Kr Computer & Services

01/01/2026

11/12/2025

IPv4 Address Classes!

An IP Address is like the identity card of every device on a network . In IPv4, addresses are divided into 5 classes:

🔹 Class A: 0.0.0.0 – 127.255.255.255
🔹 Class B: 128.0.0.0 – 191.255.255.255
🔹 Class C: 192.0.0.0 – 223.255.255.255
🔹 Class D: 224.0.0.0 – 239.255.255.255 (Multicasting)
🔹 Class E: 240.0.0.0 – 255.255.255.255 (Research & Experimental)

Special Reservations:

■ 0.0.0.0 → Default routing
■ 127.0.0.0 → Loopback testing
■ Class D → Multicasting
■ Class E → Research

Private IP Ranges (used in LAN):

■ Class A: 10.0.0.0 – 10.255.255.255
■ Class B: 172.16.0.0 – 172.31.255.255
■ Class C: 192.168.0.0 – 192.168.255.255

Public IP Ranges (used on the Internet):

Class A, B, C (excluding private ranges)

In simple terms:

Private IP = Used inside your home/office network.
Public IP = Used on the internet

23/11/2025

Welcome to OnlyLANs, where every curve, tie, and perfectly labeled cable gets the spotlight it deserves.

19/11/2025

CCTV System Overview!
A quick look at how cameras, DVR, power supply, and your devices all connect to keep your place secure. 📡

06/11/2025

Camera Types 📸📷👀
Know about Cameras👍🏻

01/11/2025

📸 Complete CP Plus 2MP IP CCTV Camera Setup – Full Security Package for Home, Shop, Office & Warehouse!

🎯 Setup Includes:
✅ 2 Outdoor IP Cameras – 2MP Color with Mic
✅ 6 Indoor IP Cameras – 2MP Color with Mic
✅ CP Plus 8-Channel NVR
✅ 2TB Hard Disk
✅ 8+2 Port PoE Switch
✅ 100 Meter Pure Copper Wire
✅ Connectors + PVC Box
🛡️ 2 Years Warranty on All Products

🔧 Professional Installation Available in ALL ODISHA
💸 Installation Charges: ₹500 per camera only

Why Choose Us?
📦 Fast Delivery
🛡️ Branded & Trusted Products
💯 Professional Support and Setup

📞 Call Now to Book: 8658920954
📍KR COMPUTER AND SERVICES | Your Local CCTV Expert

1. Complete CP Plus 2MP CCTV Setup | 8 Cameras + NVR + Installation | Best Security System 2025
2. 8 Camera CP Plus IP CCTV Setup | Color + Audio | CUTTACK Installation by KRCS
3. CCTV for Home & Shop | CP Plus 2MP Full Setup with Audio | KR COMPUTER AND SERVICES
4. CP Plus 8 Camera Color CCTV Setup | Mic, NVR, Wire, PoE | Call 8658920954
5. Best CCTV Setup for Home & Office | CP Plus 2MP Cameras with Mic | CUTTACK Install

31/10/2025

Network devices & use !

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🚦 1. Router – The traffic cop of the internet. It connects different networks and directs data where it needs to go.

🔀 2. Switch – Connects multiple devices within a LAN and manages traffic efficiently.

🧩 3. Hub – A simple connector for Ethernet devices, but it doesn’t filter data like a switch.

🌉 4. Bridge – Connects two or more LANs and filters traffic using MAC addresses to reduce congestion.

🌍 5. Gateway – Acts as a translator between different network protocols, ensuring smooth communication.

🌐 6. Modem – Converts digital signals to analog (and back) for internet connectivity.

💻 7. NIC (Network Interface Card) – The hardware that lets a device connect to a network.

🧱 8. Firewall – Your first line of defense! It monitors and controls network traffic for security.

📡 9. Wireless Access Point (WAP) – Extends your network wirelessly so Wi-Fi devices can connect easily.

⚖️ 10. Load Balancer – Distributes traffic across multiple servers to prevent overload.

🕵️ 11. Proxy Server – Adds anonymity and filters content as it handles requests between clients and servers.

🔎 12. IDS (Intrusion Detection System) – Detects suspicious activity and alerts administrators.

🛡️ 13. IPS (Intrusion Prevention System) – Goes a step further — it blocks and prevents threats automatically.

💾 14. NAS (Network Attached Storage) – Shared file storage for teams and collaborations.

🚀 15. SAN (Storage Area Network) – A high-speed network connecting storage devices for centralized management.

29/10/2025

Small Office Network Setup