This document provides an overview of computer networks and networking concepts. It discusses network types including local area networks (LANs), metropolitan area networks (MANs), and wide area networks (WANs). It also covers common network devices like hubs, switches, routers and network interface cards. Additionally, it examines network topologies (bus, star, ring, mesh), transmission modes (simplex, half-duplex, full-duplex), and the differences between baseband and broadband transmission. The document serves as a high-level introduction to foundational networking topics.
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FellowBuddy.com is an innovative platform that brings students together to share notes, exam papers, study guides, project reports and presentation for upcoming exams.
We connect Students who have an understanding of course material with Students who need help.
Benefits:-
# Students can catch up on notes they missed because of an absence.
# Underachievers can find peer developed notes that break down lecture and study material in a way that they can understand
# Students can earn better grades, save time and study effectively
Our Vision & Mission – Simplifying Students Life
Our Belief – “The great breakthrough in your life comes when you realize it, that you can learn anything you need to learn; to accomplish any goal that you have set for yourself. This means there are no limits on what you can be, have or do.”
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Transmission media (data communication)Pritom Chaki
Transmission media is the material pathway that connects computers, different kinds of devices and people on a network. It can be compared to a superhighway carrying lots of information. Transmission media uses cables or electromagnetic signals to transmit data.
Although the OSI reference model is universally recognized, the historical and technical open standard of the Internet is Transmission Control Protocol / Internet Protocol (TCP/IP).
The TCP/IP reference model and the TCP/IP protocol stack make data communication possible between any two computers, anywhere in the world, at nearly the speed of light.
Here you will learn:
How to Connect two or more devices to share data and information.
What is OSI Model?
Introduction to OSI Model
What is Physical Layer?
Devices used Physical Layer
What is Signal?
Types of Signals?
Analog Signals
Digital SIgnals
What is Transmission Medium?
What Is Switch in Networking?
Networking 7 Layers.
.
Please like and comments your Question and suggestion?
IP specifies the format of packets, also called #datagrams, and the addressing scheme. Most networks combine IP with a higher-level protocol called Transmission Control Protocol (TCP), which establishes a virtual connection between a destination and a source.
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OSI layers describes how the data can be send from one parties to another during data communication. it also gives the detailed information of how the data functionally divided into small pieces and reaches the destination.
A computer network is defined as the interconnection of two or more computers. It is done to enable the computers to communicate and share available resources.
Components of computer network
Network benefits
Disadvantages of computer network
Classification by their geographical area
Network classification by their component role
Types of servers
TCP/IP have 5 layers, whereas OSI model have 7 layers in its Model. TCP/IP is known for the secured connection and comunication. I have explained all functions and definitions of layers in TCP/IP Model
#network #types of network
COMPUTER NETWORKING FUNDAMENTALS
SLIDE PPT CONSIST OF
definition,its components,advantages,Disadvantages,switching techniques,network architectures, and Types of Networks.
If you are interested in computer networking and more topics related to computers.
Must watch my youtube channel TECHISEASY
Transmission media (data communication)Pritom Chaki
Transmission media is the material pathway that connects computers, different kinds of devices and people on a network. It can be compared to a superhighway carrying lots of information. Transmission media uses cables or electromagnetic signals to transmit data.
Although the OSI reference model is universally recognized, the historical and technical open standard of the Internet is Transmission Control Protocol / Internet Protocol (TCP/IP).
The TCP/IP reference model and the TCP/IP protocol stack make data communication possible between any two computers, anywhere in the world, at nearly the speed of light.
Here you will learn:
How to Connect two or more devices to share data and information.
What is OSI Model?
Introduction to OSI Model
What is Physical Layer?
Devices used Physical Layer
What is Signal?
Types of Signals?
Analog Signals
Digital SIgnals
What is Transmission Medium?
What Is Switch in Networking?
Networking 7 Layers.
.
Please like and comments your Question and suggestion?
IP specifies the format of packets, also called #datagrams, and the addressing scheme. Most networks combine IP with a higher-level protocol called Transmission Control Protocol (TCP), which establishes a virtual connection between a destination and a source.
