CCNA Introduction to Network Routing and Switching

CCNA Introduction to Network Routing and Switching

This the first part of CCNA Training Course, which is regarding the CCNA (Part 1), Introduction to Network & Introduction to Cisco Routing and Switching.

CCNA Part 1 Course Content

As the title of this post show that part will focus on the basics of networks . You will learn the practical and conceptual skills that form the basis for understanding the basics of networks. In this part:

  • We will compare human communication with network communication and observe the similarities between them.
  • An introduction to the two main models for planning and implementing networks: OSI and TCP / IP.
  • You will get understanding of the network layers approach.
  • Working of OSI and TCP / IP layers in detail to understand their functions and services.
  • You will become familiar with the various network devices and network address assignment schemes.
  • Introduction to different types of media used to transport data across the network.

By the end of the course, you will be able to build simple LAN networks, perform basic configurations for routers and switches and implement IP addressing schemes.

CHAPTER 1: NETWORK SCANNING - CCNA 1

This chapter provide and introduction to data network platform on which our social and commercial communication depend. We will explore the services, technologies and problems that network professionals face while designing, developing and maintaining the modern network. Key concepts are as under:

CHAPTER 2: Introduction and Configuration Of Network Operating System - CCNA 1


All computers and network devices ncluding PC-based , such as switches, routers, access points and firewalls require a program to function. These network devices use an software known as a network operating system. A network operating system enables the device hardware to work and provides an interface for users to interact. In the CCNA course, students learn to configure the two devices that connect to the network (terminals such as PCs) and devices that connect networks to each other (intermediary devices such as routers and switches). Learning to configure the Cisco Internetwork operating system (Cisco IOS) on Cisco routers and switches is a large part of the Cisco CCNA study program.
The Cisco Internetwork Operating System (IOS) is a generic term for the collection of network operating systems that are used in Cisco network devices. Cisco IOS is used on most Cisco devices, regardless of the size or type of device. Following topics are covered related to Network Operating System.


CHAPTER 3: Network Protocols and Communications - CCNA 1

Instead of creating exclusive and independent systems for the provision of each new service, the entire network sector adopted a development framework that allows designers to understand current network platforms and maintain them. At the same time, this framework is used to facilitate the development of new technologies, in order to meet the needs of future communications and technological improvements. A fundamental aspect of this development framework is the use of generally accepted models that describe network rules and functions.
In this chapter, you will get information about these models, about the standards that make networks work, and about how communication occurs through a network.


CHAPTER 4: ACCESS TO THE NETWORK - CCNA 1

To support our communications, the OSI model divides the functions of a layered data network. Each layer works with the upper and lower layers to transmit data. Two layers within the OSI model are so related that, according to the TCP / IP model, they are basically one. Those two layers are the data link layer and the physical layer.
In the sending device, the function of the data link layer is to prepare the data for transmission and control how they access the physical media. However, the physical layer controls how the data is transmitted to the physical media by signal encoding the binary digits that represent the data.
At the receiving end, the physical layer receives signals through the connection means. After decoding the signal and converting it back into data, the physical layer transmits the frame to the data link layer for acceptance and processing.
In this chapter, we begin with the general functions of the physical layer and the standards and protocols that manage the transmission of data through local media. The functions of the data link layer and the protocols associated with it are also presented.


CHAPTER 5: ETHERNET - CCNA 1

The physical layer provides the means to transport the bits that make up a data link layer frame through the network media.
Ethernet is the predominant LAN technology in the world. Ethernet works in the data link layer and in the physical layer. The Ethernet protocol standards define many aspects of network communication, including format, size, timing and frame coding. When messages are sent between hosts over an Ethernet network, the hosts format the messages according to the frame settings specified by the standards.
Since Ethernet is composed of standards in these lower layers, it can be better understood by referring to the OSI model. The OSI model separates the routing, framing and media access capabilities of the data link layer from the media standards of the physical layer.
In this chapter, the characteristics and operation of Ethernet are analyzed in terms of its evolution from a content-based data communication technology based on contention to becoming the current full-bandwidth full-duplex technology.


