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CCNA 1 Routing and Switching v5.0 Chapter 1
1.
Chapter 1: Exploring
the Network Introduction to Networks © 2008 Cisco Systems, Inc. All Presentation_ID rights reserved. Cisco Confidential 1
2.
Chapter 1: Objectives
After completing this chapter, 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 2
3.
Chapter 1 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 3
4.
1.1 Globally Connected
© 2008 Cisco Systems, Inc. All Presentation_ID rights reserved. Cisco Confidential 4
5.
Networking Today Networks
in Our Past and Daily Lives Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 5
6.
Networking Today The
Global Community Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 6
7.
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 7
8.
Providing Resources in
a Network Networks of Many Sizes Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 8
9.
Providing Resources in
a Network Clients and Servers Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 9
10.
Providing Resources in
a Network Peer-to-Peer Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 10
11.
1.2 LANs, WANs,
and the Internet © 2008 Cisco Systems, Inc. All Presentation_ID rights reserved. Cisco Confidential 11
12.
LANs, WANs, and
Internets Components of a Network There are three categories of network components: Devices Media Services Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 12
13.
Components of a
Network End Devices Some examples of end devices are: Computers (work stations, laptops, file servers, web servers) Network printers VoIP phones TelePresence endpoint Security cameras Mobile handheld devices (such as smart phones, tablets, PDAs, and wireless debit / credit card readers and barcode scanners) Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 13
14.
Components of a
Network Network Infrastructure Devices Examples of intermediary network devices are: Network Access Devices (switches, and wireless access points) Internetworking Devices (routers) Security Devices (firewalls) Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 14
15.
Components of a
Network Network Media Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 15
16.
Components of a
Network Network Representations Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 16
17.
Components of a
Network Topology Diagrams Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 17
18.
LANs and WANs
Types of Networks The two most common types of network infrastructures are: Local Area Network (LAN) Wide Area Network (WAN). Other types of networks include: Metropolitan Area Network (MAN) Wireless LAN (WLAN) Storage Area Network (SAN) Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 18
19.
LANs and WANs
Local Area Networks (LAN) Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 19
20.
LANs and WANs
Wide Area Networks (WAN) Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 20
21.
LANs, WANs, and
the Internet The Internet Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 21
22.
LANs, WANs, and
the Internet Intranet and Extranet Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 22
23.
Connecting to the
Internet Connecting Remote Users to the Internet Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 23
24.
Connecting to the
Internet Connecting Businesses to the Internet Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 24
25.
1.3 The Network
as a Platform © 2008 Cisco Systems, Inc. All Presentation_ID rights reserved. Cisco Confidential 25
26.
Converged Networks The
Converging Network Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 26
27.
Converged Networks Planning
for the Future Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 27
28.
Reliable Network Supporting
Network Architecture As networks evolve, we are discovering that there are four basic characteristics that the underlying architectures need to address in order to meet user expectations: Fault Tolerance Scalability Quality of Service (QoS) Security Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 28
29.
Reliable Network Fault
Tolerance in Circuit Switched Network Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 29
30.
Reliable Network Packet-Switched
Networks Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 30
31.
Reliable Network Scalable
Networks Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 31
32.
Reliable Network Providing
QoS Examples of priority decisions for an organization might include: Time-sensitive communication - increase priority for services like telephony or video distribution. Non time-sensitive communication - decrease priority for web page retrieval or email. High importance to organization - increase priority for production control or business transaction data. Undesirable communication - decrease priority or block unwanted activity, like peer-to-peer file sharing or live entertainment. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 32
33.
Reliable Network Providing
Network Security Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 33
34.
1.4 The Changing
Network Environment © 2008 Cisco Systems, Inc. All Presentation_ID rights reserved. Cisco Confidential 34
35.
Network Trends New
trends Some of the top trends include: Bring Your Own Device (BYOD) Online collaboration Video Cloud computing Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 35
36.
Network Trends Bring
Your Own Device (BYOD) The concept of any device, to any content, in anyway is a major global trend that requires significant changes to the way devices are used. This trend is known as Bring Your Own Device (BYOD). Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 36
37.
Network Trends Online
Collaboration Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 37
38.
Network Trends Video
Communication Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 38
39.
Network Trends Cloud
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 39
40.
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 40
41.
Networking Technologies for
the Home Technology Trends in the Home Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 41
42.
Networking Technologies for
the Home Powerline Networking Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 42
43.
Networking Technologies for
the Home Wireless Broadband Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 43
44.
Future of Networking
Network Security Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 44
45.
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 (DoS) attacks Data interception and theft Identity theft Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 45
46.
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 46
47.
Network Architectures Cisco
Network Architectures Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 47
48.
Network Architectures Cisco
Certified Network Associate (CCNA) Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 48
49.
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. 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 devices, and network media. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 49
50.
Exploring the Networking
Summary (cont.) In this chapter, you learned: 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. 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 50
51.
Presentation_ID © 2008
Cisco Systems, Inc. All rights reserved. Cisco Confidential 51
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