![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 […]
![The Hidden Superpower of Routers – Master Virtual Routing & VRF Today [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/06/The-Hidden-Superpower-of-Routers-–-Master-Virtual-Routing_VRF-Today_networkjourney.png)
I know how confusing “virtual routing” can sound when you’re just starting to dive deep into enterprise network architecture. Believe me, I’ve been there. When I first stumbled upon concepts like VRF and virtual routers, I thought, “Is this just another fancy way to complicate […]
![Overlay Technologies for CCNP Enterprise: The Complete 2025 Guide with Labs, CLI & Exam Relevance [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/06/Overlay-Technologies-for-CCNP-Enterprise_networkjourney.png)
If you’re preparing for the CCNP Enterprise certification, there’s no escaping the importance of Overlay Technologies. Whether you’re tackling the ENARSI exam or diving deep into advanced enterprise network design, mastering overlays like VXLAN, GRE, LISP, and MPLS is critical. In this blog, we’ll take […]
![Are Hypervisors Replacing Bare Metal in 2025? Here’s What You Should Know. [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/06/Are-Hypervisors-Replacing-Bare-Metal-in-2025_networkjourney.png)
Today we’re diving into a topic I often discuss with students, clients, and fellow engineers — should you deploy your network on a hypervisor or go bare metal? When I started building labs and handling client deployments, I thought bare metal was always the “pro” […]
![Cisco LISP Protocol Explained with CLI, Labs, and Use Cases. [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/06/Cisco-LISP-Protocol-Explained-with-CLI_Labs_and-Use-Cases_networkjourney.png)
If you’ve been diving into advanced routing or enterprise-level WAN designs, you may have come across a fascinating protocol called LISP (Locator/ID Separation Protocol). When I first encountered LISP while working on inter-DC communication and traffic engineering use cases, I realized it offered something most […]
![Why Is VXLAN Better Than VLAN in Large-Scale Networks? [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/06/Why-Is-VXLAN-Better-Than-VLAN-in-Large-Scale-Networks_networkjourney.png)
If you’ve ever wondered how data centers manage large-scale Layer 2 networks over Layer 3 infrastructure, today’s topic will blow your mind — VXLAN. I still remember my first experience with VXLAN during a large DC project, where VLANs just couldn’t scale anymore. That’s when […]
