https://drive.google.com/file/d/1rSvT5Xo9IPNrlbhENw796llYzRflglkp/view?usp=sharing This document, covering the Application Layer of computer networks, introduces several fundamental Internet services and protocols essential for modern communication and data exchange. It begins with the Domain Name System (DNS), explaining its distributed, hierarchical structure used to translate domain names into IP addresses, contrasting it with the older, centralized hosts.txt file method. The discussion then moves to Electronic Mail (E-mail), detailing its architecture, basic functions like composition and transfer, and the message format, including the roles of the header and body within the envelope. Key application layer protocols are also covered. Simple Mail Transfer Protocol (SMTP) is presented as the communication guideline for transmitting email over the Internet, outlining its components and working mechanism. The World Wide Web (WWW) is defined as a collection of linked documents ...
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Unit-1
MCQ:1,2,3,4,5,6,7,8
FIB:1,2,4,7
MF:1,3
D.Q:1,2,5,6,12
Unit-2:
MCQ:1,2,3,4,5,6,7,8
FIB:1,4,5,6
MF:1,4
D.Q:2,3,5,9
unit-3
MCQ:1,2,3,5
FIB:1,2,3,5
D.Q:1,2
UNIT-3
MCQ-10,11,13,14
FTB-11,12,13,15
Qus-10,12,15
UNIT-4
MCQ-1,2,3,4,8,12,14,15
FTB-3,7,11,15
MTF-1,7
Qus-4,6,8
UNIT-5
MCQ-1,2,5,6,7,8,10
FTB-7,9,10
MTF-2,5
Qus-1,2,3,8