Chapter 1
Internet Protocols, Emailing & Cyber Safety
Master IP, DNS, HTTPS, search operators, email etiquette, cloud storage, phishing detection, and UPI safety.
Internet, Web Services & Cyber Safety
The Internet is a global network of interconnected computers communicating via standardized protocols (TCP/IP).
Core Concepts:
- URL (Uniform Resource Locator): Complete web address:
https://satyameducation.org.in/computer/ - HTTP vs HTTPS: HTTPS uses SSL/TLS encryption (Port 443) to protect data from eavesdropping.
- DNS (Domain Name System): Translates human-friendly domain names into machine IP addresses.
- Email Protocols: SMTP (Simple Mail Transfer Protocol - Sending), POP3 / IMAP (Receiving).
- CC vs BCC: CC (Carbon Copy) shows all recipients. BCC (Blind Carbon Copy) conceals recipient addresses.
Hands-on Laboratory Procedures & Shortcuts
Follow the steps below to practice directly on your computer.
Cyber Security & Safe Browsing Practice:
- Verify SSL Padlock icon before entering passwords or payment card details.
- Enable Two-Factor Authentication (2FA / OTP) on all critical email and banking accounts.
- Recognize phishing emails: check sender domain name, beware of urgent prize/lottery messages.
Watch the video class above while following along with the practical exercises.
Key Summary & Revision Bullet Points
Quick cheat-sheet to review before online examinations.
• Phishing: Fraudulent attempt to steal sensitive data by disguising as a trustworthy entity.
• Malware: Malicious software including Viruses, Worms, Trojans, Spyware, and Ransomware.
• Malware: Malicious software including Viruses, Worms, Trojans, Spyware, and Ransomware.
Frequently Asked Viva & Exam Questions
Review these standard questions frequently asked in diploma exams and job interviews.
Q1: What is the difference between CC and BCC in email?
Ans: CC recipients are visible to everyone who receives the email. BCC recipients are hidden from all other recipients, preserving privacy.
Ans: CC recipients are visible to everyone who receives the email. BCC recipients are hidden from all other recipients, preserving privacy.
Interactive Chapter Quiz
Test your mastery immediately! Click an option to see instant answer feedback.
Q1 Which protocol is used to securely browse encrypted websites over the internet?
A. HTTP
B. FTP
C. HTTPS
D. SMTP
Explanation: HTTPS (Hypertext Transfer Protocol Secure) encrypts web communications.
Q2 In email terminology, what does BCC stand for?
A. Basic Carbon Copy
B. Blind Carbon Copy
C. Backup Client Communication
D. Binary Code Copy
Explanation: BCC stands for Blind Carbon Copy (addresses are hidden from other recipients).
Q3 Which protocol is responsible for sending outgoing email messages across servers?
A. POP3
B. IMAP
C. SMTP
D. HTTP
Explanation: SMTP (Simple Mail Transfer Protocol) sends outgoing emails.
Q4 What system translates domain names (e.g. google.com) into numerical IP addresses?
A. DHCP
B. DNS
C. FTP
D. VPN
Explanation: DNS (Domain Name System) maps web URLs to IP addresses.
Q5 What is the term for a deceptive attempt to steal user passwords or banking OTPs via fake messages?
A. Spamming
B. Phishing
C. Streaming
D. Defragmenting
Explanation: Phishing deceives victims into revealing sensitive personal credentials.