Subject-matter expert
Keith Barker
Keith Barker discovered a love for computers and networking in 1984 and began his IT career in 1985 at Electronic Data Systems (EDS). He has worked with companies including Paramount Pictures, Blue Cross, and several government agencies. Keith loves to teach and spends most of his time creating fun and useful videos for CBT Nuggets.
Credentials
Certifications Keith Barker holds
Vendor-issued credentials Keith holds — the hands-on IT background behind the courses your team will train on.
- Cisco CCIE (2x)
- CISSP
- Network+
- Security+
- VMware
- Palo Alto
- Check Point
Training coverage
Courses that carry Keith Barker's expertise into your team plan
Use these courses as proof of coverage for the roles and technologies your team needs to support.
Courses Keith Barker teaches
37 courses
Cisco
CCNA Cybersecurity
This CCNA Cybersecurity training prepares you for the Understanding Cisco Cybersecurity Operations Fundamentals (200-201 CCNACBR) v1.2 exam (formerly called Cisco CyberOps). With virtual labs and unlimited practice exams included, you’ll gain experience with SIEM, NetFlow, tcpdump, malware analysis, access control models, and incident response workflows based on NIST.SP800‑61. You'll also learn how to detect network, application, and endpoint threats, investigate attacks like DDoS or man‑in‑the‑middle, and apply defense‑in‑depth. This course is deal for entry‑level security analysts or engineers ready to earn their CCNA Cybersecurity certification and launch an SOC career.
Cisco
CCNP ENCOR
Advance your networking career with this CCNP ENCOR (350-401) v1.2 training, and get ready to earn the CCNP Enterprise certification. Learn advanced routing, network security, network automation, and virtualization technologies like VRF and GRE tunneling to manage complex networks. This training covers key exam topics such as Cisco SD-WAN, SD-Access, QoS configuration, and Cisco DNA Center workflows. You'll leverage virtual labs and a 350-401 ENCOR practice exam to gain hands-on experience configuring Cisco hardware and software. You'll also build essential skills in troubleshooting, Multicast tree architectures, and infrastructure security. This ENCOR training is ideal for network administrators and IT teams, and equips you with the advanced skills you need to thrive in enterprise environments.
Cisco
CCNP Security
This CCNP Security training is designed to help you get comfortable with the 300-710 SNCF exam objectives, and earn your CCNP Security certification. Taught by networking expert Keith Barker and cybersecurity professional Bob Salmans, this course focuses on securing networks with Cisco Firewalls, including Firepower Threat Defense and Management Center. This training is ideal for Network Security Engineers and System Administrators seeking rigorous 300-710 SNCF exam prep, as well as IT managers looking for a streamlined onboarding tool or a high-level Cisco training resource for their technical teams.
Cisco
CCNP Service Provider
This intermediate Cisco CCNP Service Provider training prepares network engineers for the 350-501 SPCOR exam, the core requirement for the CCNP Service Provider certification. The training covers the full scope of service provider network engineering, including core architecture, networking, segment routing, QoS, and automation. Gain hands-on expertise with technologies such as Segment Routing for IPv6 (SRv6), Routed Optical Networks, App-Hosting on IOS XR and IOS XE, BGP PIC and Additional Paths, Segment Routing Flexible Algorithm, and Secure Zero-Touch Provisioning (ZTP). This Cisco training is designed to help you build and maintain scalable, secure, and resilient service provider networks.
Cisco
Cisco CCNA
This Cisco CCNA training fully prepares you for the 200-301 v1.1 exam — and to earn your Cisco Certified Network Associate certification. Master core network fundamentals, IP connectivity, VLAN configuration, routing protocols (OSPF, static), LAN switching, NAT, DHCP, and VPN services. Explore network automation, cloud networking, and leveraging artificial intelligence in networking. You'll also gain access to unlimited CCNA practice exams and virtual labs that simulate enterprise-scale network scenarios with routers, switches, VLANs, and wireless controllers. These realistic practice tests and hands-on lab environments help you build confidence and practical skills before exam day. Start your CCNA certification journey here.
