Course Content
Networking Today
0/7
Network Components
Network Representations and Topologies
Common Types of Networks
Internet Connections
Reliable Networks
Network Security Basic
Network Trends
Basic Switch and End Device Configuration
0/7
Cisco IOS Access
Cisco IOS Navigation
Cisco IOS Command Structure
Basic Cisco Device Configuration
Save Cisco IOS Configurations
Ports and Addresses
Configure IP Addressing
Protocols and Models
0/7
The Rules in Network Communications
Protocols
Protocol Suites
Standards Organizations
Reference Models
Data Encapsulation
Data Access
Physical Layer
0/6
Purpose of the Physical Layer
Physical Layer Characteristics
Copper Cabling
UTP Cabling
Fiber-Optic Cabling
Wireless Media
Data Link Layer
0/3
Purpose of the Data Link Layer
WAN and LAN topologies
Data Link Frame
Ethernet Switching
0/4
Ethernet Frames
Ethernet MAC Address
The MAC Address Table
Switch Speeds and Forwarding Methods
Network Layer
0/5
Network Layer Characteristics
IPv4 Packet
IPv6 Packet
How a Host Routes
Router Routing Tables
Number Systems
0/2
Binary Number System
Hexadecimal Number System
Address Resolution
Explain how ARP and ND enable communication on a network
0/3
MAC and IP
ARP
Neighbor Discovery
Basic Router Configuration
0/3
Configure Initial Router Settings
Configure Interfaces
Configure the Default Gateway
IPv4 Addressing
0/7
IPv4 Address Structure
IPv4 Unicast, Broadcast, and Multicast
Types of IPv4 Addresses
Network Segmentation
Subnet an IPv4 Network
VLSM
Structured Design
IPv6 Addressing
0/8
IPv4 Issues
IPv6 Address Representation
IPv6 Address Types
GUA and LLA Static Configuration
Dynamic Addressing for IPv6 GUAs
Dynamic Addressing for IPv6 LLAs
IPv6 Multicast Addresses
Subnet an IPv6 Network
ICMP
0/2
ICMP Messages
Ping and Traceroute Testing
Transport Layer
0/7
Transportation of Data
TCP Overview
UDP Overview
Port Numbers
TCP Communication Process
Reliability and Flow Control
UDP Communication
Application Layer
0/7
Application, Presentation, and Session
Peer-to-Peer
Web Protocols
Email Protocols
Dynamic Host Configuration Protocol (DHCP)
Domain Name Service
File Sharing Services
Network Security Fundamentals
0/4
Security Threats and Vulnerabilities
Network Attacks
Network Attack Mitigation
Device Security
Build a Small Network
0/7
Devices in a Small Network
Small Network Applications and Protocols
Scale to Larger Networks
Verify Connectivity
Host and IOS Commands
Troubleshooting Methodologies
Troubleshooting Scenarios
Basic Device Configuration
0/5
Configure a Switch with Initial Settings
Configure Switch Ports
Secure Remote Access
Basic Router Configuration
Verify Directly Connected Networks
CCNA: Switching, Routing, and Wireless Essentials
The second course in the CCNA curriculum focuses on switching technologies and router operations that support small-to-medium business networks and includes wireless local area networks (WLAN) and security concepts.
0/15
Switching Concepts
VLANs
Inter-VLAN Routing
STP
Etherchannel
DHCPv4
SLAAC and DHCPv6 Concepts
FHRP Concepts
LAN Security Concepts
Switch Security Configuration
WLAN Concepts
WLAN Configuration
Routing Concepts
IP Static Routing
Troubleshoot Static and Default Routes
CCNA: Enterprise Networking, Security, and Automation
The third CCNA course describes the architectures and considerations related to designing, securing, operating, and troubleshooting enterprise networks – including wide area network (WAN) technologies & quality of service (QoS) mechanisms for secure remote access, along with software-defined networking, virtualization, & automation concepts supporting network digitization.
0/14
Single-Area OSPFv2 Concepts
Single-Area OSPFv2 Configuration
Network Security Concepts
ACLs Concepts
ACLS for IPv4 Configuration
NAT for IPv4
WAN Concepts
VPN and IPsec Concepts
QoS Concepts
Network Management
Network Design
Network Troubleshooting
Network Virtualization
Network Automation
CCNA Course
About Lesson

Cisco IOS Access

Explain how to access a Cisco IOS device for configuration purposes.

Cisco IOS is an operating system for Cisco routers and network devices

Operating Systems

Operating Systems includes

  • Shell – The user interface that allows users to request specific tasks from the computer. These requests can be made either through the CLI or GUI interfaces.
  • Kernel – Communicates between the hardware and software of a computer and manages how hardware resources are used to meet software requirements.
  • Hardware – The physical part of a computer including underlying electronics.

GUI

  • A GUI allows the user to interact with the system using an environment of graphical icons, menus, and windows.
  • A GUI is more user-friendly and requires less knowledge of the underlying command structure that controls the system.
  • Examples of these are: Windows, macOS, Linux KDE, Apple iOS and Android.
  • GUIs can fail, crash, or simply not operate as specified. For these reasons, network devices are typically accessed through a CLI.

Purpose of an OS

PC operating system enables a user to do the following:

  • Use a mouse to make selections and run programs
  • Enter text and text-based commands
  • View output on a monitor

CLI-based network operating system enables a network technician to do the following:

  • Use a keyboard to run CLI-based network programs
  • Use a keyboard to enter text and text-based commands
  • View output on a monitor

Access Methods to Cisco Devices

  • Console – A physical management port used to access a device in order to provide maintenance, such as performing the initial configurations.

 

  • Secure Shell (SSH) – Establishes a secure remote CLI connection to a device, through a virtual interface, over a network. (Note: This is the recommended method for remotely connecting to a device.)

  • Telnet – Establishes an insecure remote CLI connection to a device over the network. (Note: User authentication, passwords and commands are sent over the network in plaintext.)

Terminal Emulation Programs

  • Terminal emulation programs are used to connect to a network device by either a console port or by an SSH/Telnet connection.
  • There are several terminal emulation programs to chose from such as PuTTY, Tera Term and SecureCRT.

 

Other related topics

 

Topic Title Topic Objective
Cisco IOS Access Explain how to access a Cisco IOS device for configuration purposes.
Cisco IOS Navigation Explain how to navigate Cisco IOS to configure network devices.
Cisco IOS Command Structure Describe the command structure of Cisco IOS software.
Basic Cisco Device Configuration Configure a Cisco IOS device using CLI.
Save Cisco IOS Configurations Use IOS commands to save the running configuration.
Ports and Addresses Explain how devices communicate across network media.
Configure IP Addressing Configure a host device with an IP address.

Other useful information

 

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