Unit 2
Unit 2
Unit 2
Internet
Security
Data Protection
A “network” enables associated PCs to share documents and
information and also equipment assets,
Internet Protocol Internet is assigned an IP address, and as packets are directed to the IP
address attached to them, data arrives where it is needed.
(IP)
Once the packets arrive at their destination, they are handled differently
depending on which transport protocol is used in combination with IP.
The most common transport protocols are TCP
The Transmission Control Protocol (TCP) is a transport
protocol, meaning it dictates the way data is sent and received.
A TCP header is included in the data portion of each packet
that uses TCP/IP. Before transmitting data, TCP opens a
connection with the recipient. TCP ensures that all packets
arrive in order once transmission begins. Via TCP, the recipient
will acknowledge receiving each packet that arrives. Missing
TCP/IP packets will be sent again if receipt is not acknowledged.
TCP is designed for reliability, not speed. Because TCP has to
make sure all packets arrive in order, loading data via TCP/IP
can take longer if some packets are missing.
TCP and IP were originally designed to be used together, and
these are often referred to as the TCP/IP suite.
The World Wide Web—commonly referred to as WWW,
W3, or the Web—is an interconnected system of
public web pages accessible through the Internet.
World Wide Web
A collection of websites or web pages stored in web servers and
connected to local computers through the internet.
The Internet is a worldwide network of devices like computers,
laptops, tablets, etc. It enables users to send emails to other
users and chat with them online. For example, when you send
an email or chat with someone online, you are using the
Difference between internet.
World Wide Web when opening a website like google.com for information, the
and Internet World Wide Web works; a network of servers over the internet.
You request a webpage from your computer using a browser,
and the server renders that page to your browser. Your
computer is called a client who runs a program (web browser),
and asks the other computer (server) for the information it
needs.
A search engine is a software system designed to
carry out web searches.
Search Engine A search engine is a web-based tool that enables users
to locate information on the World Wide Web. Popular
examples of search engines are Google and Yahoo.
A URL (Uniform Resource Locator) is a unique identifier used to
locate a resource on the Internet. It is also referred to as a web
address.
Just as buildings and houses have a street addresses, web
pages also have unique addresses to help people locate them.
URL (Uniform On the Internet, these addresses are called URLs (Uniform
Resource Locator) Resource Locators).
=IF C3=70,"Pass","Fail"
=IF(C3=70,"Fail","Pass")
=IF(C3=70,Fail,Pass)
=IF(C3=70,"Pass","Fail")
Answer
=IF(C3=70,"Pass","Fail")
Show the total marks for all the students those are having more than 50 in the marketing
subject. Write the formula.
Answer
=SUMIF(B2:B10,"<=50")
Show the total number of students those are having more than 60 in the Economics subject.
Write the formula.
Answer
=COUNTIF(A2:A10, ">=50")
What will be the result if the formula =Count(A2:A10) is applied
What will be the result if the formula =Counta(A2:A10) is applied
What will be the result if the formula =Countblank(A2:A10) is applied
What will be the result if the formula =Count(A2:A10) is applied
=6
What will be the result if the formula =Counta(A2:A10) is applied
=10
What will be the result if the formula =Countblank(A2:A10) is applied
=2
Which values are able to type into
the cell if it has the following the
given data validation rule?
Answer
BBA, MBA and MTech