What is eBGP? External Border Gateway Protocol (eBGP) is a BGP term or process used when referring to BGP peers or neighbours that are in a different Autonomous System and Number (ASN).In other words, eBGP is used to exchange route information between different autonomous systems. When only one link connects two autonomous systems, the IP addresses of the connected interfaces are… 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 »
What Is CIDR? CIDR (Classless Inter-Domain Routing) was introduced in 1993 (RCF 1517) replacing the previous generation of IP address syntax – classful networks. CIDR allowed for more efficient use of IPv4 address space and prefix aggregation, known as route summarization or supernetting. CIDR introduction allowed for: CIDR allows routers to group routes to reduce the bulk of… Read More »
DHCP assigns IP addresses and other important network configuration information to clients dynamically. Cisco router uses the Cisco IOS feature known as Easy IP as an optional DHCP server. Easy IP leases IP configurations to network clients for 24 hours by default. We use the topology diagram below as a sample network topology. Step 1. Configure excluded address(es): These addresses… Read More »
