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Introduction What is a Network?
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Presentation on theme: "Introduction What is a Network?"— Presentation transcript:
Chapter 4 Computer Networks
COMPUTER NETWORK TOPOLOGIES
Computer Network Topologies
INTRODUCTION TO COMPUTER NETWORKS Zeeshan Abbas. Introduction to Computer Networks INTRODUCTION TO COMPUTER NETWORKS.
Web Page Design Chapter 1 Introducing Networks and the Internet.
Saeed Darvish Pazoki – MCSE, CCNA Abstracted From: Sybex – Network+ Study Guide Network Fundamentals 1.
Copyright©2008 N.AlJaffan®KSU1 Chapter 8 Communications and Networks.
INTRODUCTION TO COMPUTER NETWORKS INTRODUCTION Lecture # 1 (
By: Aarman Tarapore 10cc. a network is a series of points or nodes interconnected by communication paths. Networks can interconnect with other networks.
Network topologies. What is a network topology? Physical arrangement of the devices in a communications network. Most commonly used are bus and star.
This is the way an organisation distributes the data across its network. It uses different types of networks to communicate the information across it.
Chapter 4: Computer Networks Department of Computer Science Foundation Year Program Umm Alqura University, Makkah Computer Skills /1436.
NETWORK Topologies An Introduction.
What Is A Network A network is a group of computers interconnected with communication lines which allows users to share information and resources.
Chapter 4 Computer Networks – Part 1
Information Technology Lecture No 3 By: Khurram Shahid.
Server is ‘host’ Clients do not communicate with each other.
Lecture 4 Title: Network Components and Types By: Mr Hashem Alaidaros MIS 101.
NETWORKING. OBJECTIVES Identify network topologies Identify hardware components of a network.
Computer Networks & Topologies Group Members Shahid Ahmed Sp11-Bba-100 Shahzad Zeb Sp11-Bba-084 Nadia Naseer Abbasi Sp11-Bba-079 Ahsan Bashir Sp11-Bba-007.
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Networking with PowerPoint: Use Your Presentation to Build Your Network
LinkedIn, Xing, your personal blog – all are great tools for increasing your visibility in the business community. But what about networking with PowerPoint presentations? A presentation doesn’t have to end with the last slide. Engaging with your audience is the key to creating networking opportunities once your PowerPoint presentation is finished.
Networking: What is it and how do you make new business contacts?
Networking is the process of building and maintaining a system of contacts. Each member of the network brings their own contacts, leading the network to continue growing.
A network brings a lot of advantages. Professional support and shared knowledge are not the only benefits; a network also brings career-building advantages. Network contacts often make a job search a much simpler process and can even help kick-start a career.
We’ve put together four effective networking tips to help you start networking with PowerPoint:
1. Set goals
Decide what you hope to gain from your contacts and what you hope to achieve through networking.
2. Quality over quantity
A good network is only as valuable as its members. Don’t keep adding new members for the sake of statistics – only add new members that are pursuing similar goals.
3. Give and take
The best way to get a network started is to find contacts with the same goals and professional interests. Exchange ideas with other members without expecting anything in return. Sooner or later, you too will gain valuable tips and information.
4. Keep at it
Cultivate your contacts and strengthen the connections you make. You can do this both online and in person. To learn how to become an ace at networking, take a look at this article .
Networking with PowerPoint: How to use presentations to make business contacts
No matter what the topic, presentations are all about sharing information with your audience in the most descriptive and interesting way possible. Successful PowerPoint presentations exude competence and inspire confidence. These same qualities are the backbone of effective networking, which is why building contacts after a presentation is a natural next step.
PowerPoint presentations: Connect with genuine prospects
Presentations are an ideal platform to share your information and messages with others.
We’re all inundated with information, 24/7. And that can be overwhelming, to say the least. While email newsletters or Instagram posts are often deleted or ignored completely, an audience makes a conscious decision to listen to a presentation. Those who attend your presentation are genuinely interested in learning more about your topic. What’s more, your audience trusts that you’re competent in your field. Take advantage of this opportunity and win over new business contacts, customers and followers.
6 tips for effective networking and building business contacts with presentations
1. Be yourself
Even though you may think you’re playing your role perfectly, most people know if someone is pretending to be someone they aren’t. Stay true to yourself during your presentation. This is a surefire way of gaining your audience’s confidence and at the same time, laying the foundation for new business contacts.
