+ Giải thích tác động của việc sử dụng mạng trong cuộc sống hằng ngày+ Giải thích Cấu trúc và thiết bị được sử dụng trong mô hình mạng doanh nghiệp vừa và nhỏ.+ Giải thích đặc điểm cơ bản của mạng hổ trợ thông tin liên lạc trong mạng doanh nghiệp vừa và nhỏ.+ giải thích xu hướng trong mạng ảnh hưởng đến việc sử dụng mạng vừa và nhỏ
Chapter 1: Exploring the Network Introduction to Networks Presentation_ID © 2008 Cisco Systems, Inc All rights reserved Cisco Confidential * Chapter 1: Objectives Students will be able to: �Explain how multiple networks are used in everyday life �Explain the topologies and devices used in a small to medium-sized business network �Explain the basic characteristics of a network that supports communication in a small to medium-sized business �Explain trends in networking that will affect the use of networks in small to medium-sized businesses Presentation_ID © 2008 Cisco Systems, Inc All rights reserved Cisco Confidential Chapter 1.1 Globally Connected 1.2 LANs, WANs, and the Internet 1.3 The Network as a Platform 1.4 The Changing Network Environment 1.5 Summary Presentation_ID © 2008 Cisco Systems, Inc All rights reserved Cisco Confidential Networking Today Networks in Our Past and Daily Lives (IoE) Presentation_ID © 2008 Cisco Systems, Inc All rights reserved Cisco Confidential Networking Today The Global Community Global communities allow for social interaction that is independent of location or time zone Presentation_ID © 2008 Cisco Systems, Inc All rights reserved Cisco Confidential Interconnecting our Lives Networking impacts in our daily lives �Networks Support the Way We Learn �Networks Support the Way We Communicate �Networks Support the Way We Work �Networks Support the Way We Play Presentation_ID © 2008 Cisco Systems, Inc All rights reserved Cisco Confidential Interconnecting our Lives Networking impacts in our daily lives � Networks Support the Way We Learn • Support the creation of virtual classrooms • Provide on-demand video • Enable collaborative learning spaces • Enable mobile learning Presentation_ID © 2008 Cisco Systems, Inc All rights reserved Cisco Confidential Interconnecting our Lives Networking impacts in our daily lives � Networks Support the Way We Communicate • Instant Messaging (IM) /Texting – IM and texting both enable instant real-time communication between two or more people • Social Media – Social media consists of interactive websites where people and communities create and share user-generated content with friends, family, peers, and the world • Collaboration Tools - Collaboration tools give people the opportunity to work together on shared documents • Weblogs (blogs) - Weblogs are web pages that are easy to update (blogs) and edit • Wikis - Wikis are web pages that groups of people can edit and view together • Podcasting - Podcasting is an audio-based medium that originally enabled people to record audio and convert it for use Presentation_ID © 2008 Cisco Systems, Inc All rights reserved Cisco Confidential Interconnecting our Lives Networking impacts in our daily lives � Networks Support the Way We Work • In the business world, data networks were initially used by businesses to internally record and manage financial information, customer information, and employee payroll systems • The use of networks to provide efficient and cost-effective employee training is increasing in acceptance (email, video, messaging, and telephony) • Online learning opportunities can decrease time-consuming and costly travel yet still ensure that all employees are adequately trained to perform their jobs in a safe and productive manner Presentation_ID © 2008 Cisco Systems, Inc All rights reserved Cisco Confidential Interconnecting our Lives Networking impacts in our daily lives � Networks Support the Way We Play Presentation_ID © 2008 Cisco Systems, Inc All rights reserved Cisco Confidential 10 Network Trends Video Communication Presentation_ID © 2008 Cisco Systems, Inc All rights reserved Cisco Confidential 50 Network Trends Cloud Computing � Cloud computing is the use of computing resources (hardware and software) that are delivered as a service over a network � The term “cloud computing” really refers to web-based computing � Cloud computing offers the following potential benefits: • Organizational flexibility • Agility and rapid deployment • Reduced cost of infrastructure • Refocus of IT resources • Creation of new business models Presentation_ID © 2008 Cisco Systems, Inc All rights reserved Cisco Confidential 51 Network Trends Data Centers A data center is a facility used to house computer systems and associated components including: �Redundant data communications connections �High-speed virtual servers (sometimes referred to as server farms or server clusters) �Redundant storage systems (typically uses SAN technology) �Redundant or backup power supplies �Environmental controls (e.g., air conditioning, fire suppression) �Security devices Presentation_ID © 2008 Cisco Systems, Inc All rights reserved Cisco Confidential 52 Networking Technologies for the Home Technology Trends in the Home Smart home technology will become more of a reality as home networking and high-speed Internet technology becomes more widespread in homes Presentation_ID © 2008 Cisco Systems, Inc All rights reserved Cisco Confidential 53 Networking Technologies for the Home Powerline Networking HomePlug standard powerline adapter, devices can connect to the LAN wherever there is an electrical outlet Presentation_ID © 2008 Cisco Systems, Inc All rights reserved Cisco Confidential 54 Networking Technologies for the Home Wireless Broadband • Wireless Internet Service Provider (WISP) - an ISP that connects subscribers -> The connection from the home to the ISP is wireless instead of a physical cable • Wireless Broadband Service used to access the Internet with a smart phone or tablet Presentation_ID © 2008 Cisco Systems, Inc All rights reserved Cisco Confidential 55 Future of Networking Network Security Presentation_ID © 2008 Cisco Systems, Inc All rights reserved Cisco Confidential 56 Network Security Security Threats The most common external threats to networks include: �Viruses, worms, and Trojan horses �Spyware and adware �Zero-day attacks, also called zero-hour attacks �Hacker attacks �Denial of service attacks �Data interception and theft �Identity theft Presentation_ID © 2008 Cisco Systems, Inc All rights reserved Cisco Confidential 57 Network Security Security Solutions Network security components often include: �Antivirus and antispyware �Firewall filtering �Dedicated firewall systems �Access control lists (ACL) �Intrusion prevention systems (IPS) �Virtual Private Networks (VPNs) Presentation_ID © 2008 Cisco Systems, Inc All rights reserved Cisco Confidential 58 Network Architectures Cisco Network Architectures Presentation_ID © 2008 Cisco Systems, Inc All rights reserved Cisco Confidential 59 Network Architectures Cisco Certified Network Associate (CCNA) • • • CCNA certification validates an individual’s ability to install, configure, operate, and troubleshoot medium-size route and switched networks, including implementation and verification of connections to remote sites in a WAN CCNA curriculum also includes basic mitigation of security threats, introduction to wireless networking concepts and terminology, and performance-based skills This CCNA curriculum includes the use of various protocols, such as: IP, Open Shortest Path First (OSPF), Serial Line Interface Protocol, Frame Relay, VLANs, Ethernet, access control lists (ACLs) and others Presentation_ID CCNA © 2008 Cisco Systems, Inc All rights reserved Cisco Confidential 60 Exploring the Networking Summary In this chapter, you learned: �Networks and the Internet have changed the way we communicate, learn, work, and even play �Networks come in all sizes They can range from simple networks consisting of two computers, to networks connecting millions of devices �The Internet is the largest network in existence In fact, the term Internet means a ‘network of networks The Internet provides the services that enable us to connect and communicate with our families, friends, work, and interests Presentation_ID © 2008 Cisco Systems, Inc All rights reserved Cisco Confidential 61 Exploring the Networking Summary In this chapter, you learned: �The network infrastructure is the platform that supports the network It provides the stable and reliable channel over which communication can occur It is made up of network components including end devices, intermediate device, and network media �Networks must be reliable �Network security is an integral part of computer networking, regardless of whether the network is limited to a home environment with a single connection to the Internet, or as large as a corporation with thousands of users Presentation_ID © 2008 Cisco Systems, Inc All rights reserved Cisco Confidential 62 Exploring the Networking Summary In this chapter, you learned: �The network infrastructure can vary greatly in terms of size, number of users, and number and types of services that are supported on it The network infrastructure must grow and adjust to support the way the network is used The routing and switching platform is the foundation of any network infrastructure Presentation_ID © 2008 Cisco Systems, Inc All rights reserved Cisco Confidential 63 Presentation_ID © 2008 Cisco Systems, Inc All rights reserved Cisco Confidential 64