If you want to purchase the content e-mail me on dulith1989@gmail.com
OSI layers describes how the data can be send from one parties to another during data communication. it also gives the detailed information of how the data functionally divided into small pieces and reaches the destination.
A computer network is defined as the interconnection of two or more computers. It is done to enable the computers to communicate and share available resources.
Components of computer network
Network benefits
Disadvantages of computer network
Classification by their geographical area
Network classification by their component role
Types of servers
TCP/IP have 5 layers, whereas OSI model have 7 layers in its Model. TCP/IP is known for the secured connection and comunication. I have explained all functions and definitions of layers in TCP/IP Model
#network #types of network
COMPUTER NETWORKING FUNDAMENTALS
SLIDE PPT CONSIST OF
definition,its components,advantages,Disadvantages,switching techniques,network architectures, and Types of Networks.
If you are interested in computer networking and more topics related to computers.
Must watch my youtube channel TECHISEASY
Types of Networks
There are several different types of computer networks. Computer networks can be characterized by their size as well as their purpose.
The size of a network can be expressed by the geographic area they occupy and the number of computers that are part of the network. Networks can cover anything from a handful of devices within a single room to millions of devices spread across the entire globe.
Some of the different networks based on size are:
Personal area network, or PAN
Local area network, or LAN
Metropolitan area network, or MAN
Wide area network, or WAN
What is a network?
Need for networking
Components of Network
Types of Network
Evolution of Networking
Communication media
Data Communication Terminologies
Switching Techniques
Digital and Analog Transmission
Network Topology
Network Devices
Communication Protocols
Wireless/Mobile Computing
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Course Code: CS-301
Course Title: Introduction to Computing.
Degree: BS (SE, CS, BIO)
Contents of this chapter:
Basic information about computer networks, types of computer networks. Other contents include:
1. List four major benefits of connecting computers to form a network.
2. Define the terms LAN, WAN, and MAN.
3. List the three types of networks.
4. Name the three physical topologies used to build networks.
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2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
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Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
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Introduction to Computer Networks Lecture slides ppt
1. Week-10
Introduction to Computer Networks
Application of Computer Network
Host, Terminal, Client Server Network, Peer to Peer Network
Networking Devices (NIC (Physical Address), Modem, Hub,
Switch & Router)
Categories of Network
Network Topology (Bus, Star, Ring and Mesh Topology)
Bandwidth, Broadband & Baseband Communication
Transmission Modes (Simplex, Half Duplex, & Full Duplex)
2. Network
A network is a set of devices (often referred to as nodes) connected
by communication links.
A node can be a computer, printer, or any other device capable of
sending and/or receiving data generated by other nodes on the network.
A group of computers and other devices joint together through some
transmission medium is called Computer Network.
3. The concept of connected computers sharing resources is called
Networking.
Computer network that is part of network can share the following, Data,
Messages, Graphics, Printers, Modem, Fax machine & other Hardware
resources.
Why Computer Network?
To share information or receive a service via a network, or group of
members able to communicate with each other.
4. Applications of Networks
Resource Sharing
Hardware (computing resources, disks, printers)
Software (application software)
Information Sharing
Easy accessibility from anywhere (files, databases)
Search Capability (WWW)
Communication
Email
Message broadcast
5. What do you find on a network?
The following types of nodes may be found on a data communications
system.
Host: - A central computer which stores data and executes programs
for terminals.
It is usually associated with minicomputers or mainframes.
It requires a multi-tasking, multi-user operating system such as Unix.
Terminal: - A computing device which is composed of a video screen
and a keyboard. It allows a user to communicate with a host by typing
in information or commands.
The host communicates with the terminal by updating the CRT (video).
Terminals cannot execute programs.
6. Client
A computer which takes advantage of the services provided by servers on
the network.
Client also called Front End computer.
Server
The computer which used and provide services & resources is called
Server.
Server is also called Back End computer.
A Network with two Clients and one Server.
What do you find on a Network? (Cont’d)
7. Client Server Network
Server based network also called client-server network, containing Client &
the server that support them.
The Web is known as a client-server system. Your computer is the client;
the remote computers that store electronic files are the servers.