2. Your presentation should be interesting and relevant to your audience Think about what information you want to share with your audience and how you want to deliver it. It’s important to provide them with facts and information that they’ll find interesting.
Read this article to learn how to use rhetoric and public speaking techniques to deliver an inspiring presentation. Sharing pertinent information with your audience creates confidence and provides a solid basis for networking.
3. Use the right body language
Even the most interesting information will be less than convincing if it’s not presented in the right way. Your body language not only communicates confidence and poise, but also supports your content. Needless to say, body language plays a decisive role in successful networking too. In this article , you’ll learn what body language is all about and how you can use it to sell yourself to your audience.
4. Stir your audience’s emotions
Meaningful facts and figures are the core of any presentation. But you need to engage your audience on an emotional level, too. Rouse your audience, inspire confidence and motivate them to improve their professional and/or personal lives. When it comes to networking, you need to connect with potential business partners and customers on a more emotional level. A great way to do this is through storytelling. You’ll find some great tips on storytelling in our blog .
5. Prepare for your presentation
Being nervous is normal. While some people seem to be made for the stage, others find it utterly nerve-wracking to speak in front of an audience. But with the right preparation, you can control your nerves and present confidently.
It’s always a good idea to rehearse your PowerPoint presentation and prepare a mental checklist. Go over your core messages, make sure your slides and equipment are in order and that you’re ready for any questions from your audience.
6. Engage your audience
Networking is all about building rapport and trust with others and a presentation is a great way to lay that foundation. Actively involving your audience in your presentation creates a connection and builds excitement. Interacting with your audience will not only increase their interest, but also creates a personal connection between you and them. Ask your audience for personal stories or give them the chance to answer technical questions.
Networking doesn’t stop – not even after your presentation!
Most presenters are happy when the presentation is over, and the stress of presenting behind them. Nevertheless, it’s still important to continue networking and exchanging ideas with the audience. We’ve put together 10 tips on how to network after your presentation.
1. Be accessible
Don’t rush out after your presentation. Instead, plan some time to talk to your audience. This gives you the opportunity to receive feedback and discuss your topic with them.
2. Set a goal
You may have a goal for your presentation, but you need a goal for networking afterwards. For example, aim to collect at least 10 business cards or speaking to 7 people.
Being a good listener is key to establishing contacts. Your presentation was the time to put your ideas in the spotlight. Once it’s over, let your audience ask questions and listen attentively.
4. Avoid sales pitches
Making contacts is not about selling yourself. It’s more important to exchange ideas and have conversations that can be followed up on later. You’ve already presented your facts and figures; follow-up conversations shouldn’t signal a second round of your presentation.
5. Revisit comments and concerns
If anyone has asked questions or made comments during your presentation, make sure to follow up with those people. Address any concerns and try to come to an understanding before the rest of the audience has left the room.
6. Get feedback…
Seek feedback from your audience and be open to it. Getting face-to-face feedback is a great networking opportunity.
7. … with a questionnaire
If you don’t have time to talk to your audience personally, there are other ways to get their reaction to your presentation. Hand out a questionnaire or send a call-to-action email to get feedback.
8. Set a time limit
Networking can be pretty exhausting. You have to be patient; you may have to put up with criticism or uncomfortable questions. If this seems a bit daunting, it may help to set a time limit.
Allow at least 15 minutes for questions and comments. Providing your audience with additional information in a handout will allow you to moderate and steer the discussion at any time.
9. Keep in touch
If you get someone’s contact information, reach out to them. This is how you continue to share ideas and open up potential business opportunities.
10. Learn from mistakes Maybe your presentation didn’t go perfectly. Take a look at your presentation the day after and make a list of things that did and didn’t go well. Review this list before your next presentation and learn from any mistakes you may have made.
Use your presentation for effective networking!
A presentation gives you the chance to convince an interested audience of your expertise. This lays the foundation to steadily expand your network and build your professional reputation.
If you have any questions about networking or PowerPoint in general, please feel free to contact us at [email protected] . We’d be happy to help you! Looking to build your network at your next presentation? Take a look at our shop . You’ll find everything you need to make your next PowerPoint presentation a success.
