CCNA Routing and Switching Introduction to Networks v6.0

1.1 Globally Connected

Networking Today

Network has no boundary and supports the way we:

• Learn
• Communicate
• Work
• Play

Providing Resources in a Network

• Small Home / Office Networks
• Medium to Large Networks
• World Wide Network

1.2 LANs, WANs, and the Internet

LANs, WANs, and the Internet Network Components

1. End Devices
   • Either the source or destination of a message
   • Name some end devices
2. Intermediary Network Devices
   • Connect multiple individual networks to form an internetwork
   • Connect the individual end devices to the network
   • Ensure data flows across the network
   • Provide connectivity
3. Network Media
   • Provide the pathway for data transmission
   • Interconnect devices
   • Name the three types of media

LANs, WANs, and the Internet Network Components

1. 1. Network Representations

What do the symbols represent?

1. Topology Diagrams
   • Physical
   • Logical

LANs, WANs, and the Internet LANs and WANs

1. 1. Local Area Networks

Spans across small geographical area
Interconnects end devices
Administrated by a single organization
Provide high speed bandwidth to internal devices

1. 1. WAN Area Networks

Interconnects LAN
Administrated by multiple service providers
Provide slower speed links between LANS

1. Can you name more network types?

LANs, WANs, and the Internet The Internet, Intranets, and Extranets

1. The Internet
   • Worldwide collection of interconnected networks
   • Not owned by any individual or group
2. Intranets and Extranets

LANs, WANs, and the Internet Internet Connections

1. Internet Access Technologies
   • Internet Service Provider (ISP)
   • Broadband cable
   • Broadband Digital Subscriber Line (DSL)
   • Wireless WANs
   • Mobile Services
   • Business DSL
   • Leased Lines
   • Metro Ethernet
2. Types of Internet Connections
   • Home and Small Office
   • Business

1.3 The Network as a Platform 

The Network as a Platform Converged Networks

1. 1. Traditional Separate Networks

Each network with its own rules and

1. 1. The Converging Network

Capable of delivering data, voice, and video over the same network infrastructure

The Network as a Platform Reliable Network

Four Basic Characteristics of Network Architecture

1. Fault Tolerance
2. Scalability
3. Quality of Service (QoS)
4. Security

1.4 The Changing Network Environment

The Changing Network Environment Network Trends

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Top trends include:

• Bring Your Own Device (BYOB)
• Online Collaboration
• Video Communications
• Cloud Computing

The Changing Network Environment Networking Technologies for the Home

1. 1. Technology Trends in the Home 

Smart home

1. 1. Powerline Networking

Uses existing electrical wiring to connect devices

1. Wireless Broadband 
   • Wireless Internet Service Provider (WISP)
   • Wireless Broadband Service using cellular technology

The Changing Network Environment Network Security

1. Security Threats
   • 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
2. Security Solutions 
   • Antivirus and antispyware
   • Firewall filtering
   • Dedicated firewall systems
   • Access control lists (ACL)
   • Intrusion prevention systems (IPS)
   • Virtual Private Networks (VPNs)

The Changing Network Environment Network Architecture

1. 1. Cisco Network Architecture
      • Support technologies and applications
      • Ensure connectivity across any combination of networks
   2. CCNA

A first step to a networking career

1.5 Chapter Summary

Chapter Summary Summary

1. Explain how multiple networks are used in everyday life.
2. Describe the topologies and devices used in a small to medium-sized business network.
3. Explain the basic characteristics of a network that supports communication in a small to medium-sized business.
4. Explain trends in networking that will affect the use of networks in small to medium-sized businesses.

Section 1.1 New Terms and Commands

1. client
2. collaborative learning spaces
3. global communities
4. human network
5. network collaboration services
6. network of networks
7. peer-to-peer network
8. server

Section 1.2 New Terms and Commands

Section 1.3 New Terms and Commands

Section 1.4 New Terms and Commands