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Question - What is LAN?
Answer
LAN is a computer network that spans a relatively small area. Most
LANs are confined to a single building or group of buildings. However, one LAN
can be connected to other LANs over any distance via telephone lines and radio
waves. A system of LANs connected in this way is called a wide-area network
(WAN). Most LANs connect workstations and personal computers. Each node
(individual computer) in a LAN has its own CPU with which it executes programs,
but it also is able to access data and devices anywhere on the LAN. This means
that many users can share expensive devices, such as laser printers, as well as
data. Users can also use the LAN to communicate with each other, by sending
e-mail or engaging in chat sessions.
Question - What's the Difference Between an Intranet and the Internet?
Answer
There's one major distinction between an intranet and the Internet:
The Internet is an open, public space, while an intranet is designed to be a
private space. An intranet may be accessible from the Internet, but as a rule
it's protected by a password and accessible only to employees or other
authorized users.
From within a company, an intranet server may respond much more quickly than a
typical Web site. This is because the public Internet is at the mercy of
traffic spikes, server breakdowns and other problems that may slow the network.
Within a company, however, users have much more bandwidth and network hardware
may be more reliable. This makes it easier to serve high-bandwidth content,
such as audio and video, over an intranet.
Question - Define the term Protocol.
Answer
Protocol is a standard way of communicating across a network. A
protocol is the "language" of the network. It is a method by which two
dissimilar systems can communicate. TCP is a protocol which runs over a
network.
Question - Define File Transfer Protocol.
Answer
File Transfer Protocol (FTP), a standard Internet protocol, is the
simplest way to exchange files between computers on the Internet. Like the
Hypertext Transfer Protocol (HTTP), which transfers displayable Web pages and
related files, and the Simple Mail Transfer Protocol (SMTP), which transfers
e-mail, FTP is an application protocol that uses the Internet's TCP/IP
protocols. FTP is commonly used to transfer Web page files from their creator
to the computer that acts as their server for everyone on the Internet. It's
also commonly used to download programs and other files to your computer from
other servers.
Question - Explain the 7 Layers of OSI.
Answer
Layer 1: Physical layer
It represents all the electrical and physical specifications for
devices.
Layer 2: Data link layer
It provides the functional and procedural means to transfer data between
network entities and to detect and possibly correct errors that may occur in
the Physical layer.
Layer 3: Network layer
The Network layer provides the functional and procedural means of transferring
variable length data sequences from a source to a destination via one or more
networks.
Layer 4: Transport layer
It provides transparent transfer of data between end users.
Layer 5: Session layer
It controls the sessions between computers. It connects, manages and terminates
the connections between the local and remote application.
Layer 6: Presentation layer
It transforms data to provide a standard interface for the Application layer.
Layer 7: Application layer
It provides a means for the user to access information on the network through
an application.
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