Examples include file, print or communication servers.
What do you find on a Network? (Cont’d)
8. Peer-to-Peer Network: - Peer-to-Peer or simply peer means the computer
which has both qualities as server as well as client.
It means which both use & provide network resources.
Peer network which have no servers & use the network to share resources
among independent peers.
Users simply share disk space & resources, such as printers & faxes.
In a peer-to-peer system there are no fixed clients and servers.
What do you find on a Network? (Cont’d)
9. Network Interface Card
A computer is connected to the network cabling with a network
interface card, (also called a "NIC", "nick", or network adapter.
Faster computers, like high-speed Pentiums, Dual Core, and Core 2
Duo or Core 2 Quad, often have 32-bit, 64-bit or PCI slots.
These PCs require 32-bit NICs to achieve the fastest networking
speeds possible for speed-critical applications like desktop video,
multimedia, publishing, and databases.
10. Physical address: - It is also known as link address.
The physical addresses have authority over the network (LAN & WAN).
Ethernet uses a 48-bit (6-byte) physical address written as 12 hexadecimal
digits; every byte (2 hexadecimal digits) is separated by a colon.
The first 6 Hexa-decimal digits of a Mac address contain a manufacturer,
identification (vender code) also known as the organizationally unique
identifier (OUT). The last 6 digit are given by each vender and often the
represents the interface serial no.
On most LAN interface card the MAC address is burned into ROM. It is
only used for LAN communication.
07:01:02:01:2C:4B
A 6-byte (12 hexadecimal digits) physical address.
Network Interface Card (Cont’d)
11. Example:
In Figure, a node with physical address 10 sends a frame to a node with
physical address 87. The two nodes are connected by a link (bus
topology LAN). As the figure shows, the computer with physical address
10 is the sender, and the computer with physical address 87 is the
receiver.
Network Interface Card (Cont’d)
12. MODEM short for modulator/demodulator.
The modem is necessary because the phone network transmits audio, not
data bits.
The modem is for compatibility with existing equipment.
Modulation is a prescribed method of encoding digital (or analog) signals
onto a waveform (the carrier signal).
Once encoded, the original signal may be recovered by an inverse process
called demodulation.
MODEM
13. HUB
HUB is a common connection point for devices in a network.
The benefits of HUB used in a network is that if a cable break on a
network, the break cable node will only affected and not affect on
the rest of network.
HUB internally uses BUS topology.
Network can be easily expanded using Hubs.
Active Hub: - A HUB that regenerate and retransmit signals are
called Active Hub.
Active HUB is also called multi-port repeater.
Active HUB requires electrical Power to run.
Passive HUB: - A HUB that do not regenerate and do not
retransmit signals are called Passive HUB.
Passive HUB do not require electrical power to run.
14. Connector RJ-45
The standard connector for twisted pair cabling is an RJ-45
connector. This is a plastic connector that looks like a large
telephone-style connector.
Cable used as a medium to carry the signal.
Coaxial Cable
Twisted-Pair Cable
Fiber-optic Cable
15. Today when we speak, we are generally referring the primary
categories LAN, MAN and WAN.
The category into which a network falls is determined by
Technology,
its Size,
Standard Port & Media.
Categories of Networks
16. A Local Area Network can connect many types of computing devices
together such as microcomputers, minicomputers and switches.
A LAN is usually privately owned links the devices in a single office,
building, or campus.
Depending on the need of organization and the type of technology used.
A LAN can be as simple as two PCs and a printer in someone’s home
office, or it extend throughout a company and include voice, sound, and
video peripherals. Currently LAN size is limited to a few kilometers.
Ethernet, token ring
Local Area Network
17. It has two main components Hardware & Software.
Network hardware includes NIC, Hub, Switch, Medium, Connectors
(RJ-45).
Network software includes, Protocols (TCP/IP), Network services.
It usually uses cable (coaxial, twisted pair or fiber) but may use
radio waves, infrared or micro waves.
It is used by a single organization.
