![Wireshark Filter Mastery: Pro-Level Tips for Layer 2 & Layer 3 Packet Analysis [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/07/Wireshark-Filter-Mastery_Pro-Level-Tips-for-Layer-2_Layer-3-Packet-Analysis_networkjourney.png)
As a network trainer and hands-on engineer, I’ve seen engineers struggle not with capturing packets—but with filtering them effectively in Wireshark. Trust me, if you don’t filter the noise, your packet captures become digital haystacks. That’s why in this post, I’m sharing battle-tested Wireshark filter […]
![Mastering IP SLA in Cisco Networks: Setup, Configuration & Real-World Use Case [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/07/Mastering-IP-SLA-in-Cisco-Networks-Setup-Configuration-Real-World-Use-Case_networkjourney.png)
As someone who’s been deep into routers and switches for over a decade, I’ve seen how critical IP SLA becomes when ensuring uptime and performance in real-world networks. Whether you’re working in enterprise, ISP, or data center environments—knowing how to configure, monitor, and troubleshoot IP […]
![Ultimate Comparison: NetFlow vs sFlow – Insights [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/06/Ultimate-Comparison_NetFlow-vs-sFlow-–-Insights_networkjourney.png)
I know firsthand how critical choosing the right traffic monitoring tool is—be it for CCNA/CCNP preparation, network optimization, or troubleshooting. Today, we’ll decode two powerful technologies: NetFlow and sFlow. We’ll break down what they are, how they work, and which one suits your network—all in […]
![SNMPv2 vs SNMPv3: Secure and Scalable Network Monitoring [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/06/SNMPv2-vs-SNMPv3-Secure-and-Scalable-Network-Monitoring_networkjourney.png)
we’re diving into a classic comparison every network engineer must understand—SNMPv2 vs SNMPv3. If you’re preparing for CCNA, CCNP, or actively working with NMS (Network Management Systems), this topic is your foundation for monitoring, managing, and securing enterprise-grade networks. In many real-world deployments, SNMP (Simple […]
![Mastering Syslog Levels and Configuration in Cisco Networks [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/06/Mastering-Syslog-Levels-and-Configuration-in-Cisco-Networks_networkjourney.png)
We’re diving into one of the most underutilized yet powerful tools in network troubleshooting—Syslog. Whether you’re a CCNA, CCNP aspirant, or a working professional in a NOC/SOC environment, having a deep understanding of Syslog Levels and Configuration will save you hours of guesswork and help […]
![ACLs: Named vs Numbered – Which One Should You Use? [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/07/nj-blog-post-named-numberd.jpg)
Access Control Lists (ACLs) are among the first tools you reach for when you want to secure or control traffic. But when it comes to Named vs Numbered ACLs, many learners (and even working professionals) hesitate — unsure which one to use, when, and why. […]
![Can ARP ACLs Replace DHCP Snooping for ARP Security? Let’s Find Out! [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/07/nj-blog-post-ARP-ACLs.jpg)
I always say in my trainings — “Security doesn’t start at the firewall; it starts at the access port.” You’d be surprised how easy it is for an attacker to spoof an ARP reply and become the man-in-the-middle in your enterprise network. This is where […]
![Mastering DHCP Snooping and Binding Table: Secure Your Layer 2 Network Like a Pro [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/07/nj-blog-post-dhcp-snooping-binding-table.jpg)
I’ve had this discussion countless times with my students — “What if someone plugs in a rogue DHCP server and hijacks the IP allocation process?” Trust me, this isn’t just a theoretical concern. In modern LAN environments like shared offices, college campuses, and enterprise floors, […]
![From Zero to Secure: 802.1X + MAB CLI Walkthrough with Labs[CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/06/nj-blog-post-802.1.jpg)
I am going to simplify one of the most powerful port-based access control mechanisms in enterprise networking — 802.1X with MAB (MAC Authentication Bypass). When configured properly, it ensures secure access for both corporate-managed devices and non-802.1X-capable endpoints like printers, IP phones, or legacy hardware. […]
![How to Lock Down Cisco Switch Ports with Port Security (2025 Guide)[CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/06/nj-blog-post-portsec-switchport.jpg)
Today I’m breaking down a simple yet powerful security mechanism every network admin should understand — Port Security on Cisco switches. Whether you’re working on a small LAN setup or enterprise-grade infrastructure, enforcing MAC address-level access at the port can go a long way in […]
