Wildcard Advanced QoS Strategies for Enterprise Networks This post covers advanced QoS strategies for enterprise networks, including traffic classification and marking, LLQ and CBWFQ queuing, the differences between shaping and policing, DSCP trust boundaries, and how to validate QoS policies using Cisco tools. It provides practical CLI examples througho
Wildcard Network Automation with Python and Netmiko This post introduces network engineers to automating CLI tasks using Python and Netmiko. It covers connecting to devices, sending show commands, pushing configuration changes, and scaling scripts across multiple devices with practical code examples throughout.
Wildcard Exploring Infrastructure as Code with Ansible for Networking This post introduces Infrastructure as Code with Ansible for networking, covering why Ansible is a strong choice for network automation, how to write playbooks for tasks like VLAN configuration, and how to use Jinja2 templates for scalable configuration management. It includes practical CLI example
Wildcard Career Advice for Network Engineers: Beyond Certifications Certifications are a starting point, not a career strategy. This post covers the skills, habits, and visibility tactics that actually drive career advancement for network engineers, including automation, Linux, cloud networking, and communication.
Wildcard Network Packet Captures: Analyzing with TShark TShark is the command-line packet analysis tool used by network engineers to capture and troubleshoot live and recorded network traffic. This post walks through practical TShark commands including interface selection, live capture, display filtering, and field extraction. It includes real CLI examp
Wildcard Building a Home Lab with Meraki: A Practical Guide This practical guide walks network engineers through building a Meraki home lab from scratch, covering hardware acquisition, Dashboard setup, a starter topology, and key features to explore. It also introduces the Meraki API as a natural extension of hands-on lab work. Ideal for anyone looking to g
Wildcard Network Automation Tools: Ansible vs Puppet vs Chef Ansible, Puppet, and Chef are three leading network automation tools, each with a distinct approach to managing infrastructure. This post compares their architecture, language, learning curve, and network device support to help you choose the right tool for your environment. Most network engineers
Wildcard 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.
Wildcard 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.
Wildcard 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.
Wildcard 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.
Wildcard 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.
Wildcard 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
Wildcard 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
Wildcard 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.
Wildcard 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.
Wildcard 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.
Wildcard 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.
Wildcard 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.
Wildcard 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.
Wildcard 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.
Wildcard 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.
Wildcard 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.
Wildcard 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.
Wildcard 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.
