CCNA 1 Instructor Materials

11.0 It’s a Network 11.0.1 Introduction 11.0.1.1 Introduction Up to this point in the course, we have considered the services that a data network can provide to the human network, examined the features of each layer of the OSI model and the operations of TCP/IP protocols, and looked in detail …

10.0 Application Layer 10.0.1 Introduction 10.0.1.1 Introduction We experience the Internet through the World Wide Web when streaming videos, playing online games, chatting with and emailing friends, and shopping for deals on web sites. Applications, such as the ones used to provide the services mentioned, provide the human interface to …

9.0 Subnetting IP Networks 9.0.1 Introduction 9.0.1.1 Introduction Designing, implementing and managing an effective IP addressing plan ensures that networks can operate effectively and efficiently. This is especially true as the number of host connections to a network increases. Understanding the hierarchical structure of the IP address and how to …

8.0 IP Addressing 8.0.1 Introduction 8.0.1.1 Introduction Addressing is a key function of network layer protocols that enables data communication between hosts, regardless of whether the hosts are on the same network or on different networks. Both Internet Protocol version 4 (IPv4) and Internet Protocol version 6 (IPv6) provide hierarchical …

7.0 Transportation Layer 7.0.1 Introduction 7.0.1.1 Introduction Data networks and the Internet support the human network by supplying reliable communication between people. On a single device, people can use multiple applications and services such as email, the web, and instant messaging to send messages or retrieve information. Applications such as …

6.0 Network Layer 6.0.1 Introduction 6.0.1.1 Introduction Network applications and services on one end device can communicate with applications and services running on another end device. How is this data communicated across the network in an efficient way? The protocols of the OSI model network layer specify addressing and processes …

5.0 Ethernet 5.0.1 Introduction 5.0.1.1 Introduction The OSI physical layer provides the means to transport the bits that make up a data link layer frame across the network media. Ethernet is now the predominant LAN technology in the world. Ethernet operates in the data link layer and the physical layer. …

4.0 Network Access 4.0.1 Introduction 4.0.1.1 Introduction To support our communication, the OSI model divides the functions of a data network into layers. Each layer works with the layers above and below in order to transmit data. Two layers within the OSI model are so closely tied, that according to …

3.0 Network Protocols and Communications 3.0.1 Introduction 3.0.1.1 Introduction More and more, it is networks that connect us. People communicate online from everywhere. Conversations in classrooms spill into instant message chat sessions, and online debates continue at school. New services are being developed daily to take advantage of the network. …

2.0 Configuring a Network Operating System 2.0.1 Introduction 2.0.1.1 Introduction to Cisco IOS Home networks typically interconnect a wide variety of end devices including PCs, laptops, tablets, smartphones, smart TVs, Digital Living Network Alliance (DLNA) compliant network media players, such as the Xbox 360 or PlayStation 3, and more. All …