Page 6 - Web Applications (803) Class 11
P. 6
INSIDE THE SERIES
The key features of the series have been designed to ensure better learning, assessment and evaluation.
Learning Resources
Coaxial Cable
By connecting several local area networks, a MAN makes resource sharing easier. One of the best examples of MAN is Notes helps to reduce cross talk and electrical signal interference. The core copper conductor is used to transmit signals, the
a cable television network within a city.
MAN
An electrical cable containing a copper conductor, an insulator covering it, and a braided metal mesh that reduces
crosstalk and signal interference is known as a coaxial cable. A braided metal conductor surrounds the insulator, which
Protective
LAN long-lasting because of their improved cut-through resistance.
This section contains additional
Plastic Layer
insulator to provide insulation to the copper conductor. To further safeguard the cable, the entire set-up is once more
wrapped with a layer of protective plastic. Coaxial cable installation is simple. These cables are more dependable and
Braided
information to enrich the subject. Insulator
LAN Metal Conductor
Copper
LAN Conductor
LAN Fibre Optic Cable
LAN
A WAN, which is slightly more complicated than a LAN, connects computers over longer physical distances. It enables Do you Know? optical fibres that are plastic-coated and utilised to transmit data via light pulses. The plastic coating shields the optical
computers and low-voltage devices to communicate over a single huge network even when they are thousands of
kilometres distant. It establishes links within a country or continent by connecting several local and metropolitan area
Wide Area Network (WAN) This section contains a However, fibre optic cable installation and upkeep are expensive and challenging.
networks. The Internet is the most fundamental type of WAN, as it connects millions of computers worldwide. A WAN
A cable that communicates through electrical impulses is referred to as a fibre optic cable. These cables contain the
is often owned and maintained by many administrators or the general public because of its extensive reach.
fibres from the effects of other types of wiring’s electromagnetic interference, heat, and cold. Compared to copper
2 cm High density polyethylene
insulation (17 mm)
wires, fibre optic cables offer faster data transmission. There is no electromagnetic interference that affects them.
fact about the topic.
Copper tubing (8.3 mm)
1 cm
Steel wires
LAN Water-resistant jelly
casing 2.3 mm)
LAN
Do You Know? Optical
fibers
• Coax is another name for coaxial cable.
• Alexander Graham Bell is credited with creating Twisted Pair cables.
LAN • In addition to being used for telecommunications, fibre optic wire is also employed by lasers, hydrophones
Unguided Media
for seismic waves, SONAR, imaging devices, and sensors for measuring temperature and pressure.
Another type of network, VPN (Virtual Private Network), is quite popular nowadays. VPN technology allows you Ð 114 a result, it’s also called wireless transmission. Features of unguided media are as follows:
to access the web without worrying about your personal information being exposed to the public. While a VPN
ÐThe signal travels over empty space (air).
Notes can mask your IP address, hide you from third parties, and encrypt your data, cyber hackers can still hack your Touchpad Web Applications-XI
The electromagnetic waves are transmitted without the need of any physical medium in an unguided transmission. As
account. VPN encryption, on the other hand, makes this nearly impossible.
Touchpad Web Applications-XI
112
Video Session
This section contains link of
videos related to topics to
enrich the subject.
ÐAs leaf nodes can add more nodes to the hierarchical chain, it has high scalability.
ÐIt combines the best features of bus and star topologies.
Advantages
Ð
Ð ÐIf one of a network’s nodes is damaged, the other nodes are unaffected.
Ð ÐIt allows for simple maintenance and defect detection.
Ð ÐSeveral hardware and software companies support it.
ÐIn comparison to star and bus topologies, large cabling is required.
Disadvantages
Ð
Ð ÐWhen a hub fails, the entire network fails. Subject Enrichment
Ð ÐOther network topologies are easier to configure than tree networks. Communication
Ð
Scan the QR code or visit the following link to watch the video: Network Topology
Video Session
https://www.youtube.com/watch?v=uSKdjjw5zow
.....................................................................................................................................................................................
Now answer the following questions:
.....................................................................................................................................................................................
2. Which topology is the simplest to install?
1. Which topology will be suitable for your school?
Differentiable equations, dynamical systems, knot theory, and Riemann surfaces in complex analysis are all
examples of topology in Mathematics. It’s also used in Physics to describe the universe’s space-time structure
Notes
and in string theory.
