EVPN-VXLAN separates a data-center fabric into an IP underlay and an overlay that can extend Layer 2 and Layer 3 services across that underlay. VXLAN […]
Networking
Juniper JN0-650: Junos Class of Service Fundamentals
Junos Class of Service, or CoS, controls how packets are classified, queued, scheduled, dropped, shaped, and marked as they pass through a device. It is […]
Juniper JN0-664: Junos EVPN, VPLS, or L2VPN?
Service-provider Layer 2 VPN terminology can make several technologies look interchangeable when they solve different problems. A point-to-point pseudowire, a BGP-signaled Layer 2 VPN, VPLS, […]
Juniper JN0-664: Junos MPLS L3VPN Troubleshooting
MPLS Layer 3 VPN failures are easiest to troubleshoot when the engineer follows the route instead of jumping between commands. A customer prefix has to […]
EC-Council 312-38: Defense in Depth for Enterprise Networks
Defense in depth is the deliberate use of independent security layers so that one failed or bypassed control does not expose the entire enterprise. The […]
EC-Council 312-38: Network Attack Surface Management
Network attack surface management is the ongoing process of identifying the systems, services, identities, and trust paths that can be reached or abused, then reducing […]
Juniper JN0-232: Understanding NAT on Juniper SRX
Network address translation on an SRX firewall becomes much easier to troubleshoot when each NAT type has a clear purpose and the Junos processing order […]
Juniper JN0-253: Marvis Actions vs Marvis Minis
Marvis Actions and Marvis Minis both support proactive operations in Juniper Mist, but they solve different parts of the troubleshooting problem. Actions surface issues that […]
ISC2 SSCP: 802.1X and Network Access Control
IEEE 802.1X is a port-based network access control standard used to control whether a device or user can gain normal access through a wired or […]
CompTIA Cloud+ CV0-004: Cloud Network Segmentation
Cloud segmentation is the practice of dividing workloads, services, users, and management paths into security boundaries that limit unnecessary communication. For CompTIA Cloud+ CV0-004 practitioners, […]
Cisco 350-601: Fibre Channel Zoning, NPV, and FCoE
Cisco data-center storage networking combines Fibre Channel access control, scalable fabric design, and—where still appropriate—Ethernet convergence. The active 350-601 DCCOR scope includes Fibre Channel, NPV, […]
Cisco 350-601: Automating Cisco Nexus and ACI
Cisco data-center automation spans device APIs, configuration-management tools, controller APIs, and infrastructure-as-code workflows. The active 350-601 DCCOR scope includes NX-API, Python, Ansible, Terraform, and ACI […]
Cisco 350-801: Building a CUCM Dial Plan
A CUCM dial plan is the logic that turns what a user dials into a controlled routing decision. In the current Cisco 350-801 CLCOR scope, […]
Cisco 350-801: SIP Trunks and CUBE Troubleshooting
SIP troubleshooting becomes much easier when signaling, media, routing, and security are treated as separate layers. A failed call across CUCM, Cisco Unified Border Element […]
Cisco 350-801: Collaboration Media Resources
Cisco collaboration calls do not always need an extra media resource, but when endpoint capabilities and call features do not line up, the right resource […]