Wednesday, July 26, 2023

Internet Protocols

 




Internet Protocol (IP): IP is a fundamental network protocol used for routing data packets across networks. It provides logical addressing (IP addresses) to devices connected to the internet or a private network, allowing them to communicate with each other.

Transmission Control Protocol (TCP): TCP is a connection-oriented protocol that operates in the transport layer. It provides reliable, ordered, and error-checked delivery of data between applications running on devices. TCP establishes a connection, acknowledges data receipt, and retransmits lost packets if necessary.

User Datagram Protocol (UDP): UDP is also a transport layer protocol but is connectionless and provides unreliable data delivery. It is suitable for applications that require faster data transmission but can tolerate some data loss, such as real-time streaming and online gaming.

Hypertext Transfer Protocol (HTTP): HTTP is an application layer protocol used for web browsing. It governs the communication between web browsers and web servers, enabling the retrieval and display of webpages and other resources.

Simple Mail Transfer Protocol (SMTP): SMTP is an application layer protocol used for sending and relaying email messages between email servers. It ensures that emails are routed to the correct destination servers.

File Transfer Protocol (FTP): FTP is an application layer protocol designed for transferring files between computers on a network. It provides a standardized way to upload, download, and manage files on FTP servers.

Secure Shell (SSH): SSH is a secure network protocol used for secure remote access and command execution on networked devices. It encrypts the data exchanged between the client and the server, providing secure communication.

Internet Control Message Protocol (ICMP): ICMP is an integral part of IP and is used for diagnostic and error reporting purposes. It helps detect network problems, such as unreachable hosts or network congestion.

Border Gateway Protocol (BGP): BGP is an exterior gateway protocol used in large-scale networks, such as the internet, to exchange routing information between autonomous systems. It is responsible for making routing decisions to determine the best paths for data transmission.

Dynamic Host Configuration Protocol (DHCP): DHCP is a network protocol that dynamically assigns IP addresses and network configuration information to devices when they join a network. It simplifies network administration by automating the IP address allocation process.

Internet Protocol Security (IPsec): IPsec is a suite of protocols used to secure internet communication by encrypting and authenticating data at the IP layer. It is commonly used to establish secure virtual private networks (VPNs).




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Saturday, July 22, 2023

Top Network Diagram Software & Tools




Enterprise networks are constantly expanding, and especially in the age of cloud computing, edge computing, and 5G, the capabilities and types of network components are quickly diversifying. It’s difficult to navigate a large network, whether you’re looking to troubleshoot a performance issue, find the site of a security breach, or audit the general makeup of your users and devices. With a network diagram, especially one that automatically updates through network diagram software, users of varying backgrounds can easily visualize the most important features and connections on the network. Read on to learn more about some of the top network diagram software and tools that can help you develop a better understanding of your enterprise network.

What Is a Network Diagram?

A network diagram is a visual representation of all of the connections on a network. With a comprehensive network visualization, viewers can see how devices, connections, pathways, and data flows are currently set up on their network.

Some of the main approaches to network diagramming include:

Manual network diagram

This type of network diagram may be useful for larger networks because you can manually draw network components and connections at a granular level. However, your diagram will need to be audited and updated frequently as your network changes over time.

Semi-automated network diagram

The semi-automatic approach to network diagramming automates the process of auto-discovery, or automatically identifies new devices as they join the network. However, users are still tasked with manually making the diagram connections.

Automated network diagram

This approach automates the device discovery phase and auto-generates a network diagram to match the changing network in real time. This type of diagram solution typically offers templates, stencils, and other features, though it lacks some of the customizability in manual and semi-automated diagram tools. 

Logical network diagram

Logical network diagrams are focused less on the physical hardware and applications on a network and more on how and why everything connects the way it does. A logical network diagram typically includes information about subnets, routing protocols, and hardware like firewalls and routers that show how data flows from place to place.

Physical network diagram

A physical network diagram is more like a blueprint. It focuses on showing the physical layout of hardware and how every cable, router, and device physically connects.

Important Network Diagram Tool Features

  • Data and diagram sharing: There are several reasons why a network diagram tool user might want to share their diagram with outside users or applications. Look for tools that offer native or third-party integrations for collaboration tools, as well as the ability to share diagrams with office suites and other diagram applications.
  • Customizability: Every network layout and diagramming need is different. Look for solutions that allow you to make manual adjustments to the layout, the design library, and other features as needed. Open source models in particular offer high levels of customization to users.
  • Design and visualization templatesMost network diagramming tools include extensive design libraries for shapes, icons, stencils, and templates. Check with the sales team to see if their visualization features match your needs and/or if you can add to the design library on your own.
  • Import and export flexibilityIt’s common for enterprise networks to switch from one diagramming tool to another as their needs change. That’s why it’s important to invest in tools that easily import and export diagram data, either directly to the other tool or via user-friendly file formats.