Check out our blog for more helpful articles on how to master your presentation and build a strong foundation for networking. here are a few that might interest you:
- Humor in presentations
- PowerPoint Presenter View
- Body language in presentations
- Public speaking skills
- How to end a presentati
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CHAPTER 1 INTRODUCTION NETWORKING
Jan 05, 2020
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CHAPTER 1 INTRODUCTION NETWORKING. WHAT IS A NETWORK?. A network is simply two or more computers that are linked together.
- computer network
- network spanning
- network cont
- personal area networks
- local area network lan
CHAPTER 1INTRODUCTION NETWORKING
WHAT IS A NETWORK? • Anetworkis simply two or more computers that are linked together. • In short, networks, which consist of computers connected together so that they can communicate, enhance both business and personal productivity by enabling users to share resources. • Computer networks allow users to share data and hardware. They also allow people from all over the world to communicate and collaborate in a variety of ways.
A NETWORK FLOW
TYPES OF NETWORKS • The most common types of networks are: • Personal Area Networks (PAN) • Local Area Networks (LANS) and • Metropolitan area network (MAN) • Wide Area Networks (WANS).
Personal Area Networks (PAN) • A personal area network (PAN) is a computer network used for communication among computer devices, including telephones and personal digital assistants, in proximity to an individual's body. • The devices may or may not belong to the person in question. The reach of a PAN is typically a few meters. • PANs can be used for communication among the personal devices themselves (intrapersonal communication), or for connecting to a higher level network and the Internet (an uplink). • Personal area networks may be wired with computer buses such as USB and FireWire. • A wireless personal area network (WPAN) can also be made possible with wireless network technologies such as IrDA, Bluetooth, Wireless USB, Z-Wave and ZigBee.
LOCAL AREA NETWORK • Local Area Network (LAN) – a network that spans a small area such as a building or an office. • Software applications and other resources are stored on a file server. • Print servers enablemultiple users to share the same printer. • Local Area Network (LAN)គឺជា Network ដែលមានទំហំតូចគេច្រើនប្រើក្នុង small to Medium Office ក្នុងផ្ទះ ។ បើសិនជាលើសពី 100 នាក់ឬ Computer លើសពី 100 គ្រឿង ហើយប្រវែងពីចុងម្ខាងនៃ Network ទៅចុងម្ខាងទៀតលើសពី 1000 Feet (ប្រវែង 300m) នោះគេត្រូវត LAN ជាមួយដែលគេហៅ LAN នោះថា internetwork (Network of network) ។
Local Area Network(LAN)
Metropolitan area network(MAN) • A Metropolitan Area Network (MAN) is a network that is utilized across multiple buildings • Commonly used in school campuses or large companies with multiple buildings • Is larger than a LAN, but smaller than a WAN • Is also used to mean the interconnection of several LANs by bridging them together. This sort of network is also referred to as a campus network
Storage Area Network(SAN) • A SAN (Storage Area Network) is a network designed to transfer data from servers to targets, and it is alternative to a directly attached target architecture, where the storage is connected to the servers on general purpose networks • Additional definitions of a SAN imply that the SAN should also be highly performing, and should be such to enable storage devices to communicate with one another and with computer systems
Wide Area Network(WAN). • Wide Area Network (WAN) – a network that spans a wide geographical area; there are several types of WANS • Campus Area Network(CAN) - a network spanning multiple LANs but smaller than a MAN, such as on a university or local business campus. • Storage Area Network(SAN) - connects servers to data storage devices through a technology like Fibre Channel. • Metropolitan Area Network(MAN)- a network spanning a physical area larger than a LAN but smaller than a WAN, such as a city. A MAN is typically owned an operated by a single entity such as a government body or large corporation.
Wide Area Network(WAN).
Wireless LAN • A wireless local area network(LAN) is a flexible data communications system implemented as an extension to, or as an alternative for, a wired LAN. • Using radio frequency (RF) technology, wireless LANs transmit and receive data over the air, minimizing the need for wired connections. • Thus, combining data connectivity with user mobility.
TYPES OF NETWORK (cont) • Intranet – An intranet is a private LAN designed for use by everyone within an organization. An intranet might consist of an internal e-mail system, a message board and one or more Web site portals that contain company news, forms, and personnel information. Access to an intranet’s web site is restricted by afirewall. • Extranet – a network that connects people within your company with people who are outside your company--all within a secure, password-protected network that can be accessed from anywhere.
