Networking has become the backbone of today’s digital world. For engineers, mastering core networking skills for engineers is no longer optional but essential. From routing protocols like BGP and OSPF to modern tools like network automation and Python, these skills ensure faster, more reliable, and scalable networks.

Why Core Networking Skills Matter

Every business today depends on networks. Engineers with the right networking skills can manage performance, security, and automation. Companies like Cisco highlight how skills in BGP, OSPF, and automation are vital for future-ready infrastructure.

👉 Read also: What is FTTH? (internal link)

BGP (Border Gateway Protocol)

BGP is one of the most important core networking skills for engineers. It is the protocol that powers the global internet, deciding how data travels between networks. Engineers must know how to configure BGP, manage route policies, and troubleshoot connectivity.

• Used in ISPs and enterprise WANs.

• Helps with redundancy and scalability.

• Essential for engineers aiming at CCNP/CCIE certifications.

OSPF (Open Shortest Path First)

Another crucial skill is OSPF. Unlike BGP, it works inside a single organization (IGP). Learning OSPF ensures engineers can design resilient internal networks.

• Link-state protocol with fast convergence.

• Supports hierarchical design.

• A foundation for any enterprise or data center.

Network Automation

With networks growing in size, manual configuration is inefficient. Network automation is now a must-have skill for engineers.

• Reduces human error.

• Speeds up deployment.

• Tools like Ansible, Puppet, and Cisco DNA Center are widely used.

Python for Networking

Python has become the most popular programming language for network automation. Engineers who can script in Python have a big advantage.

• Automate device configuration.

• Create monitoring scripts.

• Integrate with APIs (REST, NETCONF).

Future of Networking Skills

The demand for core networking skills for engineers is growing. Engineers who master BGP, OSPF, automation, and Python will lead in cloud networking, 5G, and AI-driven infrastructure.

Conclusion

If you want to stand out as a networking professional, focus on BGP, OSPF, automation, and Python. These core networking skills for engineers ensure you stay relevant in 2025 and beyond.

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When you open a website or send a message, your device uses the Internet Protocol (IP) to identify itself and communicate with other systems. IPv4 vs IPv6 refers to two different versions of this protocol. IPv4 has powered the internet for more than three decades. However, the world is now moving toward IPv6. In this article, you will learn what IPv4 and IPv6 are, how they are different, and why this change matters.

IPv4 vs IPv6 – Understanding the Basics

IPv4 stands for Internet Protocol Version 4 and is the older version of the protocol.
It uses a 32-bit address, which is usually written in a dotted-decimal format such as 192.168.1.1. Because of this structure, IPv4 can only provide 4.3 billion addresses.

This sounded like a lot in the early years of the internet. However, with the rapid growth of smartphones, computers, smart home devices, and IoT systems, all IPv4 addresses have almost been used up.

IPv6, on the other hand, uses a 128-bit address and is written in a hexadecimal format with colons. For example: 2001:0db8:85a3:0000:0000:8a2e:0370:7334.
Due to its structure, IPv6 offers 340 undecillion unique addresses, which is more than enough for many generations to come.

Key Differences Between IPv4 vs IPv6

Why IPv4 vs IPv6 Difference Matters

First of all, IPv6 solves the address shortage problem completely. With IPv6, we can give a unique IP address to every device on earth.

Furthermore, IPv6 improves performance and reduces the need for complex workarounds like NAT (Network Address Translation).
Because IPv6 allows direct device-to-device communication, services such as video calls and online gaming work more smoothly.

In addition, IPv6 offers better security because IPsec is built-in. IPv4 can also support IPsec, but it is optional and therefore rarely used in basic environments.

What is NAT and Why It Was Used Before IPv6

Network Address Translation (NAT) is a method that allows multiple devices in a private network to share one public IPv4 address. This helped slow down the exhaustion of IPv4 addresses and allowed millions of home networks to stay online.

However, NAT adds complexity and sometimes reduces performance. Because IPv6 gives every device its own public IP address, this workaround is no longer necessary.

🔗 Related article on nowtech.in:
What is FTTH? Explained for Beginners (internal link)

🌐 Learn more about IPv6 on the official IETF website:
https://www.ietf.org/standards/ (outbound link)

Conclusion: IPv4 vs IPv6 – Which One Is Better?

To conclude, IPv4 vs IPv6 is not just a comparison. It shows how the internet is evolving to support billions of devices and improve security at the same time. IPv4 still works and will remain in use for many years. Nevertheless, IPv6 is the only protocol that can support the future growth of the internet.

If you are building networks or managing systems, adopting IPv6 is a smart and future-ready step.
For everyday users, the switch happens in the background, although it still brings faster and more secure connections.

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Routing in networking is the process of selecting the best path for data to travel across interconnected networks. When a device sends packets from one point to another, it does not automatically know where to go. Instead, routing helps the packets reach their final destination by choosing the shortest and most efficient path.

How Does Routing Work?

Whenever a packet leaves your device, it first reaches the nearest router. Next, the router checks the packet’s IP address and searches its routing table. This table contains information about known networks and the next hop for each destination.