Top Network Diagram Software

SolarWinds Network Topology Mapper : 

SolarWinds Network Topology Mapper is an automated network mapping and diagramming solution that allows you to schedule automated network scans for diagram updates at your preferred times. NTM is a great solution for users who want the ease of use that an automated solution provides, but still want a tool that is friendly to larger network setups. With its focus on developing multiple maps, multi-layer discovery, and regulatory compliance, this SolarWinds solution makes it possible for network administrators to update and troubleshoot their network with just a few clicks to automate the process.

Key Features:

  • Automation for device discovery and mapping
  • Single-scan approach to building multiple maps
  • Auto-detect for network topology changes
  • Features for regulatory PCI compliance
  • Diagram exports compatible with Microsoft Visio


Top Pro: Network Topology Mapper offers a wide variety of real-time alerts to users, especially when used in partnership with Network Configuration Manager and Netflow Traffic Analyzer.

Top Con: Some users say that the user interface is not very intuitive, especially when working with the SolarWinds API.


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    Friday, July 21, 2023

    What Is a Flat Network? Definition, Benefits, and How It Works

     



    A flat network is a type of network architecture where all the devices in the data center can reach each other without having to go through intermediary devices like routers.

    In a flat network, all devices are linked to a single switch, meaning that all the workstations connected to the flat network are part of the same network segment. Since all devices are connected to a single switch, it becomes one of the easiest network designs to manage. It is also very cost-effective.

    Intermediate System to Intermediate System (IS-IS), Interior Gateway Routing Protocol (IGRP), and Routing Information Protocol (RIP) are some examples of flat network routing protocols.


    What is a flat network and how do they work?

    Flat networks are network architectures where all devices are connected to a single network segment without any hierarchy or central control. In a flat network, all devices are connected to a single switch or hub in the same broadcast area and communicate with each other without any intermediaries. These connected devices are considered peers with the same level of access.

    Unlike a hierarchical network, where devices are segmented by intermediary hardware like routers, in a flat network, there is no hierarchy or division of a network into layers. When one connected device (A) sends a communication to another device (B), then all ports (we’ll call them X, Y, and Z) connected to the switch forward the exact same broadcast message—except the one that received the broadcast, in this case, device B. Ports X and Y may not need that information, yet they waste precious bandwidth in forwarding the message regardless. This happens because there is no logical segmentation, which restricts the traffic to non-designated devices.


    Benefits of flat networks

    Partially due to their simplicity, flat networks have a number of advantages, including their inexpensiveness, low learning curve, and speed of data transfer.

    Cheap to set up

    One benefit of flat networks is how cheap they are to set up. That’s because there’s no need for multiple routers and switches, as everything is connected back to a single switch, with low-cost hubs providing additional connectivity where necessary. In addition, since flat networks don’t require complex routing information, specialized design, or training, they significantly reduce internal IT costs.

    Easy to set up

    When compared to mesh or star topologies, flat networks are simple and easy to set up. Because of this simplicity, it’s very easy to design a flat network. Not a lot of thought has to go into architecting it, so it’s easy to build, easy to operate (when it’s working properly, that is) and easy and cheap to maintain.

    Flat network issues and drawbacks

    Although flat networks are cheap and easy to set up in any environment, several drawbacks in its architecture cannot be ignored, including their lack of redundancy, difficulty troubleshooting, and vulnerability to lateral attacks.

    Who should use a flat network?

    Flat networks are ideal for home user networks, mobile broadband operators, and small businesses primarily because of the cost savings associated with flat architecture over more complex systems. They’re easy to set up and don’t require costly hardware or complicated software to communicate with each other. Flat networks are also convenient for organizations with employees spread in different locations since they simplify the process of sharing resources through connected devices.

    Flat network alternatives

    Flat networks make it relatively easy for threat actors to access the entire network through a single entry point and quickly transmit malicious payloads throughout the system. In such a scenario, ransomware doesn’t take long to spread through the system, leaving flat networks vulnerable to widespread and pervasive cyberattacks.

    A way out is to adopt a comprehensive defense-in-depth (DiD) strategy that helps protect your networks from cyberattacks. Network segmentation is a crucial part of a DiD security approach.