Cisco
Cisco CCNA 200-301 v2.0
For IT leaders who need a consistent networking baseline across the team: this associate-level Cisco CCNA 200-301 training gives staff the structure to resolve first-line issues without constant escalation. It covers foundational topics including network models, topologies, cabling, IPv4 subnetting/VLSM, IPv6, and wireless. Staff come away able to configure and troubleshoot Cisco IOS CLI, VLANs, 802.1Q trunks, inter-VLAN routing, single-area OSPFv2/OSPFv3, CDP/LLDP, security fundamentals, and AI-assisted networking. Hands-on labs lock in these skills so staff can configure core infrastructure, isolate faults, and troubleshoot wireless clients and OSPF adjacencies. Playlists, Virtual Labs, Practice Exams, and Team Reporting help training managers structure learning paths, provide safe hands-on practice, validate readiness before the 200-301 exam, and track progress.
Cisco
Cisco CCNP Security Core 350-701 SCOR
Security teams often inherit fragmented controls across firewalls, VPNs, endpoints, cloud services, and identity systems. That fragmentation slows incident response and raises change risk. This intermediate, 32.3-hour course gives IT Directors one structured path that maps those controls to the Cisco CCNP Security Core (350-701 SCOR) v2.0 exam. It is built for network administrators, security engineers, and IT practitioners who already know networking fundamentals. They work through threat concepts, cryptography, IPSec and remote access VPNs, Layer 2 hardening, Cisco FTD, cloud shared responsibility, Splunk basics, endpoint and email threat defense, Cisco ISE, exfiltration, visibility, and zero trust. Many lessons include configuration and verification. Learners build an FTD lab, apply decryption, IPS, malware, and URL filtering policies, and use ISE policy sets with 802.1X, MAB, and CoA to move authenticated users into the right VLAN. Your team can rehearse changes in a lab before they reach production. Training Managers can assign the course through CBT Nuggets Playlists and track progress with Team Reporting. That supports a consistent certification push or a security operations handoff.
Cisco
Cisco DNA Center
This intermediate-level Cisco DNA Center course covers implementing an SD-Access fabric, automating business intent, or getting full insight into your environment with Assurance. It will start from Day 0 with planning and best practices, basic setup of the DNA Center appliance, all the way to implementing a full SD-Access Overlay fabric.
Cisco
ENARSI
This ENARSI 300-410 v1.1 training focuses on implementing advanced enterprise routing technologies and services, while preparing you for the CCNP Enterprise concentration exam with unlimited practice exams and virtual labs. It’s for people who want to deepen their understanding of Layer 3 routing, VPN services, infrastructure security, and core network services used in real enterprise environments. The course covers how to deploy and operate technologies like OSPF, EIGRP, BGP, MPLS, and DMVPN, along with the policies and controls that keep large networks stable and secure. Troubleshooting plays a larger role in ENARSI v1.1, so this updated course emphasizes how to diagnose routing and service issues using telemetry, NetFlow, and Cisco Catalyst Center Assurance.
CompTIA
CompTIA A+ Core 1
Build a foundation in IT with this expert-led CompTIA A+ Core 1 (220-1201) training. This course includes an A+ Core 1 practice test, study guide, and virtual labs to make sure you're confident on exam day. You’ll learn how to troubleshoot PCs, configure mobile devices, support networking and cloud technologies, and work with virtualization. Through real-world scenarios, interactive modules, and targeted practice questions, you’ll build experience you can apply right away in roles like Help Desk Technician or IT Support Specialist.
CompTIA
CompTIA Network+
This entry-level CompTIA Network+ (N10-009) training builds working networking skills with hands-on virtual labs. It covers the OSI model and TCP/IP, subnetting, configuring routers, switches, and firewalls, troubleshooting common connectivity and performance issues, basic network security, managing Intermediate Distribution Frame (IDF) and Main Distribution Frame (MDF) wiring, and zero-trust architecture concepts. Network+ validates fundamental networking knowledge without tying your team to a single vendor's equipment. For an IT Director building a help desk or junior network team, Network+ is the standard first credential: it confirms that new administrators can configure and troubleshoot a network before they touch production. New IT professionals and career changers earn the same certification on the same path.
CompTIA
Security+
This CompTIA Security+ (SY0-701) training prepares your team for a widely recognized entry-level cybersecurity certification. It covers network security fundamentals, cryptography basics, threat detection and mitigation, risk management, and compliance frameworks, and it builds the skills the SY0-701 exam tests: assessing the security posture of an enterprise environment and recommending solutions, monitoring and securing hybrid cloud and on-premises environments, responding to security incidents, and working within applicable regulations and governance policies. For an IT Director in a regulated industry, Security+ is the baseline many hiring rubrics and compliance programs expect of help desk analysts, network administrators, and security specialists alike. Individuals starting a security specialty earn the same credential on the same path.
