Skip to main content

Posts

Network System and Security Part-1

  1. Plaintext (اصل Data / Original Message) Plaintext wo normal readable data hota hai jo kisi ne likha ho ya bhejna ho, bina kisi protection k. Example: Agar aap WhatsApp pe likho: "Hello Manan, Meet me at 5pm" – ye plaintext hai. Ye kisi bhi banda easily parh sakta hai. 2. Ciphertext (خفیہ Data / Hidden Message) Ciphertext wo data hota hai jo encrypt (lock) kia gaya hota hai taake koi doosra usay na parh sakay. Example: Agar "Hello Manan" ko encrypt karo to ban sakta hai: "Xlwwr Qfrfr" Ab ye ciphertext hai. Sirf jis k paas key hogi wo isay wapas original me badal sakta hai. 3. Encryption (Lock Karna / Data ko Secure Karna) Encryption ka matlab hota hai plaintext ko ciphertext me badalna – yani data ko lock kar dena. Example: Aapka message: "Meet me at 5pm" Encryption k baad: "Pfhy ph cv 5ro" Ab ye safe hai, koi beech me data churaye to bhi samajh nahi sakta. 4. Decryption (Unlock Karna / Data ko Wapas Readable Banana)...
Post a Comment
Read more
Recent posts

CPU Cores

  🔸 1. Pentium 1, 2, 3, 4 ·          🕰 ️ Old generation processors from Intel ·          ⚙️ Single core hote thay (sirf 1 kaam ek time pe achhe se karte) ·          🖥 ️ Used in: Windows 95/98/XP time ke computers ·          ❌ Slow processing speed, modern software ke liye weak 🔸 2. Dual Core ·          ⚙️ 2 cores (yaani 2 brain) — ek time pe 2 tasks handle kar sakta hai ·          🧠 Better multi-tasking than Pentium ·          🖥 ️ Used in: Early Windows 7 laptops/PCs ·          ✅ Decent for light use (browsing, MS Office, movies) 🔸 3. Core2Duo ·          💡 Intel ka improved ...
Post a Comment
Read more

Motherboard Connectors Diagram

  This is Related for  computer power supply (SMPS) 🔌 1. 20+4 Pin Connector 🧠 Use: Motherboard ko power dene ke liye 📍 Details: Yeh main connector hota hai jo motherboard me lagta hai. 20 pin old motherboards ke liye, aur extra 4 pin new boards ke liye hote hain. 🔌 2. PCI-E Connector 🎮 Use: Graphic card ko power dene ke liye 📍 Details: High power graphic cards (like NVIDIA/AMD) ko extra power chahiye hoti hai, jo yeh connector deta hai. 🔌 3. SATA Power Connector 💾 Use: SSD, HDD, DVD drive 📍 Details: SATA devices (jaise SSD, HDD, CD/DVD drive) ko power dene ke liye use hota hai. 🔌 4. Floppy Connector 📼 Use: Old floppy disk drives ke liye 📍 Details: Ab use nahi hota, sirf purane PCs me milta hai. 🔌 5. P4 MB Connector (4-pin CPU Power) 🧠 Use: Processor ko power dena 📍 Details: Yeh motherboard ke CPU socket ke paas lagta hai, processor ko extra power deta hai. 🔌 6. 4-Pin Molex Connector...
Post a Comment
Read more

