Physical Layer

What is CCNA?

CCNA (Cisco Certified Network Associate) is a popular certification course for networking by Cisco Systems. The CCNA certification is designed to test the candidate’s knowledge and skills required to install, configure, operate, and troubleshoot medium-size enterprise branch networks. CCNA certification course includes various domains such as the basics of networking, network security, network infrastructure, and network automation....

Computer Networking – Introduction

What is a Network? Local Area Network (LAN) OSI & TCP/IP Models TCP/IP Suite of Protocols Encapsulation...

Computer Networking – Components

NIC Explanation Switch Explanation Hub Explanation Router Explanation Cable Explanation...

Transport Layer

Transport Layer Explanation Ports  TCP  TCP Three-Way Handshake UDP...

Network Layer

IP Header Unicast, Multicast, and Broadcast Addresses Types of IP Addresses...

IPv4 Addressing

Ipv4 Address Explanation Converting IP Address – Decimal to Binary Subnet Mask Classes of IP Addresses...

Subnetting

Subnetting  CIDR (Classless Inter-Domain Routing) Create Subnets Variable Length Subnet Masks (VLSM) Private IP Addresses...

Data Link Layer

Ethernet  Ethernet Frame MAC & IP Address...

Physical Layer

Types of Ethernet Cabling IEEE Ethernet Standards Cisco PoE Explained...

Cisco Networking Devices

Network Devices Network Hubs  Network Switch CSMA/CD Collision & Broadcast Domain Layer 2 Switching Network Router What Is Layer 3 Switch and How it Works in Our Network?...

Life of a Packet

What is the Domain Name System (DNS) and How Does it Work? Map Hostnames to IP Addresses How to Configure a Cisco Router as a DNS Server? no ip domain-lookup Command ARP (Address Resolution Protocol) Explained ARP Table on a Cisco Router...

Router and Switch Basic Configuration

IOS Basic Commands Configure an IP Address on a Switch Interface Range Command Power on a Cisco Device Half Duplex and Full Duplex Configure Speed and Duplex Link Layer Discovery Protocol (LLDP) Cisco Discovery Protocol (CDP) overview Interface Status Codes...

Cisco Device Management

Types of Memory on a Cisco Device Router IOS Boot Sequence How to Reset a Cisco Router or Switch to Factory Default IOS files Backing up IOS Configuration FTP & TFTP Copy Files with FTP How to Upgrade Cisco IOS Erasing Configuration Files...

Basic Network Troubleshooting

Network Troubleshooting Methodology and Techniques ICMP (Internet Control Message Protocol) Ping Explained Traceroute Command Lead Process Command...

IPv4 Routing

What is IP Routing? Routing Table Connected, Static, & Dynamic Routes Floating Static Route – Explanation and Configuration Default Static Route Create a Static Host Route What is a Static Summary Route?...

Dynamic Routing Protocols

Routing Protocols Comparing Internal Routing Protocols (IGPs) Administrative Distance & Metric Equal Cost Multi-Path (ECMP) Explanation & Configuration Understanding Loopback Interfaces and Loopback Addresses Passive-Interface Command...

Interior Gateway Protocols

RIP Overview Advertise Default Routes Using RIP Configuring RIPv2 EIGRP Overview EIGRP Diffusing Update Algorithm (DUAL) EIGRP Reliable Transport Protocol (RTP) Wildcard Masks Wildcard Mask in EIGRP EIGRP Automatic & Manual Summarization EIGRP Summary...

Open Shortest Path First (OSPF)

OSPF Overview Differences Between OSPF and EIGRP Cisco Bandwidth Command vs Clock Rate and Speed Commands OSPF Cost – OSPF Routing Protocol Metrics Explained OSPF Configuration Designated & Backup Designated Router OSPF Passive Interface – Configuration and Why it is Used OSPF Default-Information Originate and the Default Route OSPF Load Balancing – Explanation and Configuration OSPF Summarization Configuring OSPF Network Types in Cisco...

Virtual Local Area Network (VLAN)

Cisco Three-Layer Hierarchical Model Collapsed Core and Three-Tier Network Architectures What is Spine and Leaf Network Architecture? What is a VLAN? Frame Tagging Configuring VLANs Access and Trunk Ports Inter-Switch Link (ISL) IEEE 802.1Q Configuring Access & Trunk Ports Configuring Voice VLANs Configuring Allowed VLANs Cisco Dynamic Trunking Protocol (DTP) Explained What is VTP? VTP Modes VTP Configuration...

Inter-VLAN Routing

Configure Inter-VLAN Routing Configure Cisco ROAS Router On A Stick Cisco Layer 3 Switch Inter-VLAN Routing Configuration...