    Network segmentation


    Network segmentation is the process of splitting a network into smaller networks or subnets. Barriers are placed between the subnets, thus preventing interactions between them. With each subnet working as an independent unit, it prevents lateral movement and makes it difficult for malicious actors to take over the entire system. Therefore, one of the biggest benefits of network segmentation is that it improves security. Additionally, even if there is an attack, network segmentation isolates the attack to only that particular network, thereby preventing its spread to the rest of the network.



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    Tuesday, July 18, 2023

    Network Administration

     



    Network administration aims to manage, monitor, maintain, secure, and service an organization's network. However, the specific tasks and procedures may vary depending on the size and type of an organization.


    Example of network administration

    It often includes maintenance of network facilities in individual machines, such as drivers and settings of personal computers as well as printers and such. It sometimes also includes maintenance of certain network servers: file servers, VPN gateways, intrusion detection systems, etc.


    Different types of network administration

    These operational areas are fault management, configuration management, accounting management, performance management and security management, also known as FCAPS. Each network management subdiscipline incorporates several operational elements. Here is a rundown of the different types of network management.


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    Neural Network Coding – Fraunhofer Heinrich Hertz Institute



    Neural coding (or Neural representation) is a neuroscience field concerned with characterising the hypothetical relationship between the stimulus and the individual or ensemble neuronal responses and the relationship among the electrical activity of the neurons in the ensemble.

    A neural network is a method in artificial intelligence that teaches computers to process data in a way that is inspired by the human brain. It is a type of machine learning process, called deep learning, that uses interconnected nodes or neurons in a layered structure that resembles the human brain.

    Neural networks are broadly used, with applications for financial operations, enterprise planning, trading, business analytics, and product maintenance.



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    Friday, July 14, 2023

    The Importance of Effective Asset Management in Today’s Cloud Environments



     
    In today’s cloud-focused network environments, organizations have experienced a significant shift in the development and deployment of IT assets. With the advent of cloud technology, the deployment process has become much simpler and more efficient but often lacks centralized change management. The shared responsibility model associated with the cloud allows for more rapid deployment and scaling but can also have security impacts if not well managed and understood. This newfound ease has another potential cost – the challenge of effectively managing these assets.

    Gone are the days when IT assets were confined behind on-prem firewalls, where security configurations were manually set by administrators. In those rigid environments, deploying new internet-facing assets required a complex change management process, with collaboration between network and security teams to optimize and balance functional and security requirements – with the move to cloud and hybrid environments, that burden has been reduced. Anyone with the appropriate administrative privileges can now deploy new internet-facing assets on the cloud and connect them to the internal network without extensive optimization.

    While this enhanced efficiency and scalability has benefits, it often leads to a lack of visibility and control over IT assets. As organizations race to scale, they frequently lose track of the number of assets operating within their networks. These invisible and unmonitored assets can serve as backdoors for threat actors, enabling them to deliver sophisticated cyberattacks. It is extremely common for these types of assets to serve as an initial entry point or enable lateral movement in penetration testing and red teaming.

    What are the risks of poor asset management?


    Consider a scenario where a business deploys a new SSH server to provide third-party contractors with access to critical resources. If the SSH server is not proactively secured, any underlying vulnerabilities and risks may go unnoticed. Threat actors are quick to exploit such vulnerabilities, using automated malicious bots to scan the web for unpatched or vulnerable assets, leading to potential cyberattacks.

    Furthermore, security teams often fail to recognize that third-party applications used by external entities to connect to an organization’s servers should be considered integral parts of the wider IT asset landscape. This oversight can also be attributed to the proliferation of remote working. Since the pandemic, more businesses have embraced remote work, resulting in increased usage of remote access solutions. The rapid move to remote and hybrid working meant the adoption of remote access and BYOD solutions had to be expedited and in some cases that security debt still needs to be paid. This type of rapid shift often circumvents change management processes creating blind spots within an environment.

    How can organizations prioritize asset management?

    To address these issues, organizations must place emphasis on effective asset management. A robust asset management strategy integrated into business processes enhances the security team’s operational efficiency. It provides a clear overview of the assets to monitor, enables optimization of security policies for different assets, and facilitates the configuration of existing solutions for better security. This, in turn, maximizes the return on investment from security solutions and professionals and ensures compliance with relevant regulations such as PCI-DSS, HIPAA, and NIST.