Local Area Network (Cont’d)
18. A high speed (100Mbps) network which spans city distances. or
It may be a single network such as a cable television network, or
It may be a means of connecting a number of LANs into a larger
network, so that resources may be shared LAN-to-LAN as well as
device-to-device. FDDI, ATM
Many telephone companies provided a popular MAN service called
Switched Multi-megabit Data Service (SMDS). It is a service for
handling high-speed communication for metropolitan area network.
A metropolitan area network based on cable TV.
Metropolitan Area Network
19. WAN: - The network between different cities, countries or in the world
using WAN standard port & routing technology is called WAN.
A WAN is a network that covers a large geographical area using
communication channel that combines many types of media such as
telephone lines, cables & radio waves.
The Internet is the worlds largest WAN.
They use data lines which belong to a third party service provider such as
the telephone company.
They require special interfaces to the data lines such as synchronous
modems & routers.
Routing technology is a crucial component of a WAN. Routers decide how a
packet should be sent in order that it arrives at its intended destination.
Wide Area Network
20. Line Configuration
Line Configuration defines the attachment of communication Devices to a
link. OR
It concerned with the connection of devices to the media.
22. A bus topology is a multipoint. One long cable acts as a backbone to
link to the entire device in a network.
In this topology all the computers are connected in a series to one
cable.
Nodes are connected to the bus cable by drop-line and tap.
A drop-line is a connection running b/w the device and main cable.
A tap is a connector that either splices into the main cable to
create a contact with the metallic core.
Bus Topology
23. In star topology, each device has a dedicated point-to-point link
only to the central controller, usually called HUB.
In star topology communication with a central HUB that resend
the message either to all the computers
(in a broadcast star network) or only to the destination computer
(in a switch star network).
The devices are not directly linked to one another. The controller
acts as an exchange, if one device want to send data to another,
it send the data to the controller, which than relays the data to
the other connected device.
Star Topology
24. In ring topology, each device has a dedicated point-to-point
connection with only to the two devices on either side of it.
A signal is passed along the ring in one direction, from device to
device, until it reaches its destination.
Each device in the ring incorporates the repeater, when a device
receives a signal intended for another device; its repeater generates
the bit and passes them along.
Ring Topology
25. In mesh topology, every device has a dedicated point-to-point
link to every other device.
The term dedicated means that link carries traffic only b/w two
devices it connects.
So we need n (n-1) physical link, however, if physical link allow
communication in both direction (duplex mode), we can divide the no;
of links by 2.
In other words we can say that in mesh topology we need n (n-1)/2
duplex mode links.
Mesh Topology
26. Bandwidth, Baseband & Broadband Transmission
Bandwidth refers to the way of allocating the capacity of
transmission media.
The total media capacity or bandwidth can be divided into
channels.
A channel is simply a portion of the bandwidth that can be used for
transmitting data.
The two ways of allocating the capacity of bounded transmission
media are the following.
Base band transmission
These transmissions use the entire media bandwidth for a single
channel. Base band is commonly used for digital signaling. It can
also be used for analog signals. Most LANs use base band signaling.
27. Broadband transmission: - These transmissions provide the ability
to divide the entire media bandwidth into multiple channels.
Since each channel can carry a different analog signals, broad band
network support multiple simultaneous conversion over a single
transmission medium.
Baseband & Broadband Transmission (Cont’d)
28. Data Transmission Modes
There are three modes of communication.
Simplex
In simplex transmission mode, communication can take place in only
one direction.
It means the sender will always send & the receiver will always
receive.
An example is TV waves, we can watch different channels on TV but
there is no need to send any type of signals from TV. Another
example is line printer.
Half-Duplex
A half-duplex system can transmit data in both direction, but only in
one direction at a time.
It means that at a time one computer can only send or receive, when
one device completes a transmission, this device must “turn over” the
medium to the other device so that this second device has turn to
transmit. e.g. wireless
29. Full-Duplex
This mode allows a device to send & receive data simultaneously
is called duplex or full-duplex mode.
This mode provides two ways to simultaneously data transfer by
providing each device with a separate communication channel.
Voice telephone is full-duplex devices and either party to a
conversation can talk at any time.
Data Transmission Modes (Cont’d)