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CCNA RS_NB - Chapter 1
1.
Chapter 1: Exploring
the Network Network Basics © 2008 Cisco Systems, Inc. All Presentation_ID rights reserved. Cisco Confidential 1
2.
Chapter 1: Objectives
Students will be able to: Explain how networks affect the way we communicate, collaborate, and share. Explain the basic characteristics of a network that supports communication in a small to medium-sized business. Explain the topologies and devices used in a small to medium-sized business network. Explain trends in networking that will affect the use of networks in small to medium-sized business. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 2
3.
Chapter 1 1.1
Communicating in a Network-Centric World 1.2 The Network as a Platform 1.3 LANs, WANs, and Internets 1.4 Expanding the Networking 1.5 Summary Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 3
4.
Interconnecting our Lives
Networks in Our Past and Daily Lives Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 4
5.
Interconnecting our Lives
The Global Community Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 5
6.
Interconnecting our Lives
Networking impacts in our daily lives Networks Support the Way We Communicate Networks Support the Way We Learn Networks Support the Way We Work Networks Support the Way We Play Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 6
7.
Supporting Communication What
is Communication? Establishing the Rules An identified sender and receiver Agreed upon method of communicating (face-to-face, telephone, letter, photograph) Common language and grammar Speed and timing of delivery Confirmation or acknowledgement requirements Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 7
8.
Supporting Communication Quality
of Communication External factors affecting the success of communication include: The quality of the pathway between the sender and the recipient The number of times the message has to change form The number of times the message has to be redirected or readdressed The number of other messages being transmitted simultaneously on the communication network The amount of time allotted for successful communication Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 8
9.
Supporting Communication Internal
QoS Factors Internal factors affecting successful communication across the network include: The size of the message The complexity of the message The importance of the message Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 9
10.
Converged Networks Traditional
Service Networks Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 10
11.
Converged Networks Planning
for the Future Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 11
12.
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 12
13.
Reliable Network Fault
Tolerance in Circuit Switched Network Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 13
14.
Reliable Network Packet-Switched
Networks Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 14
15.
Reliable Network Scalability
Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 15
16.
Reliable Network Quality
of Service (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 16
17.
Reliable Network Network
Security Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 17
18.
LANs, WANs, and
Internets Components of a Network There are three categories of network components: End devices Intermediary devices Network media Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 18
19.
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 smartphones, tablets, PDAs, and wireless debit / credit card readers and barcode scanners) Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 19
20.
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 20
21.
Components of a
Network Network Media Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 21
22.
Components of a
Network Network Topology Diagrams Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 22
23.
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 23
24.
LANs and WANs
Local Area Networks (LAN) Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 24
25.
LANs and WANs
Wide Area Networks (WAN) Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 25
26.
LANs, WANs, and
Internets The Internet Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 26
27.
The Internet Intranet
and Extranet Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 27
28.
LANs, WANs, and
Internets Internet Access Technologies Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 28
29.
Connecting to the
Internet Connecting Remote Users to the Internet Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 29
30.
Connecting to the
Internet Connecting Businesses to the Internet Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 30
31.
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 31
32.
Network Trends Bring
Your Own Device (BYOD) Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 32
33.
Network Trends BYOD
Considerations Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 33
34.
Network Trends Online
Collaboration and Considerations Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 34
35.
Network Trends Video
Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 35
36.
Network Trends Cloud
Computing There are four primary types of clouds: Public clouds Private clouds Custom clouds Hybrid clouds Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 36
37.
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 37
38.
Future of Networking
Network Security Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 38
39.
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 39
40.
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 40
41.
Network Architectures Cisco
Network Architectures Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 41
42.
Network Architectures Cisco
Borderless Network Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 42
43.
Network Architectures Collaboration
Architecture Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 43
44.
Network Architectures Data
Center Architecture Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 44
45.
Network Architectures Cisco
Certified Network Associate (CCNA) Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 45
46.
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 46
47.
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 47
48.
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 48
49.
Presentation_ID © 2008
Cisco Systems, Inc. All rights reserved. Cisco Confidential 49