BENEFITS OF A NETWORK (Advantage) • សារៈប្រយោជន៍នៃប្រពន្ធ័ Network • Information sharing: Authorized users can use other computers on the network to access and share information and data. This could include special group projects, databases, etc. • Hardware sharing: One device connected to a network, such as a printer or scanner, can be shared by many users. • Software sharing: Instead of purchasing and installing a software program on each computer, it can be installed on the server. All of the users can then access the program from a single location. • Collaborative environment: Users can work together on group projects by combining the power and capabilities of diverse equipment.
BENEFITS OF A NETWORK (Advantage) • User ទាំងអស់អាចប្រើ Program និង Data ក្នុងពេលជាមួយគ្នាបានដោយ Program និងData ទាំងនោះត្រូវបានផ្ទុកនៅលើម៉ាស៊ិនមេ( Server). • User អាច Share Peripherals ដូចជា Printer និងឧបករណ៍ប្រើប្រាស់ផ្សេងៗគ្នា ដោយមិនចាំបាច់ចំណយថវិកាទិញឧបករណ៍ទាំងនេះច្រើនសំរាប់ User នីមួយៗទេ។ • ធ្វើរអោយយើងចំណេញពេលវេលាសំរាប់ Back Upឯកសាររបស់យើង។ • វាផ្តល់សិទ្ធ និងសុវត្តិភាពក្នុងការ ការពារទិន្នន័យរបស់យើង វាអាចបែងចែក សិទ្ធទៅអោយ Userនីមួយៗ ទៅតាមការងាររបស់គេម្នាក់ៗ • User អាចផ្ញើរ Electronic Mail (E-mail)ទៅកាន់ User ផ្សេងៗទៀតបានក្នុងគោល បំណងទទួលនិងផ្លាស់ប្តូរពត័មាន បានយ៉ាងឆាប់រហ័ស និងបានរយៈចំងាយឆ្ងាយ។
RISKS OF NETWORK COMPUTING(Disadvantage) • The security of a computer network is challenged everyday by: • Equipment malfunctions • System failures • Note: equipment malfunctions and system failures may be caused by natural disasters such as floods, storms, or fires, and electrical disturbances • Computer hackers • Virus attacks
Network Terms • Client is a piece of computer hardware or software that accesses a service made available by a server, in which case the client accesses the service by way of a network. The term applies to programs or devices that are part of a client–server model. • Server is a computer that stores and provides resources, data, and services to the network.
Term Network (cont)
HOW ARE NETWORKS CATEGORIZED? • Networks are usually classified using three properties: • Topology • Protocol • Architecture
NETWORK/COMMUNICATION PROTOCOLS • បើយើងមាន Hardware ដូចជា Network Medium Connector, NIC និង Computer ក៏ Network របស់យើងមិនទាន់ដំណើរការ មកដែរ ។ Device របស់ Network អាច Communicate ស្គាល់ គ្នាបាន លុះត្រាតែមានប្រើ Network Protocol ដូចគ្នា ។ • Protocol គឺជា Rule ដែលកំនត់ថា តើត្រូវបកប្រែ Signal យ៉ាង ដូចម្តេច តើត្រូវសំគាល់ខ្លួនឯងនិង អ្នកដទៃតាមវិធីណា តើ ត្រូវចាប់ផ្តើមនិងបញ្ចប់ Communication ដូចម្តេច ហើយត្រូវ Manage ការ Exchange data យ៉ាងណា ។
NETWORK/COMMUNICATION PROTOCOLS • A protocol is simply an agreed-on set of rules and procedures for transmitting data between two or more devices. • Features determined by the protocol are: • How the sending device indicates it has finished sending the message. • How the receiving device indicates it has received the message. • The type of error checking to be used.
NETWORK/COMMUNICATIONS PROTOCOLS • Most networks use Ethernet, but some network may use IBM’s Token Ring protocol. • On the Internet, the major protocol is TCP/IP (an acronym for Transmission Control Protocol/Internet Protocol).
