Information Technology 👨🏽💻 A+ | Security+
Seattle, WA
Joined April 2026
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Me: “I think I’m finally past the hardest CCNA topics.” 😮💨
CCNA: “Cool. Now let’s talk about wireless.” 💀📡
Just when you think you’re making progress, Cisco reminds you there’s ALWAYS another topic to humble you. 😂
Anyone else struggle with wireless? 👇 #CCNA #Networking #IT
🔥 Security+ SY0-701 Challenge
A SIEM detects failed logins, a successful login from an unfamiliar IP, and the creation of a privileged account.
IR policy requires validation before containment.
What should the analyst do NEXT?
A) Disable the account
B) Correlate authentication and account-creation logs
C) Block the source IP
D) Reset all employee passwords
👇 What’s your answer? Explain why!
#CompTIA #SecurityPlus #Cybersecurity
🔐 CCNA Challenge ACLs
You configure an ACL on a Cisco router to permit traffic from a specific subnet.
The traffic is still being blocked, even though no explicit deny statement exists.
What could explain this?
A) ACLs permit all traffic by default
B) The router needs to reboot
C) An implicit deny exists at the end of the ACL
D) ACLs only filter inbound traffic
Drop your answer! 👇
🔥 Tech debate: Is Linux REALLY superior to Windows, or is it just hype?
🐧 Linux: Customization, control, and powerful CLI tools.
🪟 Windows: Compatibility, convenience, and enterprise adoption.
Which OS wins, and WHY? 👇
I want to hear both sides! 💻
#Linux #Windows #TechTwitter
⚡ CCNA Challenge #4: Spanning Tree
What determines which switch becomes the root bridge in a traditional STP election?
A) Highest MAC address
B) Highest IP address
C) Lowest Bridge ID
D) Highest port number
Think you know the answer? Comment below! 👇
🚀 Certification check! What IT certification are you currently studying for?
💻 CCNA?
🔐 Security+?
☁️ AWS or Azure?
🛡️ CySA+?
Drop yours in the replies! Let’s see what the tech community is working toward and connect with others on the same journey! 👇
🚀 Just a few followers away from 500! Let’s connect! 🔥
Looking to grow my network in tech: Networking, Cloud, Cybersecurity, DevOps, and AI. 🤝
💻 What’s your tech niche, and what skill or cert are you working on? 👇
Let’s connect and grow together! 🌐
🐧 I’m looking to level up my Linux skills and get serious about learning Bash scripting.
For the sysadmins, cloud engineers, and cybersecurity professionals here:
🔥 What are the BEST resources to learn Linux and Bash hands-on?
Free courses, labs, YouTube channels, or practice platforms? Drop your recommendations! 👇
#Linux #Bash #CloudComputing
9/ 📈 What happens when the enterprise grows?
Imagine deploying hundreds of phones across multiple departments.
A consistent voice VLAN design helps network engineers standardize configurations, apply QoS policies, monitor voice traffic, and troubleshoot issues across switchports and sites.
The same principles scale from a small office to a large enterprise network.
10/ 💡 The takeaway
Learning voice VLANs for the CCNA is one thing.
Understanding how they support enterprise VoIP, QoS, segmentation, and troubleshooting is what connects certification knowledge to practical IT work.
I’m learning networking one concept at a time and connecting the theory to real-world enterprise environments.
Network engineers: What’s the most common voice VLAN issue you’ve encountered in production? 👇
8/ 🛠️ How does this help a help desk technician?
An employee reports that their computer has network connectivity, but their desk phone won’t register.
You now have a starting point for troubleshooting:
Verify the phone has power and a working link.
Check the switch port’s voice VLAN configuration.
Verify the phone learned the correct voice VLAN.
Check DHCP and the phone’s IP configuration.
Investigate routing, DNS, call-control connectivity, or firewall rules as appropriate.
Understanding VLANs helps you troubleshoot beyond simply restarting the phone.
6/ 🎧 Why does this matter for call quality?
Voice traffic is sensitive to latency, jitter, and packet loss.
Separating voice traffic into its own VLAN makes it easier to apply and troubleshoot:
• Quality of Service (QoS)
• Voice-specific network policies
• Traffic monitoring
• Troubleshooting procedures
A separate VLAN doesn’t automatically guarantee better call quality, but it provides a useful foundation for managing voice traffic.
7/ 🔐 There’s a security benefit, too.
Imagine a company wants to restrict communication between employee workstations and its voice infrastructure.
Separate VLANs create distinct Layer 2 broadcast domains.
With appropriate Layer 3 ACLs, firewall rules, and access policies, administrators can control which systems communicate across those networks.
Important: VLAN separation alone is NOT a complete security boundary.
2/ 📞 The real-world scenario
Imagine you’re supporting 850 employees in an enterprise environment.
An employee has:
• An IP phone
• A desktop connected through that phone
Both devices use the same physical switch port, but they don’t need to operate on the same VLAN.
That’s where voice VLANs come in.
5/ 🔍 How does the phone know which VLAN to use?
Cisco IP phones can learn their voice VLAN through CDP. LLDP-MED can also advertise voice VLAN information to compatible phones.
The phone then tags its voice traffic with the appropriate VLAN ID.
The connected computer typically sends untagged traffic, which the switch associates with the access VLAN.
4/ ⚙️ What does the configuration look like?
On a Cisco switch, you might configure an access port like this:
interface GigabitEthernet1/0/10
switchport mode access
switchport access vlan 10
switchport voice vlan 20
spanning-tree portfast
VLAN 10 = Employee data
VLAN 20 = VoIP phones
One physical port. Two VLANs. Different traffic.
3/ 🌐 How does it work?
A switch port can support two VLANs simultaneously:
🔹 Data VLAN — for the employee’s computer
🔹 Voice VLAN — for the IP phone
The phone connects to the switch, and the computer connects to the phone’s PC port.
The switch separates their traffic logically, even though they share a physical connection.
1/ 🧵 Voice VLANs aren’t just a CCNA exam topic. They’re used every day in enterprise networks to keep business phone systems organized, reliable, and separate from regular workstation traffic.
Here’s how they work in the real world. 👇
📚 Seriously considering going back to school for a degree in Cloud & Network Engineering.
I’m already building my IT foundation, but I’m thinking about taking the next step to invest in my future. ☁️
If you were in my shoes, would you go back to school or focus on certs and hands-on experience? Why?
Let’s hear your thoughts! 👇
#CloudComputing #Networking #ITCareer