CHAPTER 6: NETWORK LAYER - CCNA 1

The network applications and services of one terminal can communicate with the applications and services running in another terminal. How do data communicate on the network effectively?
The network layer protocols of the OSI model specify the addressing and processes that allow data packets on the network layer to be assembled and transported. Network layer encapsulation allows data to be transferred to a destination within a network (or another network) with minimal overhead.
In this chapter, we will focus on the role of the network layer . It examines how to divide networks into host groups to manage the flow of data packets within a network. It also explains how communication between networks is facilitated. This communication between networks is called routing.


CHAPTER 7: IP ADDRESS ASSIGNMENT - CCNA

Addressing is a crucial function of network layer protocols. It allows data communication between hosts, regardless of whether they are on the same network or on different networks. Both the Internet protocol version 4 (IPv4) and the Internet protocol version 6 (IPv6) provide hierarchical addressing for packets that carry data.
The design, implementation and administration of an effective IP address allocation plan ensures that networks can operate effectively and efficiently.
In this chapter, the structure of IP addresses and their application in the construction and testing of IP networks and subnets is examined in detail .


CHAPTER 8: DIVISION OF IP NETWORKS IN SUBNETS - CCNA 1

The design, implementation and administration of an effective IP address allocation 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 modify that hierarchy in order to more efficiently satisfy the routing requirements is an important part of planning an IP address allocation scheme.
In the original IPv4 address, there are two levels of hierarchy: a network and a host. These two levels of addressing allow basic network groupings that facilitate packet routing to a destination network. A router forwards packets based on the network portion of an IP address. Once the network is located, the host portion of the address allows the destination device to be identified.
However, as networks grow and many organizations add hundreds and even thousands of hosts to their network, the two-tier hierarchy becomes insufficient.
The network subdivision adds a level to the network hierarchy, which basically creates three levels: a network, a subnet and a host. The introduction of an additional level to the hierarchy creates additional subgroups within an IP network, which facilitates faster delivery of packets and provides more filtering features by helping to minimize local traffic.
In this chapter, the creation and assignment of network and subnet IP addresses is analyzed in detail by using the subnet mask.


CHAPTER 9: TRANSPORT LAYER - CCNA 1

Data networks and the Internet support the human network through the provision of reliable communication between people. On a single device, users can use various applications and various services, such as email, the web and instant messaging to send messages or obtain information. The data of each of these applications are packaged, transported and delivered to the corresponding application on the destination device.
The processes described in the transport layer of the OSI model accept the data from the application layer and prepare them for addressing at the network layer. A source team communicates with a receiving team to decide how to divide the data into segments, how to ensure that none of the segments are lost, and how to verify if all segments arrive. When considering the transport layer, imagine a shipping department that prepares a single order of several packages to deliver.
The topics covered:


CHAPTER 10: APPLICATION LAYER - CCNA 1

Applications such as web browsers, online games, chat and email with friends allow us to send and receive information with relative ease. In general, we can access these applications and use them without knowing how they work. However, for network professionals, it is important to know how an application can format, transmit and interpret messages that are sent and received through the network.
The visualization of the mechanisms that allow communication through the network is made easier if we use the OSI layered scheme.
In this chapter, we will analyze the function of the application layer and the way in which the applications, services and protocols that are within the application layer make solid communication possible through data networks.


CHAPTER 11: CREATE A SMALL NETWORK - CCNA 1

Up to this point in the course, we have considered the services that a data network can provide to the human network, we have examined the characteristics of each layer of the OSI model and the operations of the TCP / IP protocols and we observe in detail Ethernet, a technology Universal LAN
The next step is to learn how to gather these elements to form a network that works and can be maintained.
The following topics are discussed:


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