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Cybersecurity
Cybersecurity Awareness Online Training
This online Cybersecurity Awareness training teaches end users in your organization the skills needed to improve security and prevent cyber attack on your organization. Even tech-savvy employees can benefit from a refresher on how to protect yourself and your company online. This security awareness course will help keep you, your devices, your network and your entire company safe while you use the internet, read your emails and use applications.
Cybersecurity
White Hat Hacking
This White Hat Hacking v10 training covers how to lawfully identify weaknesses and vulnerabilities of a system, and improve your network's security posture. With this security training, you'll learn how to scan networks for vulnerabilities, use Kali Linux to (legally) hack into systems, and write reports on how you did it. Use this course for penetration and vulnerability exam prep, skills development for security professionals, or to create training plans for your team.
Fortinet
FortiManager Admin
Learn the ins and outs of FortiManager, gain control of your SOC, and prepare to earn your Fortinet Certified Professional - Network Security certification. This Fortinet training course prepares SOC analysts and network security administrators to manage FortiGate devices at scale. You’ll dive into centralized policy management, device provisioning, and troubleshooting — plus learn to streamline your entire network's security operations. This Fortinet course maps to the Fortinet NSE 5 - FortiManager 7.6 Administrator exam, meaning you’ll learn the network security skills to get certified and become more confident on the job.
Fortinet
Fortinet Firewall 7.6 Admin
Learn to deploy, configure, and optimize Fortinet enterprise firewalls at scale. This advanced course builds the enterprise-ready skills you need to run a Fortinet security fabric confidently. You’ll practice configuring HA clusters, deploying OSPF and BGP, building VPNs, and using FortiManager and FortiAnalyzer for central management. These are the exact skills Fortinet expects from a Certified Solution Specialist (FCSS), preparing you to secure, optimize, and manage complex enterprise environments with authority.
Fortinet
Fortinet FortiAnalyzer
This Fortinet training teaches you how to use FortiAnalyzer 7.4 to strengthen your security operations, and pass the Fortinet NSE 5 - FortiAnalyzer 7.6 Analyst exam. You’ll practice configuring ADOMs, collecting and searching logs, and building custom reports. You’ll also tune event handlers, manage incidents and create playbooks that automate your response workflows. Whether you’re a SOC analyst or network engineer, this course aligns with one of two exams you need to pass in order to earn the Fortinet Certified Professional (FCP) in Security Operations certification, or the Fortinet Certified Professional (FCP) in Network Security certification, so you can run a smarter Security Fabric.
Fortinet
Fortinet NSE 6
This Fortinet NSE 6 Secure Wireless LAN training covers Fortinet's many network security tools and helps you pass the NSE 6 exam, which focuses on using the FortiGate as a wireless LAN controller.
Fortinet
Fortinet NSE 6
This course prepares you for the Fortinet NSE 6 - Network Security 7.6 Support Engineer exam. In this Fortinet training, networking expert Keith Barker demonstrates how to diagnose and resolve real issues in enterprise FortiGate environments, including Security Fabric communication and HA cluster behavior, authentication, security profiles, routing, and VPNs. You'll practice complete diagnostic workflows, from debugging OSPF and BGP, to analyzing traffic and logs, monitoring performance, and tracing problems end to end. By passing the Fortinet NSE 6 exam, you’ll fulfill one of the concentration requirements to earn your Fortinet Certified Solution Specialist (FCSS) - Secure Networking certification.
Fortinet
Fortinet NSE 6 - FortiAuthenticator Online Training
This intermediate FortiAuthenticator training prepares security professionals to take the NSE 6 - FortiAuthenticator exam, which is one of four exams required to earn the NSE 6 Network Security Specialist certification.
Fortinet
Fortinet NSE 6 - FortiSwitch Online Training
This intermediate Fortinet FortiSwitch training prepares security professionals to take the Fortinet NSE 6 - FortiSwitch exam, which is one of four exams required to earn the Network Security Specialist certification.