Touchpad Web Applications-XI
120
Ð
Ð ÐIs WYSIWYG Web Builder's FTP connection being blocked by your firewall?
РБUse passive mode for transfers’ should be enabled.
Ð
Ð ÐIncrease the connection timeout to at least 120 seconds (Menu→Options→publish).
ÐIf the transfer takes a long time, it’s likely that you utilised really huge photographs.
GLOSSARY Glossary Ð ÐIf your website appears to be out of date, select 'Refresh' on your browser several times!
Network Interface Unit: It is a device that aids in the communication between the server and the workstations.
Recap Zone
Packet Switching: It is a switching technology that routes packets between nodes over shared data lines with Ð Ð Ð A website is a collection of web pages that convey information about a specific company, organisation, or product.
Bandwidth: It refers to the range of frequencies that can be used to transmit data.
This section contains Ð A website can be opened and viewed on a software called web browser. Google Chrome, Internet Explorer, Mozilla
other traffic. Ð
Firefox, Opera are web browsers which are often used.
networking.
Transmission Medium: It is a device that transmits data from one computer to another. definition of common Ð Ð The most basic type of website is a static website, which is simple to develop. HTML, CSS, and JavaScript are used to
create the website.
Ð Websites are built with a specific purpose in mind, such as business, education, media and entertainment, or social
Modem: It is a device that allows a computer to send and receive data through a phone or cable line. Ð Ð Ð A dynamic website is one that changes or customises itself on a regular basis and without human intervention. Computer
Repeater: It is an electronic device that amplifies and retransmits a received signal over a network. terms. Ð Ð HTML (Hypertext Markup Language) is the most widely used language for developing webpages.
code that generates HTML generates server-side dynamic pages "on the fly".
screen.
Cookie: It is a small text file that usually contains the name of the website from which it came, as well as a Ð picture, video, audio, and so on).
Cracking: It is a means of gaining unauthorised access to a computer with the goal of causing harm.
unique ID tag. Ð Ð Attributes are tag sub-elements or features that provide additional functionality by allowing a user to change the marked-
Ð HTML webpages are simple text files with special “tags” that a web browser interprets and displays on your computer
up elements in various ways.
er mask: It a vital tool for modifying images that enables us to manage transparency and other elements. Ð Ð The anchor tag in html is used to create an external link.
Ð A Tag is a formatting specification that directs a web browser how to display the information it marks up or encloses (text,
Background layer: It is the only layer that exists when we create a new image in GIMP. Ð Ð Ð An HTML internal link connects two pages on the same website.
Lay HTML (Hypertext Markup Language): It is the most widely used language for developing webpages. Ð Ð Ð A frameset is a collection of frames in the browser window.
Ð External links are formed when you want to go to another page or URL by clicking on a link on a webpage.
ernal Style Sheet: It is used to define style sheet rules in a separate.css file and then use the HTML link Ð
Frameset: It is a collection of frames in the browser window. Ð Ð CSS is a method sheet language that gives web designers control over how their websites connect with web browsers,
Ð HTML frames divide your browser window into many portions, each of which can load a different HTML document.
computer browsers.
including how their HTML documents are formatted and displayed.
tag to include that file in your HTML content. Ð Ð Ð In an HTML document, you can apply CSS in three different ways—Internal, External and Inline.
Ext
your HTML content.
Infinite Loop: It is a piece of code that never ends because it never reaches the ending condition.
Ð CSS, or cascading style sheets, is a text-based coding language that specifies webpage formats and how they interact with
Operator: An operator is a symbol that is used to perform calculation on operands. Recap Zone Ð Ð Ð Ð A selector and a declaration block make up a CSS rule.
Ð External Style Sheet—Define style sheet rules in a separate.css file and then use the HTML link tag to include that file in
This section contains the Ð Ð Ð One or more declarations are separated by semicolons in the declaration block.
Ð Internal Style Sheet—Using the <style> tag, define style sheet rules in the HTML document's header section.
Ð Inline Style Sheet—Using the style attribute, define style sheet rules inline alongside HTML components
Ð The selector identifies the HTML element that needs to be styled.
Webpages, is at the heart of how the Internet works.
Glossary 399 summary of the chapter. Ð Ð The Domain Name System (DNS), which allows computers to communicate with one another and send email or display
in this procedure.
196 Ð A user's browser must obtain the IP address and submit queries to the name servers. Domain name resolvers are involved
Touchpad Web Applications-XI