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    Chia Network Launches CODE Framework: Infrastructure for the Open Metaverse

     


    SOUTH SAN FRANCISCO, Calif.--(BUSINESS WIRE)--Chia Network, Inc. ("Chia" or the "Company") today announced the launch of its Chia Open Digital Economy (“CODE”) framework with initial efforts focused on supporting the video game industry in its path to a more open metaverse. Providing a sustainable and compliant public on-chain infrastructure, CODE enables game developers to incorporate their creative work into the web3 digital economy, cultivating a flourishing ecosystem for creators and consumers.

    Chia’s proof-of-concept game, ChiaTCG, spearheads the launch of the CODE framework. The open-source reference game demonstrates the ease of extensibility of digital assets across IPs and ecosystems, offers a jumpstart to adoption among video game developers, and provides commercial viability for developers leveraging Chia’s NFT1 standard for IP licensing protections and on-chain enforced royalties in perpetuity. Leveraging Chia Offers, trades done directly between the players without needing a marketplace or exchange, mitigate risk and allow gamers a parallel digital ownership experience to physical card trading today.

    "The metaverse as it exists today is just a marketing ploy and loss leader for blockchains with little substance or utility," said Gene Hoffman, CEO and President of Chia Network. "We're approaching the metaverse challenge, and pain, from both the creator and consumer experiences, to overhaul the foundation of the digital economy. We’ve been building to this moment for some time - our blockchain and primitives provide real solutions to the challenges we’ve identified.”

    To further support adoption efforts, CODE will offer a blockchain abstraction layer that enables web2 developers to integrate their games into the open digital economy. The Company expects the abstraction layer to be completed by the end of 2023. Chia's innovative approach addresses the challenges and friction points in the metaverse, ensures adherence to regulatory standards, and promotes long-term sustainability. As a founding member of the Open Metaverse Foundation, a Linux Foundation Project, Chia promotes interoperability standards for the open digital economy.

    “Players should be able to move their usable digital assets from one game to another – this has been the promise and aspiration of metaverse gaming,” said Richard Tsao, Chief Metaverse Officer at Chia network. “Thus far, we’ve seen unfinished and reductive web3 products leaving players and studios wanting. The metaverse doesn’t deliver yet. We want to realize the dream that allows digital ownership in the open metaverse, and when done correctly, we believe we’ll see a viable solution for gamers and creators.”

    About Chia Network

    Chia Network built a better blockchain to drive real-world use and application. Founded by Bram Cohen, inventor of BitTorrent, Chia provides a secure, sustainable, and regulatory-compliant blockchain setting the standard for the infrastructure of digital currency and inclusive access to global, decentralized finance. Through the innovative Proof of Space and Time consensus algorithm, Chia Network's public, open-source blockchain leverages hard drive space to create the first new Nakamoto Consensus since Bitcoin in 2009.



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    Tuesday, July 11, 2023

    Cisco vision takes networking to the cloud in a big way

     



    Cisco is taking the wraps off an overarching architecture it expects will let enterprise customers manage and control its vast arsenal of networking hardware and software for years to come.

    The Cisco Networking Cloud, unveiled at this week’s Cisco Live! customer event, will involve a broad range of software and cloud system integration and has as its ultimate, if somewhat vague, goal to converge networking platforms over time, culminating in a unified management platform that works on premises or cloud for improved visibility and enterprise automation, according to Jonathan Davidson, executive vice president and general manager of Cisco Networking.

    “We are bringing together campus and branch, data center, compute, IoT, SD-WAN, and more. Cisco Networking Cloud binds the applications under Cisco Networking, including Meraki, ThousandEyes, and Cisco Catalyst to act as one. In addition, The Cisco Networking Cloud replaces isolated pockets of data with telemetry, assurance, and proactive analytics across the network,” Davidson said.

    “We see this as a way of simplifying our existing portfolio by converging and connecting fragmented platforms that exchange data through automation and deliver a unified experience that lets organization manage their Cisco networking products from a single place.”

    That single place will primarily be integration enabled through Cisco’s cloud-based Meraki dashboard, which can manage and troubleshoot a wide variety of devices and networks from a single screen or its on-premises DNA Center central management platform, now called Catalyst Center.

    Cisco Networking Cloud is important as it addresses a substantial weakness, according to Andrew Lerner, vice president with Gartner. “From a product perspective, the biggest challenge for Cisco continues to be integrating existing and acquired products and teams into more cohesive solutions that enable enterprise clients to modernize their IT systems,” Lerner said.

    “Since Cisco acquired Meraki, some customers have been asking a simple question: ‘Why can’t we have this simple, cloud-based management experience with all Cisco products?’ Not just simple, but unified. One cloud-based console that manages switching, Wi-Fi, security, routing, SD-WAN,” said Shamus McGillicuddy, research director for the network-management practice at Enterprise Management Associates.