Dynamic Host Control Protocol (DHCP)

DHCP & DNS Configure Cisco Router as DHCP Server DHCP Relay Agent Configure Cisco Router as a DHCP Client APIPA (Automatic Private IP Addressing)...

Hot Standby Routing Protocol (HSRP)

What is Network Redundancy and What are its Benefits? Cisco First Hop Redundancy Protocol (FHRP) Explained Cisco Hot Standby Router Protocol (HSRP) Explained Cisco Hot Standby Router Protocol (HSRP) Configuration Cisco Hot Standby Router Protocol (HSRP) Preempt Command...

Spanning Tree Protocol (STP)

What is STP? Network Bridge Explained How STP Works Electing the Root Switch in STP Spanning Tree Priority: Root Primary and Root Secondary Select STP Root Port Selected STP Designated Port (DP) Spanning Tree Modes: MSTP, PVST+, and RPVST+ What is RSTP? How RSTP Works Configuring RSTP Cisco HSRP and Spanning Tree Alignment Configuration Spanning Tree Portfast, BPDU Guard, Root Guard Configuration...

Ethernet Channel

What is EtherChannel and Why Do We Need It? EtheChannel Port Aggregation Protocol (PAgP) EtherChannel Link Aggregation Control Protocol (LACP) Multichassis EtherChannel (MEC) and MEC Options Cisco Layer 3 EtherChannel – Explanation and Configuration...

Switch Security

What is DHCP Snooping? – Explanation and Configuration Dynamic ARP Inspection (DAI) Explanation & Configuration What is 802.1X Authentication and How it Works? Port Security Cisco Port Security Violation Modes Configuration...

Access Control List (ACL)

What are ACLs? Types of ACLs Configuring Standard ACLs Configuring Extended ACLs Configuring Named ACLs...

Network Address Translation (NAT)

What is NAT? Static NAT Dynamic NAT Port Address Translation (PAT) Configuration...

IPv6 Addressing and Routing

What is IPv6? IPv6 Address Format IPv6 Interface Identifier Differences Between IPv4 and IPv6 Types of IPv6 Addresses IPv6 Unicast Addresses IPv6 Global Unicast Addresses IPv6 Unique Local Addresses IPv6 Link-Local Addresses IPv6 Multicast Addresses IPv6 Address Prefixes How to Configure IPv6 IPv6 SLAAC – Stateless Address Autoconfiguration IPv6 Routing – Static Routes Explained and Configured IPv6 Default Static Route and Summary Route IPv6 Routing Protocols Neighbor Discovery Protocol – NDP Overview...

Wide Area Network

Wide Area Network What is VPN (Virtual Private Network)? WAN Connection Types – Explanation and Examples Leased Line Definition, Explanation, and Example Multiprotocol Label Switching (MPLS) Explained & Configured What is PPPoE? Point-to-Point Protocol over Ethernet. Different Wide Area Networks (WAN) Topologies...

Security Concepts

Cybersecurity Threats and Common Attacks Explained The Different Types of Firewalls Explained Firewalls, IDS, and IPS Explanation and Comparison Symmetric vs Asymmetric Encryption HTTP and HTTPS explained Cyber Threats Attack Mitigation and Prevention...

Network Device Security

Telnet & SSH Setting Up Telnet Setting Up SSH Cisco Console Port Security exec-timeout Command Encrypt Local Usernames and Passwords Cisco Privilege Levels – Explanation and Configuration What is AAA? Authentication, Authorization, & Accounting Configuring AAA on Cisco Devices – RADIUS and TACACS+ Configuring a Cisco Banner: MOTD, Login, & Exec Banners Configure Timezone and Daylight Saving Time (DST) NTP (Network Time Protocol) Configure NTP on a Cisco Router...

Network Device Management

Syslog Explained Syslog Message Format Cisco IOS Syslog Logging Locations logging synchronous Command Debug Command Terminal Monitoring Command SNMP (Simple Network Management Protocol) SNMPv3 Overview and Configuration...

Wireless Networking

What is Wireless Network and What are its Types? Wireless Access Point Operation Explained Autonomous AP Access Point Configuration Lightweight Access Point (AP) Configuration Cisco Wireless Architecture Overview and Examples Cisco Wireless LAN Controller Deployment Models 2.4 GHz vs 5 GHz Wi-Fi Frequency Spectrum Understanding Wi-Fi Security – WEP, WPA, WPA2, and WPA3....

Job Opportunities after CCNA Certification

A few of the Cisco CCNA certification edges are as below:...

FAQs on CCNA Tutorial

Q1. What is CCNA?...