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Designing Redundant Networks: Best Practices

Learn essential best practices for designing redundant networks that maximize uptime and reliability. Covers physical layer redundancy, protocol optimization, and real-world design patterns with practical Cisco examples.

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QoS in VoIP: Ensuring Quality Communication

Learn how Quality of Service (QoS) ensures reliable VoIP communications through traffic prioritization and bandwidth management. Covers DSCP marking, Low Latency Queuing, and end-to-end QoS implementation strategies.

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Using EVE-NG for Enterprise Network Simulation

EVE-NG is a powerful network emulation platform for creating realistic enterprise network simulations using real vendor images. It offers superior web interface and performance compared to GNS3, making it ideal for hands-on networking practice with authentic enterprise equipment and scenarios.

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Deploying Cisco ISE for Secure Network Access Control

A comprehensive guide to deploying Cisco ISE for centralized network access control, covering architecture planning, initial configuration, device integration, and policy implementation for secure network environments.

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Advanced Wireshark Techniques for Network Troubleshooting

Learn advanced Wireshark techniques including sophisticated display filters, stream analysis, time-based troubleshooting, and expert information features. Master the tools professional network engineers use for complex packet analysis and network problem resolution.

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Kubernetes Networking: Pods, Services, and Ingress Explained

This post explains how Kubernetes networking works through three core layers: pods get ephemeral IPs via CNI plugins, Services provide stable endpoints with load balancing, and Ingress controllers route HTTP traffic with advanced features. Understanding this flow from external traffic to applicatio

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Network Security Fundamentals: Threats and Defences

This post covers essential network security fundamentals including common attacks like MAC flooding, VLAN hopping, and ARP spoofing, along with their corresponding defenses such as port security, DHCP snooping, and 802.1X authentication. Practical CLI examples demonstrate how to implement each secu

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MPLS vs VPN vs SD-WAN: Picking the Right WAN

A comprehensive comparison of MPLS, IPsec VPN, and SD-WAN technologies for enterprise WAN connectivity, covering performance, cost, complexity, and ideal use cases for each approach.

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ACLs Deep Dive: Standard, Extended, and Named

Comprehensive guide to Access Control Lists covering standard ACLs (source filtering), extended ACLs (granular protocol/port control), and named ACLs with proper placement strategies and wildcard mask usage.

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Zero Trust for Beginners: What It Is and What It Is Not

Zero Trust security model explained in plain terms for beginners, covering identity verification, device posture, least privilege, and network segmentation. Includes a practical implementation roadmap for small businesses without the typical cybersecurity buzzwords.

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Inside a Firewall: Stateful vs Next-Gen in Plain English

This post explains how firewalls actually work internally, covering stateful connection tracking, state tables, NAT integration, and how next-generation firewalls add application awareness and user-based policies.

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VoIP Explained: How Your Voice Becomes Packets

This post explains VoIP basics including how voice becomes data packets, the roles of SIP and RTP protocols, codecs, and common issues like jitter and latency. It emphasizes why QoS is crucial for maintaining call quality.

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DHCP Deep Dive: DORA Process and Relay Agents

This post explains the DHCP DORA process (Discover, Offer, Request, Acknowledge), DHCP relay agents using ip helper-address for multi-VLAN environments, and DHCP snooping security features. It covers lease times and renewal processes essential for network operations.

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Latency vs Bandwidth: Why “Fast Internet” Feels Slow

Learn the crucial difference between latency and bandwidth, and why high-speed internet can still feel slow. Includes practical examples from gaming, video calls, and file downloads, plus simple tests to measure both metrics.

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NAT Deep Dive: Static, Dynamic, and PAT

Comprehensive guide to configuring and troubleshooting all three NAT types on Cisco routers: static NAT for one-to-one mapping, dynamic NAT with IP pools, and PAT for port-based translation. Includes practical configuration examples and debugging techniques.

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DNS Deep Dive: How Name Resolution Actually Works

A comprehensive walkthrough of DNS name resolution, covering the journey from stub resolver to authoritative servers, DNS record types, and practical tools like dig and nslookup. Includes DNS caching and TTL concepts for complete understanding.

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Network Automation Project: Backup All Configs to Git

Complete network automation project combining Python, Netmiko, and Git to automatically backup device configurations. Script connects to network devices, retrieves running configs, and commits them to version control with timestamps for change tracking.

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How CDNs Work: Caching, POPs, and Faster Websites

Learn how Content Delivery Networks (CDNs) use geographically distributed Points of Presence (POPs) to cache content closer to users, reducing latency and improving website performance through strategic caching headers and TTL management.

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Understanding the OSI Model with Real Examples

A comprehensive walkthrough of the OSI model's 7 layers with real-world examples, showing exactly what headers get added at each layer and how devices operate at different levels. Covers encapsulation process and maps theoretical concepts to practical networking scenarios.

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Undersea Internet Cables: The Real Backbone of the Web

Explores how submarine fiber optic cables carry 99% of international internet traffic, including landing stations, redundancy systems, and what happens when cables break. Covers the invisible physical infrastructure that powers global internet connectivity.

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Data Centres 101: Racks, Power, Cooling, and Redundancy

A beginner-friendly tour of data centre infrastructure covering server racks, power systems (UPS, generators, PDUs), cooling strategies (hot/cold aisles), and redundancy concepts that enable high availability.

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What Is Anycast? Why DNS and CDNs Love It

Anycast allows the same IP address to exist in multiple locations, automatically routing traffic to the nearest server. This explains why DNS providers and CDNs rely heavily on Anycast for improved latency and automatic failover.

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BGP for Beginners: How the Internet Picks Routes

BGP is the internet's routing protocol that determines how data travels between networks worldwide. This beginner-friendly explanation covers Autonomous Systems, peering relationships, and why BGP misconfigurations can cause massive internet outages.