COMMUNICATION PROTOCOLS • File transfer protocol (FTP)– used to transmit files. • Simple mail transfer protocol (SMTP)– used to transmit e-mail messages. • Post office protocol (POP)– allows the recipient to retrieve messages. • Wireless application protocol– enables wireless devices to access and use the Internet using a client/server network. • 802.11 – protocolfor wireless LAN technology
COMMUNICATIONS SOFTWARE • E-Mail Software– used to send and receive electronic messages using the Internet • Web Browser– allows users to access and view Web pages • Groupware – allows groups of people on a network to share information and to collaborate on various projects
Network Service • ពាក្យ Network Service មានន័យធម្មតាដូចពាក្យ Service ដែរ ។ យើងប្រហែលជាធ្លាប់បានដឹងថា Network Operating System មួយនោះអាចផ្តល់ File and Print និង Protocol មួយនេះអាចផ្តល់ E-mail ឬ Internet service ជាដើម ។
NETWORK ARCHITECTURE • Network architecture – refers to the way a network is designed and built. The two major types are: • Peer-to-peer architecture – Computers connect with each other in a workgroup to share files, printers, and Internet access. This is used to connect a small number of computers. • Client/server architecture – sends information from a client computer to a server, which then relays the information back to the client computer, or to other computers on the network
Peer-to-Peer Network • ដែលហៅថា Peer-to-Peer Network គឺជាប្រពន្ធ័Network មួយដែលសមាជិកទាំងអស់មានសិទ្ធស្មើរគ្នានៅក្នុងការ Share File, Folder, Printer,Scanner,……។ មានន័យថាអ្នក ណាក៍មានសិទ្ធដើម្បីគ្រប់គ្រងទៅលើ Resource ដែរព្រោះវា អត់មានServer និងClient ច្បាស់លាស់។ .តែវាអាចដើរតួធ្វើជាServer នៅពេលវាផ្តល់នៅservice ទៅអោយគេ។ហើយដើរតួជាClient នៅពេលវាដែលគេស្នើរFiles or Resource ពីគេនៅក្នុងប្រពន្ធ័Network ។
Peer-to-Peer Network (con) • គុណសម្បត្តិ Peer-to-Peer • អាចShare Resource រឺDevice អោយប្រើរួមគ្នា។ • ងាយស្រួយក្នុងការដំឡើងនិងConfigure • Computer នីមួយៗមានលក្ខណៈឯករាជ្យ • មានតំលៃសមរម្យងាយស្រួលពិនិត្យ • មិនត្រូវការអ្នកIT Administrator • គុណវិបត្តិ Peer-to-Peer • គ្មានSecurity នៅលើប្រពន្ធ័Network ។ • គ្មានការគ្រប់គ្រងទៅលើ Data។ • Computer នីមួយៗត្រូវតែថែរក្សានិងBackup ដោយខ្លួនឯង។
Client/Server Network • ជាប្រពន្ធ័Network ដែលមាន PC Server ជាអ្នកគ្រប់គ្រងទៅលើប្រពន្ធ័Network ទាំងមូលនិងផ្តល់នូវសេវាកម្ម(Service )ទៅដល់អ្នកប្រើ(User) ទាំងអស់។ • គ្រប់ Workstation ទាំងអស់ជាអ្នកប្រើប្រាស់ Resource ដែលផ្តល់ ដោយ Server ។ • Client មានតួរនាទីជាអ្នកប្រើ Resource ដែលផ្ទុកនៅលើ Server។ • នៅនៅពេលដែល Client បញ្ជូន Data ទៅរក្សាទុកនៅក្នុង Server ហើយ Server ក៍មានតួនាទីកំណត់សិទ្ធិត្រួតពិនិត្យនូវរាល់ការ Access ក៍ដូចជាការឆ្លើយតបត្រលប់ពី Server ទៅកាន់ Client វិញផងដែរ។
Advantage and Disadvantage of Client/Server • គុណសម្បត្តិ • Network មានលក្ខណៈធំទូលាយ • User អាចប្រើResource បានទាំងអស់គ្នាដែលនៅលើServer ទៅតាមសិទ្ធរាងខ្លួន។ • Network មានSecurity ខ្ពស់នៅពេលចង់ប្រើប្រាស់ត្រូវការUsername and Password • BackupData ជាប្រចាំទៅតាមកាលវិភាគដែលបានកំនត់ • ងាយស្រួលគ្រប់គ្រង • គុណវិបត្តិ • នៅបែលដែលServer Down វាមិនអាចដំណើរការResource បាន • កាConfigure មានលក្ខណៈស្មុគស្មាញ • ត្រុវការចំណាយលុយច្រើនសំរាប់ការបង្កើតដំបូង
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