Then, the router forwards the packet using the most efficient route. Furthermore, if the packet needs to cross several routers, each router repeats this process until the packet finally reaches its destination network.

This entire task takes place in milliseconds. As a result, websites and online services load quickly and without interruption.

Routing Methods

There are two primary methods used in networking:

Popular Dynamic Routing Protocols

Modern routers use different protocols depending on the network size:

• RIP (Routing Information Protocol) – A simple, distance-vector protocol used in smaller environments.

• OSPF (Open Shortest Path First) – A link-state protocol often seen in large enterprise networks.

• EIGRP (Enhanced Interior Gateway Routing Protocol) – Cisco’s proprietary hybrid protocol.

• BGP (Border Gateway Protocol) – Used between Internet Service Providers (ISPs); it is the backbone of the internet.
  For a deeper look at BGP, you can read: https://www.cloudflare.com/learning/network-layer/what-is-bgp/

Importance of Routing in Modern Networks

Routing plays a vital role in networking infrastructure. In fact, it ensures that packets reach their destination quickly and reliably. Here are a few important benefits:

• Ensures reliable delivery of data

• Improves network performance due to optimized paths

• Supports real-time services, such as VoIP and video streaming

• Promotes scalability and smooth network expansion

• Prevents congestion by automatically choosing alternate paths

Without proper routing, packets could get dropped or travel through inefficient routes, which would lead to slow performance and packet loss.

Routing vs Switching – What’s the Difference?

In short, switches forward traffic inside a single network, while routers direct traffic between multiple networks.

Types of Routes

Here are the most common types of routes you’ll find in modern networks:

• Directly Connected Route – The destination exists on one of the router’s interfaces.

• Static Route – An administrator manually configures this route.

• Default Route – Used when no specific route is available in the routing table.

• Dynamic Route – Learned automatically through routing protocols.

If you want to explore more details on route types and routing tables, you can visit:
https://www.practicalnetworking.net/series/routing/what-is-routing/

FAQ – Frequently Asked Questions

Q1. Is routing only used on the internet?
No. Routing is also used in private enterprise networks, data centers and cloud networks.

Q2. Can routing happen without a router?
No. Routing requires a routing-capable device such as a router, firewall or layer-3 switch.

Q3. What happens if a route is not found by the router?
In that case, the router either forwards the packet to a default gateway (if available) or drops it.

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Introduction to Submarine Cables

In simple words, submarine cables act like highways for the internet. They connect regions across the globe and carry voice, video, and data signals between major data centers. Because of this, people can browse websites, stream videos, and make VoIP calls with low delay across long distances.

How Does a Submarine Cable Work?

A submarine cable uses fiber-optic technology, which means it sends information in the form of light signals. As a result, data can travel extremely fast through glass fibers inside the cable.
The cable is protected by several layers such as steel, copper and waterproof insulation. These layers help the cable stay safe from water pressure and physical damage.

When a cable reaches the coast, it connects to a landing station and continues as a terrestrial fiber link to internet exchange points and service providers.
Therefore, submarine cables play an essential role in the smooth operation of global communication systems.

Types of Submarine Cables

Importance of Submarine Cables

Submarine cables provide many benefits to modern communication networks. Here are a few reasons why they are so important:

• Fast data transfer: Fiber-optic cables offer very high bandwidth and low latency.

• Reliable connectivity: They provide more stable connections compared to satellites.

• Global reach: These cables connect different countries around the world.

• Support cloud services: They help businesses access cloud applications quickly.

• Scalability: New cables can be installed to handle increasing data requirements.

Besides this, most telecom operators and internet service providers rely on submarine cables to deliver data to end users.

How Submarine Cables Are Installed

Installing a submarine cable usually follows a step-by-step process:

1. Planning and route survey – Engineers choose a safe and stable path on the seabed.

2. Manufacturing the cable – The cable is designed and built according to the required distance.

3. Laying the cable – Special ships carefully place the cable on the sea floor.

4. Testing and activation – The cable is tested for performance and then put into service.

In addition, cable routes are often monitored and maintained to avoid damage from fishing, anchors or underwater landslides.

Submarine Cable vs Satellite Communication

Therefore, submarine cables are preferred for high-speed internet and mission-critical data transmission.

Examples of Major Submarine Cable Systems

• SEA-ME-WE 6 – Connects Southeast Asia, the Middle East and Western Europe

• APG (Asia-Pacific Gateway) – Connects Asian countries such as India, Japan and Singapore

• Marea Cable – Connects the United States and Spain over the Atlantic Ocean

For a live map of all active cables, you can visit: https://www.submarinecablemap.com/

FAQ – Frequently Asked Questions

Q1. What is Submarine Cable used for?
It is used to transmit internet, voice and data traffic between countries across the ocean.

Q2. Is submarine cable safe from damage?
Yes, it has multiple protection layers and is laid in a way that avoids high-risk areas. However, ships and fishing nets can still cause damage.

Q3. Who owns submarine cables?
Usually, submarine cables are owned by telecom operators or a group of companies working together.

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