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Sharan Babu recently completed the NPTEL “Computer Networks & Internet Protocol” certification from IIT Kharagpur, covering TCP/IP architecture, routing, congestion control, and network security. Below are key concepts and practical implementations related to the course.
You Should Know:
1. TCP/IP Architecture
- TCP/IP Model Layers:
- Application Layer (HTTP, FTP, DNS)
- Transport Layer (TCP, UDP)
- Internet Layer (IP, ICMP)
- Network Access Layer (Ethernet, Wi-Fi)
Commands:
- Check active TCP connections:
netstat -tuln
- Test connectivity (ICMP):
ping google.com
2. Routing Protocols
- Static vs. Dynamic Routing:
- Static: Manually configured routes (
ip route add). - Dynamic: Uses protocols like OSPF, BGP.
Linux Commands:
- View routing table:
route -n
- Trace route to a host:
traceroute example.com
3. Congestion Control
- TCP Congestion Algorithms:
- Tahoe, Reno, CUBIC.
- Monitor bandwidth:
iftop
4. Network Security
- Firewall Rules (iptables):
sudo iptables -A INPUT -p tcp --dport 22 -j ACCEPT
- Encrypted Traffic (SSH):
ssh user@remote-server
What Undercode Say:
Understanding network protocols is crucial for cybersecurity. Key takeaways:
– Always encrypt traffic (SSH, TLS).
– Monitor network activity (tcpdump, Wireshark).
– Harden systems with firewalls (ufw, iptables).
Expected Output: A secure, well-configured network with minimal latency and robust defenses against attacks.
Prediction: As networks evolve, AI-driven security (like anomaly detection) will dominate threat prevention.
(Relevant URL: NPTEL Computer Networks Course)
References:
Reported By: Sharan Babu – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