    “Skilled network engineers have traditionally preferred discrete, technical management interfaces that allowed them to dig deep into functionality when configuring and managing devices. Now there’s less time for that. Engineering teams are understaffed and overworked. So simpler, unified management experiences are essential. That’s what Cisco is aiming for,” McGillicuddy said.

    Better visibility

    In addition to SSO, Cisco said it will more tightly integrate the Meraki dashboard with its ThousandEyes network-intelligence gathering software. It will include the technology in its WebEx collaboration package as well as with Meraki MX security and SD-WAN devices to more easily monitor those environments to determine when user experience is less than ideal and to pinpoint failures.

    “Adding ThousandEyes support to those environments means that we are adding over a million additional potential endpoints inside of the infrastructure to make it easier for customers to deploy and get visibility from,” Davidson said.

    The company is also bolstering its Cloud Management for Catalyst package by adding the ability to troubleshoot and more easily manage Catalyst devices. Largely for monitoring those devices until now, customers will be able to do things like streamline packet capture and see the command line interface with the dashboard and troubleshoot problems, Davidson said.

    The Nexus Dashboard will provide real-time and historical insights for power consumption of all IT equipment in their data center and estimate the energy footprint of their data center operations, Davidson said.



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    Networking, security initiatives dominate IT spending priorities

     



    Network connectivity and security are key areas for IT investment as well as potential barriers to global success, according to new research.


    Nearly half of CIOs claim that establishing and managing connectivity in new markets is the single most critical factor when it comes to ensuring successful global expansion, according to Expereo, which surveyed 650 large enterprise and mid-market CIOs across Asia, Europe and North America for its research. In addition, 49% of CIOs report that their board views global connectivity as “a business-critical asset to growth.”

    Yet challenges remain. The most prevalent connectivity concerns that CIOs say they’re dealing with are network performance issues (cited by 37% of respondents), expanding connectivity into new markets (37%), and the constraints of legacy platforms (35%).

    “Businesses must be able to anticipate change and flex, scale, and adapt faster than ever. How? By transforming into cloud-first, data-driven, digital enterprises,” said Ben Elms, chief revenue officer at Expereo, in the network service provider's Enterprise Horizons report. “This requires a network that is not only optimized for success today, but one that’s future-ready, too—a network capable of keeping up with evolving demands.”

    Driving demand for more flexible, scalable IP networks is the fact that the nature of work has changed. Existing workers and new hires expect to be able to work from home, and “the effort to support remote workers with similar levels of security and performance as they would experience if working in the office complicates CIOs’ connectivity challenges,” the report states.

    IT budget growth and spending priorities

    In the big picture, CIOs remain optimistic about future growth despite ongoing economic uncertainty. More than half (56%) of the global CIOs surveyed have successfully secured increased technology budgets in 2023, according to Expereo’s research. The study also found that 32% of respondents describe their organizations’ attitude for the next 12 months as “ambitious,” while another 29% identify as “optimistic” for the coming year.

    In terms of budget priorities, networking and security initiatives dominate the list of investments that CIOs have earmarked for increased spending. According to the research, CIOs will focus on:

              Security (cited by 44%)5G (42%)
              AI/ML (41%)
             Automation and analytics (40%)
             Internet of Things (38%)
             Public/hybrid cloud (38%)
             Edge computing (37%)
             SaaS (36%)
             SASE (33%)
             WAN (32%)
             MPLS VPN (30%)
             SD-WAN (26%)

    Plans to invest in internal talent

    The changing nature of work is also driving CIOs to invest in existing talent as skills shortages continue to plague the IT industry. With 49% of businesses struggling to find cybersecurity experts and 41% having trouble filling artificial intelligence (AI) and machine learning (ML) roles, CIOs are turning to their own talent to close the skills gap.

    According to the Enterprise Horizons report, 46% of surveyed CIOs said they are upskilling teams, and 46% said they are increasing AI and automation to deliver the talent resources needed for business growth. Other approaches to help with talent resources include outsourcing system management (38%), increasing recruitment efforts (36%), and reassigning resources (34%). Unfortunately, deprioritizing projects (28%) and cutting headcount (23%) are the reality for some CIOs.

    The changing workforce does offer CIOs access to a more global workforce of remote employees. The survey found 43% have expanded hiring options, while 38% manage a team which is scattered across markets.

    “The competition for talent is real. There are few skilled experts for key new technologies, and they are in high demand,” the report states. “CIOs are using internal upskilling for critical needs.”




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