What is VLAN? A Virtual Local Area Network (VLAN) is a network technology used to divide a single physical network into multiple logical networks. This division is achieved at the data link layer (Layer 2) of the OSI model. VLANs are widely used in enterprise networks for their ability to improve network efficiency, security, and manageability. Key Concepts… Read More »
What is DNS? The term Domain Name System (DNS) is not new to the Internet environment. We will talk about what is DNS and how DNS lookup works. DNS is an application layer protocol used throughout the Internet for translating hostnames into their associated IP addresses. Every website and its subdomains have an IP address to be connected… Read More »
What Is ACLs? Access Control Lists (ACLs) are a set of rules used in networking to control the flow of traffic into and out of network devices like routers and switches. These rules determine which packets (small units of data) are allowed or denied passage through a network interface. ACLs are crucial for network security and traffic management.… Read More »
Troubleshooting Access Control List (ACL) errors. Using the show commands reveals most of the more common ACL errors before they cause problems in your network. When you look at an ACL configuration, check it against known rules you learned regarding how to build ACLs correctly. Most errors occur because these basic rules are ignored. The most common errors are entering ACL… Read More »
Understanding the Border Gateway Protocol (BGP) The Border Gateway Protocol (BGP) is a sophisticated and advanced distance-vector routing protocol, often categorized as an Exterior Gateway Protocol (EGP). In various sectors, it has earned the moniker of the “big dog” of internet protocols. Interaction Between Autonomous Systems BGP facilitates the exchange of routing information between different Autonomous Systems (ASs).… Read More »
