GBSSS - Govt. Boys Sr. Sec. School Khajoori Khas Delhi -90: August 2022

Wednesday, August 10, 2022

10 Aug - HTML Formatting Tags

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12 - CS

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<center><h1>GBSSS KHAJOORI KHAS</h1></center>

<h2>Hello from HTML</h2>

<h3>Hello from HTML</h3>

<h4>Hello from HTML</h4>

<h5>Hello from HTML</h5>

<h6>Hello from HTML</h6>

Hello from India <br>

Hello from HTML <br>

<img src="pop-protocol.png" alt="POP Protocol Image not found"

height="200px" width="300px" border="3"/>

<h1>Formatting Tags</h1>

<b>Hello from HTML - Bold</b><br>

<strong>Hello from HTML - Bold</strong><br>

<u>Hello from HTML - Underline</u>

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<i>Hello from HTML -Italic</i>

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<em>Hello from HTML - Emphasis</em>

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<mark>Hello from HTML</mark>

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X<sup>2</sup>+Y<sup>2</sup>=R<sup>2</sup>

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H<sub>2</sub>SO<sub>4</sub>

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SYLLABUS FOR CLASS - 12 COMPUTER SCIENCE

NOTES FOR CLASS - 12 COMPUTER SCIENCE

PRACTICAL FILE FOR CLASS - 12 COMPUTER SCIENCE

PROJECT FILE FOR CLASS - 12 COMPUTER SCIENCE

SAMPLE PAPER FOR CLASS - 12 COMPUTER SCIENCE

PRACTICE SETS FOR CLASS - 12 COMPUTER SCIENCE

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Anchor Tag - Hyperlink

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<a href="https://www.gbsss.in/p/syllabus-for-class-12-computer-science.html">GBSSS</a>

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<a href="12-IP-1.html" target="_">jkdfsajhfbjhdsa</a>

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Tuesday, August 9, 2022

Browser Settings and Shortcut Keys

Difference between Star and Mesh Topology

Difference between Bus and Star Topology

Network Topology

Topology

Topology defines the structure of the network of how all the components are interconnected to each other.

Physical topology is the geometric representation of all the nodes in a network.

Difference between Switch and Router

Switch:

1. Switch is a networking device.

2. Switch is a data link layer device.

3. Switch works in LAN (Local Area Network)

4. Switch works in same network.

5. Switch is an intra-network device

6. Switch use MAC (Media Access Control) address

7. Switch is an intelligent device

8. Data use as a frame format in switch.

9. Switch use CAM (Content Accessable Memory) table

10. Switch usally used in 8/16/24/48 ports

11. Switch is a multiport device.

12. Switch is a full duplex device

13. No collision occurs in switch.

14. In switch every port has its collision table.

15. Switch support advanced features like VLAN, STP, RSTP etc.

16. Switch is faster than router.

17. Switch support 10 Mbps to 1 Gbps speed.

Router:

1. Router is a networking device.

2. Router is a Network Layer device.

3. Router works for WAN (Wide Area Network)

4. Router works for communication between different network.

5. Router is an inter network device.

6. Router use IP address

7. Data use as a packet in Router.

8. Router perform routing operation

9. Router use routing table.

10. Router usally support 2/4/8 etc ports

11. Router is slower than switch.

12. Router support 10 Mbps to 100 Mbps speed

Difference between Hub and Switch

HUB:

1. Hub is a network device

2. Hub is a Physical Layer device.

3. Hub is a multiport device.

4. Signal travel in the form of bits in Hub.

5. Hub support electric signal

6. Hub is a half duplex device

7. Hub is an unintelligent device

8. Hub does not learn or store MAC address

9. Collision occurs commonly in Hub

10. Hub support only single collision dimension

11. Hub does not support Advanced features like VLAN, STP, RSTP etc.

Switch:

1. Switch is a networking device.

2. Switch is a data link layer device.

3. Switch works in LAN (Local Area Network)

4. Switch works in same network.

5. Switch is an intra-network device

6. Switch use MAC (Media Access Control) address

7. Switch is an intelligent device

8. Data use as a frame format in switch.

9. Switch use CAM (Content Accessable Memory) table

10. Switch usally used in 8/16/24/48 ports

11. Switch is a multiport device.

12. Switch is a full duplex device

13. No collision occurs in switch.

14. In switch every port has its collision table.

15. Switch support advanced features like VLAN, STP, RSTP etc.

16. Switch is faster than router.

17. Switch support 10 Mbps to 1 Gbps speed.

Hardware devices that are used to connect computers, printers, fax machines and other electronic devices to a network are called network devices. These devices transfer data in a fast, secure and correct way over same or different networks. Network devices may be inter-network or intra-network. Some devices are installed on the device, like NIC card or RJ45 connector, whereas some are part of the network, like router, switch, etc.

Types of network devices

·         Hub
·         Switch
·         Router
·         Bridge
·         Gateway
·         Modem
·         Repeater
·         NIC Card

Introduction to Network - Class 12 CS/IP

Computer Network

Computer network is a technology to connect hardware, software for sharing the information.

A network consists of two or more computers that are linked in order to share resources

A network is a collection of computers, servers, mainframes, network devices, peripherals, or other devices connected to allow data sharing.

