network devices. TCP/IP Four-Layer Model Application Layer HTTP, HTTPS, FTP, SMTP, SSH ...
Read MoreWhat is SD-WAN and its working condition?
Software-Defined Wide Area Network (SD-WAN) is a modern networking approach that uses software to control and manage WAN connections between enterprise locations. Unlike traditional WANs that rely on hardware-based routing, SD-WAN virtualizes network functions and enables centralized management through software controllers. SD-WAN transforms how organizations connect branch offices, data centers, and cloud services by decoupling network hardware from its control mechanism. This separation allows network administrators to manage policies, routing decisions, and security from a centralized location, providing greater flexibility and control over network operations. SD-WAN Architecture ...
Read MoreHow does the IPsec use digital certificates and digital signatures?
IPSec is one of the most secure techniques for connecting network sites. It provides comprehensive security features for packet transmission across networks, including authentication, integrity, and confidentiality. Digital certificates and digital signatures are fundamental components that enable IPSec to establish trust and verify identities in secure communications. IPSec was designed to provide the following security features when transferring packets across networks: Authentication − Verifies that the packet received is truly from the claimed sender. Integrity − Ensures that the contents of the packet didn't change in transit. Confidentiality − Conceals the message ...
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