Motherboard Information

  Motherboard Diagram 🔹 1. CPU Socket 🧠 Yahan processor (CPU) lagta hai. 👉 Har motherboard ka socket type alag hota hai (Intel ya AMD). 🔹 2. CPU Heat Sink Mounts 🌬 ️ Yahan fan ya heat sink lagta hai processor ke upar taake wo thanda rahe. 🔹 3. Power Connector (20+4 pin) ⚡ Power Supply yahan connect hoti hai motherboard ko power dene ke liye. 🔹 4. DRAM Memory Slots (RAM Slots) 💾 Yahan RAM lagti hai. Usually 2 ya 4 slots hote hain. 🔹 5. Hard Drive Slots (SATA connectors) 📦 Yahan HDD ya SSD connect hote hain data store karne ke liye. 🔹 6. ROM (BIOS/UEFI chip) 🧬 Yeh chip motherboard ki basic settings aur boot instructions store karti hai. 🔹 7. Northbridge Chip 📶 Fast communication karta hai CPU, RAM aur graphics ke beech. (Ab naye boards me directly CPU me hota hai) 🔹 8. Southbridge Chip 🔌 Control karta hai slow devices jaise USB, audio, LAN ports, etc. 🔹 9. PCI Slot...
Post a Comment
Read more

Active POE and Passive POE

  ✅ Best PoE Injector: Active PoE Injector hi best aur safe hota hai. Wajah neeche easy words me: 🔌 Active PoE vs Passive PoE – Simple Comparison: Feature 🔋 Active PoE (802.3af/at/bt) ⚡ Passive PoE Voltage Control Device se handshake karta hai No control – direct voltage Auto Power Match Device jitni power mange, utni deta hai Fixed voltage deta hai (24V/48V/52V) Safe for Devices ✅ Safe – overvoltage nahi deta ❌ Risky – device jal sakti hai Standard Follows 802.3af (15.4W), 802.3at (30W), bt (60–90W) No standard Compatibility Smart – har PoE device ke sath kaam karta hai Sirf passive PoE supported devices ke sath 🔧 Toh best kya hai? ➡️ Active PoE Injector hi best hai kyunki: Wo sirf usi device ko power deta hai jo PoE support karti ho Jitni power chahiye, utni hi deta hai Device ko damage hone se bachata hai
Post a Comment
Read more

What is a POP

  POP (Post Office Protocol) ek email protocol hai jo emails ko server se download karne aur local device (jaise computer ya phone) pe store karne ke liye use hota hai.   POP Ka Kaam Kaise Karta Hai?   1. Email Download: Jab aap apne email client (jaise Outlook, Thunderbird) par POP set up karte hain, to aapka email client server se emails ko download kar leta hai.    2. Server Se Deletion: Default POP setting mein, jab emails aapke device par download ho jate hain, to wo server se delete ho jate hain. Matlab server pe aapke emails nahi rehte, wo aapke local device pe store ho jate hain.   3. Single Device Access: POP ko use karte waqt aap sirf ek device se emails access kar sakte hain. Agar aap ne email apne computer pe download kar liya, to wo doosre device (jaise mobile) par available nahi hota.   POP Ki Example:   Maan lijiye aapne apne email account ko POP ke zariye apne computer pe configure kiya hai:   ...
Post a Comment
Read more

What is a IMAP

IMAP (Internet Message Access Protocol) ek protocol hai jo email messages ko server par store karta hai, aur aapko multiple devices se apne emails access karne ki suvidha deta hai. Iska fayda yeh hai ke saare devices (jaise mobile, laptop, etc.) par aapka email account sync rehta hai, aur aap kisi bhi device se apne emails ko manage kar sakte hain. IMAP Ka Kaam Kaise Karta Hai? Emails Server Par Stored Rehte Hain: Jab aap IMAP use karte hain, to aapke emails server par stored rehte hain. Matlab aapka phone, laptop ya kisi bhi device par jab aap email dekhenge, wo sab device pe sync ho jayenge. Multiple Devices Se Access: Aap apne email account ko multiple devices (mobile, laptop, tablet) pe setup kar sakte hain. Jab bhi aap kisi device pe email read, delete ya move karte hain, wo change baaki devices pe bhi show hota hai. Email Folders Ko Manage Karna: IMAP ke zariye aap apne emails ko folders mein organize kar sakte hain, jaise "Inbox," "Sent," "Dra...
Post a Comment
Read more