Fortinet
Fortinet NSE 6 FortiADC
This intermediate FortiADC training prepares security professionals to take the FortiADC exam, which is one four of the exams required to earn the NS6 Network Security Specialist certification. Learn how to configure and maintain the application delivery controller (ADC) from Fortinet to ensure the availability, security and optimization of your network's distributed applications.
Fortinet
Fortinet NSE 7
This intermediate Fortinet NSE 7 - SD-WAN training prepares network security admins to configure and manage some of Fortinet's most advanced security features for their family of SD-WAN network solutions. In addition to specific, applicable administration and configuration skills, this Fortinet SD-WAN course will prepare you for one of the concentration exams needed to earn the NSE 7.
Fortinet
FortiOS Administrator
This FortiOS 7.6 Administrator exam training prepares network administrators and security engineers for managing Fortinet firewalls. Configure dynamic routing, set up failover and ECMP routes, and manage DHCP services on FortiGate devices. Take this training and you’ll build the skills needed to secure and optimize enterprise networks using Fortinet’s powerful security infrastructure — plus, towards earning your Fortinet Certified Professional (FCP) - Secure Networking certification.
Networking
BGP
This Border Gateway Protocol course for Cisco and Juniper environments covers how to configure iBGP and eBGP, manage neighbor relationships, and implement traffic engineering using local preference and AS path prepending. You'll learn about network scalability through route reflectors and confederations, while gaining hands-on practice with BGP troubleshooting and route filtering. Whether you're handling multi-carrier redundancy or SD-WAN, this course will help you learn the real-world networking skills needed to maintain stable enterprise networks.
Networking
Wireless Design Professional Training
This Wireless Design Professional training covers how to manage every step of a WLAN deployment, from early planning steps to implementation and optimization. This WLAN skills course covers all the skills necessary for planning a wireless network, up to and including an enterprise-scale network.
Networking
Wireless Network Administrator
This Wireless Network Administrator training teaches you how to deploy, manage, monitor, and troubleshoot 802.11 wireless networks. You’ll gain a comprehensive understanding of WLAN devices and operations while focusing on vendor-neutral 802.11 technologies instead of specific brands or manufacturers. For IT managers, this networking training can be used to onboard new network admins, curated into individual or team training plans, or as a networking reference resource.
Palo Alto
Palo Alto Network Security
Strengthen your security posture with this Palo Alto Network Security Engineer training. Learn how to support Palo Alto’s network security ecosystem with deployment, policy management, decryption, and remote user security. This course helps you learn practical skills with hardware and cloud tools including local Firewall management, as well as cloud management via tools like Strata Cloud Manager (SCM), helping you stand out as a network security specialist. This course also maps to the Next-Gen Firewall domains of the Palo Alto Network Security Professional certification, making it a great resource for PCNSP exam prep. For a deeper dive into NGFW configurations, Panorama, IPv6, and Zero Touch Provisioning, pair it with the Palo Alto Networks Certified Network Security Engineer (PCNSE) course.
Palo Alto
PCCET
This Palo Alto Networks Certified Cybersecurity Entry-level Technician (PCCET) training follows the PCCET objectives, which Palo Alto Networks retired on 31 January 2025. The material is comprehensive and thorough, and it is written for people new to cybersecurity. No matter the reason why, if you need to understand how devices, networks, and clouds are kept digitally secure, this training is a good first step.
Palo Alto
PCNSA
This Palo Alto Networks Certified Network Security Administrator (PCNSA) training covers how to manage Palo Alto’s security platform and architecture to understand security best practices. The course focuses on installing, maintaining, and managing Palo Alto Networks' next-generation firewalls to protect networks. An extensive background in digital security is not a prerequisite. Palo Alto Networks retired the PCNSA exam on 31 January 2025, so the course is assigned today for the firewall administration skills themselves.
Palo Alto
PCNSE
This Palo Alto firewall training follows the PCNSE objectives, which Palo Alto Networks retired on 31 July 2025. Designed for experienced security professionals, it teaches how to configure and manage Palo Alto Networks firewalls, troubleshoot complex security issues, and secure enterprise environments. Build real-world skills in designing, deploying, and maintaining Palo Alto solutions across real-world networks.
