Matthew Dikko

Certified Network Engineer | Passionate about routing, switching and network security

[BowTiedCyber | Evan Lutz @BowTiedCyber]

Subnetting is easy.

Just use the table.

[Elorm Daniel @elormkdaniel]

6 jobs you fill as a CCNA

[Abdulkadir | Cybersecurity @cyber_razz]

ROUTING VS SWITCHING

[IPCisco @ip_cisco]

Which One Is Your Favourite ??
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Please Like & Retweet..:)
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#ccna #network

[Dhanian 🗯️ @e_opore]

Horizontal vs Vertical Scaling in System Design.

➤ Vertical Scaling (Scaling Up)

→ Definition: Increasing the capacity of a single server by upgrading its hardware
→ How it works: Add more CPU cores, Increase RAM, Use faster storage
→ Pros: Simple to implement, Works well for smaller systems or monolithic apps
→ Cons: Hardware limits, Single point of failure, Expensive at scale

➤ Horizontal Scaling (Scaling Out)

→ Definition: Adding more servers to handle load by distributing traffic
→ How it works: Deploy multiple servers, Use load balancers, Replicate or shard databases
→ Pros: Better fault tolerance, Practically unlimited scalability, Cost-effective with commodity hardware
→ Cons: Higher complexity, Data consistency challenges, Requires sophisticated infrastructure

➤ Key Differences

→ Approach: Vertical = upgrade single machine | Horizontal = add more machines
→ Complexity: Vertical = low | Horizontal = high
→ Scalability: Vertical = limited | Horizontal = virtually unlimited
→ Fault Tolerance: Vertical = single point of failure | Horizontal = high availability
→ Cost: Vertical = expensive at high-end | Horizontal = cost-effective
→ Use Case: Vertical = small apps or monoliths | Horizontal = large-scale, cloud-native systems

➤ Real-World Example

→ Instagram initially relied on vertical scaling: they upgraded single servers with more memory and faster CPUs to handle growing traffic.
→ As user growth exploded, vertical scaling reached its limits.
→ They shifted to horizontal scaling: distributing traffic across many servers, using load balancers, caching layers (like Redis), and sharding their database.
→ This allowed them to support hundreds of millions of users worldwide without downtime.

📘 System Design Handbook
A practical guide that breaks down modern system design concepts with clear explanations, diagrams, and best practices. It covers scalability, caching, databases, microservices, and real-world architectural patterns for building reliable and scalable systems.

Get it here → https://t.co/aE1KNO717x

[Elorm Daniel @elormkdaniel]

Understanding IPv4 Address Classes just got easier

Here's a clean visual breakdown of Class A, B, C, and Loopback with subnet masks and ranges.

Perfect for networking students and IT pros

[Matthew Dikko @DikkoTech]

Whether you're gaming, streaming, or building a next-gen workstation, the right cable makes the difference between lag and lightning.

[Matthew Dikko @DikkoTech]

Not all cables are created equal, from the old-school Cat 5 (100 Mbps) to the beast Cat 8 (25-40 Gbps at 2000 MHz) your connection speed is only as strong as the cable you're running.

#dikkotech #cable #viral #Networking #speed #AppleEvent

[Elorm Daniel @elormkdaniel]

Subnet Mask and Wild Card Mask

[Elorm Daniel @elormkdaniel]

Which Vendor Firewall do you use in your Infra??

[Elorm Daniel @elormkdaniel]

CCNA Exam Cheat Sheet

[Sahn Lam @sahnlam]

How does HTTPS work?

[Matthew Dikko @DikkoTech]

In short:
UEFI = Modern bootloader that’s secure, flexible, and future-ready. Legacy BIOS = Retired.

What’s your experience with UEFI vs BIOS?

#network #ccna #dikkotech #tech #bios #uefi #viral #windows #linux #Networking #programmer #VPN

[Matthew Dikko @DikkoTech]

Before UEFI, PCs relied on the legacy BIOS a system dating back to the 1980s. But as hardware advanced, BIOS couldn’t keep up. Enter UEFI (Unified Extensible Firmware Interface), the modern replacement.

[Matthew Dikko @DikkoTech]

Today, UEFI isn’t just for Windows PCs. It powers servers, macOS devices, and even embedded systems. From gamers to enterprises, it’s the backbone of reliable, fast, and secure computing.

[IPCisco @ip_cisco]

This Is Networking!! | IPCisco
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CCNA Course: https://t.co/nSyhDqwn4l
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Please Retweet..:)
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#ccna #network #cisco

[IPCisco @ip_cisco]

Patch Panel & Patch Cable!!!✨✨
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Please Like & Retweet..:)
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#ccna #cisco #network

[IPCisco @ip_cisco]

Cisco Catalyst Switch 2960!!!
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Network Devices: https://t.co/KfHohPk16G
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Please Like & Retweet..:)
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#ccna #cisco #network