Difference Between LAN, MAN, WAN

Basis	LAN	MAN	WAN
Full-Form	LAN stands for local area network.	MAN stands for metropolitan area network.	WAN stands for wide area network.
Geographic Span	Operates in small areas such as the same building or campus.	Operates in large areas such as a city.	Operates in larger areas such as country or continent.
Ownership	LAN’s ownership is private.	MAN’s ownership can be private or public.	While WAN also might not be owned by one organization.
Transmission Speed	The transmission speed of a LAN is high.	While the transmission speed of a MAN is average.	Whereas the transmission speed of a WAN is low.
Propagation delay	The propagation delay is short in a LAN.	There is a moderate propagation delay in a MAN.	Whereas, there is a long propagation delay in a WAN.
Congestion	There is less congestion in LAN.	While there is more congestion in MAN.	Whereas there is more congestion than MAN in WAN.
Design & Maintenance	LAN’s design and maintenance are easy.	While MAN’s design and maintenance are difficult than LAN.	Whereas WAN’s design and maintenance are also difficult than LAN as well MAN.
Fault tolerance	There is more fault tolerance in LAN.	While there is less fault tolerance.	In WAN, there is also less fault tolerance.

Types of Network - LAN, MAN, WAN

Types of Network

A computer network can be categorized by their size. A computer network is mainly of four types:

LAN(Local Area Network)
PAN(Personal Area Network)
MAN(Metropolitan Area Network)
WAN(Wide Area Network)

LAN(Local Area Network)

Local Area Network is a group of computers connected to each other in a small area such as building, office.
LAN is used for connecting two or more personal computers through a communication medium such as twisted pair, coaxial cable, etc.
It is less costly as it is built with inexpensive hardware such as hubs, network adapters, and ethernet cables.
The data is transferred at an extremely faster rate in Local Area Network.
Local Area Network provides higher security

PAN(Personal Area Network)

Personal Area Network is a network arranged within an individual person, typically within a range of 10 meters.
Personal Area Network is used for connecting the computer devices of personal use is known as Personal Area Network.
Personal Area Network covers an area of 30 feet.
Personal computer devices that are used to develop the personal area network are the laptop, mobile phones, media player and play stations.

There are two types of Personal Area Network:

Wired Personal Area Network
Wireless Personal Area Network

Wireless Personal Area Network: Wireless Personal Area Network is developed by simply using wireless technologies such as WiFi, Bluetooth. It is a low range network.

Wired Personal Area Network: Wired Personal Area Network is created by using the USB.

Tuesday, August 2, 2022

Domain Name

A domain name is a string of text that maps to a numeric IP address
Domain name is used to access a website from client software or browser.
It's the unique name that appears after the @ sign in email addresses, and after www. in web addresses.

for example:

spsharmag@gmail.com

www.gbsss.in

here gmail.com and gbsss.in are domain name

4. Domain name is the name of a website

5. Domain names are a key part of the Internet infrastructure. They provide a human-readable address for any web server available on the Internet.

6. (TLD) Top-Level Domain

7. TLDs tell users the general purpose of the service behind the domain name. The most generic TLDs (.com, .org, .net)

Monday, August 1, 2022

POP3 - 12 CS

POP3

1. POP stands for Post Office Protocol.

2. The first version of post office protocol was introduced in 1984.

3. Post Office Protocol version 2 launched in 1985.

4. Post Office Protocol version 3 launched in 1988.

5. POP3 is used for retrieving the emails from the server.

6. POP3, is the most commonly used protocol for receiving email over the internet.

7. In POP3 the mail can only be accessed from a single device at a time.

8. To read the mail it has to be downloaded on the local system.

9. The user can not create, delete or rename email on the mail server.

12 CS Weekly Plan - 01 Aug 2022 to 06 Aug 2022

01 Aug 2022

POP3, IMAP, PPP, TELNET, VoIP

02 Aug 2022

WWW, Domain Name, URL, Web Browser

03 Aug 2022

Browser Add - Ons and Plug-ins

04 Aug 2022

Introdution to HTML, History of HTML

05 Aug 2022

\ Types of HTML Tags

08 Aug 2022

Heading, Center, hr, br, img tags

10 Aug 2022

Formatting Tags

12 IP - Weekly Plan - 01 Aug 2022 to 06 Aug 2022

01 Aug 2022

VoIP
Introduction to Web Browser
Commonly Used Web Browsers

02 Aug 2022

Browser Setting

03 Aug 2022

Browser Add-Ons and Plug -ins

04 Aug 2022

Cookies, Introduction to Website

05 Aug 2022

Difference between Website and Webpage, History of HTML

08 Aug 2022

Heading, Center, br, img tags

10 Aug 2022

Difference between Static and Dynamic Website, Web Server, Hosting

Pages

Wednesday, August 10, 2022

Tuesday, August 9, 2022

Switch:

Router:

HUB:

Switch:

Computer Network

Types of Network

LAN(Local Area Network)

PAN(Personal Area Network)

Tuesday, August 2, 2022

Domain Name

Monday, August 1, 2022

POP3

01 Aug 2022

02 Aug 2022

03 Aug 2022

04 Aug 2022

05 Aug 2022

08 Aug 2022

10 Aug 2022

01 Aug 2022

02 Aug 2022

03 Aug 2022

04 Aug 2022

05 Aug 2022

08 Aug 2022

10 Aug 2022