Project Management
IT Service Management
Learn essential service management skills with this entry-level ITSM training by Keith Barker. Understand service management concepts, the service value system, governance, and continual improvement. Perfect for onboarding project managers, team training, or as a reference resource. Enhance your IT and business strategy skills with this comprehensive service management course.
VMware
(VCP-DCV 2024)
This VMware Certified Professional - Data Center Virtualization 2024 (VCP-DCV 2024) vSphere 8 training covers how to manage, deploy, & troubleshoot vSphere 8 environments for virtual machines. VMware makes some of the world's most popular virtualization technology, and if you want a career maintaining and operating it, or architecting networks that rely on it, you should plan on earning one of their certifications.
VMware
VCP-NV 2025
This VMware Certified Professional – Network Virtualization 2025 (VCP-NV 2025) training covers how to configure, deploy, and manage VMware NSX environments. Master VMware network virtualization and you open doors to jobs that will have you revolutionizing network infrastructure and enhancing operational efficiency. Businesses are increasingly relying on virtualization, and VMware is reliably at the heart of most of those ventures.
VMware
VMware VCP-VVF Administrator (2V0-16.25)
Virtualization platforms carry an organization's most critical workloads, so inconsistent vSphere administration shows up as permission sprawl, slow provisioning, and avoidable outages. This course gives IT Directors a structured way to standardize how their team deploys and operates VMware vSphere Foundation while preparing staff for the VCP-VVF Administrator (2V0-16.25) exam. Built for systems, virtualization, and data center teams, the 16.4-hour intermediate curriculum covers deploying ESXi hosts and vCenter Server, building datacenters and clusters, configuring host and VM networking, and connecting NFS, VMFS over iSCSI, and vSAN storage. Your team also works through vMotion, DRS, and HA; certificates, licensing, and lifecycle management; VM creation, cloning, templates, and encryption; least-privilege RBAC with external authentication; and VCF Operations, Supervisor, and orchestration workflows. Training Managers can assign the course in phases by skill area, such as platform buildout, storage and networking, availability, identity and security, and operations, to limit disruption while procedures get standardized. Playlists sequence the rollout, Practice Exams support certification readiness, Virtual Labs give a safe place to practice, and Team Reporting shows leaders completion and readiness across the team.
VMware
VMware VCP-VVF Support (2V0-18.25)
Virtualization incidents rarely stay in one layer. A failed upgrade, an unreachable datastore, or a licensing error can span compute, storage, networking, and operations tooling, and teams that troubleshoot in silos take longer to restore service. This intermediate course gives IT Directors a shared VVF 9 support baseline across the team. Built for virtualization administrators and support engineers who already work with ESX, vCenter, and vSAN, the course walks through V8-to-VVF 9 upgrades, VCF Installer behavior, NFS, iSCSI, and vSAN deployment, cluster management, licensing, compute, and networking troubleshooting. Practitioners learn to validate storage paths early with tools like `vmkping`, activate VCF Ops logging (not deployed by default in VVF), and use the VCF Ops Orchestrator to schedule workflows and inspect failed tasks. At about 9.9 hours per learner, it fits a focused enablement sprint ahead of a platform upgrade or a 2V0-18.25 certification push. Training Managers can use Team Reporting and Playlists to assign the troubleshooting sequence and track completion.
Wireshark
Wireshark (WCA) Certification
Master the core skills of packet analysis that set you apart as a Wireshark Certified Analyst. This Wireshark training shows you how to use the world’s most popular packet capture tool to inspect traffic in motion, identify key protocol headers, and pinpoint issues with dynamic filters. Study with virtual labs built by IT pros, and build the hands-on experience you need to pass the WCA-101 exam. Earn your Wireshark Certified Analyst credential as you capture real traffic and troubleshoot Ethernet, IP, TCP, and application-layer problems.
Buyer proof
How Comcast Saved Hundreds per seat with an Efficient, Scalable Training Program by CBT Nuggets
Enterprise Tech / Telcom · Florida, U.S. · 29
Comcast’s Sales Engineering division has a highly technical job, and needed a training solution that could keep up. CBT Nuggets helped them reduce their per-SE training cost by hundreds per seat, and is now the training standard across 10 out of 13 Comcast SE regions.
Read the full case study“CBT Nuggets is interesting because they can give you these little certificates that say, hey, you completed this content and got certified. As a policy, we accept that.”
Chris Layfield
Director of Engineering at Comcast Business