Month: August 2019
What is Administrative Distance – Explain
In network environments, routers often receive multiple routes to the same destination from different sources, such as routing protocols (e.g., OSPF, EIGRP, RIP), static routes, or directly connected networks. To select the most trustworthy route, Cisco routers use Administrative Distance (AD), a critical concept in the Cisco Certified Network Associate (CCNA) curriculum. This article explains AD’s...
What is Network Load Balancing
Routers use administrative distance (AD) to prioritize routes learned from different routing protocols when multiple paths to a destination exist. AD is a value assigned to each routing protocol, with lower values indicating higher preference (e.g., EIGRP AD is 90, OSPF AD is 110). If multiple paths exist within the same protocol (same AD), the...
Mastering Router Path Selection: Best Path Determination (Updated 2025)
Understanding how routers select the best path for packet forwarding is a cornerstone of networking and a key topic for CCNA and CCNP certification exams. Routers use their routing tables to determine the optimal path based on metrics like administrative distance and protocol-specific values. This article dives into the mechanics of path selection, including directly...
Router Switching Mastery: Unlock Efficient Packet Delivery (Updated 2025)
The router is a device that receives a packet from the source on any interface and forwards it to its destination on another interface. This is possible with the router switching function, which encapsulates packets in the data link frame type for the outgoing data link. Before going further, learn the key networking terms for...
How to Verify Interface Settings
As a network engineer, ensuring that Cisco router interface settings are correctly configured is critical for maintaining network performance, security, and reliability. Verifying these settings involves checking interface settings status, IP configurations, duplex settings, and other parameters to ensure they align with the network design. This article provides a step-by-step guide to verifying Cisco router...
How to Configure an IPv4 Loopback Interface
The IPv4 loopback interface is logically configured internally in the router. In this lesson, we should discuss this interface configuration, but at this stage, it is necessary to know the IPv4 interface configuration before the IPv4 loopback interface configuration. I discussed the IPv4 interface configuration in one of my previous lessons. The address of the...
How to Enable IP Address on Network Switches
For CCNA and CCNP students, understanding how to enable IP address on network switches is critical for enabling remote management and ensuring efficient network operations. Network switches, unlike routers, primarily operate at Layer 2, forwarding frames based on MAC addresses. However, to manage a switch remotely using protocols like SSH, Telnet, HTTP, or HTTPS, an...
What is Console Access to Cisco Devices
Console Access is an essential topic for networking students, so I will explain console access to Cisco devices in this lesson. All Cisco routers and switches have a console port, the management interface. It connects a computer directly to a router or switch and manages it. The console port is also used for initial configuration....
Introduction to Status LEDs of Ethernet and Network Devices
Device status LEDs are essential tools for CCNA and CCNP students, offering quick visual cues to diagnose network issues. These indicators on NICs, hubs, routers, and switches help troubleshoot connectivity, performance, and faults efficiently. This article explores common LED meanings, Cisco-specific indicators, and practical tips to master network monitoring for certification and real-world success. Ethernet...
How to Assign an IP Address to Windows Computer
Assigning IP addresses to host computers and network devices is a critical skill for CCNA and CCNP students, ensuring efficient network communication and management. This article explores two primary methods—static and dynamic IP assignment—providing step-by-step guidance on how to assign an IP address to Windows hosts and Cisco devices. Mastering these techniques to assign an...