Learning CCNA

Some commands that may help you start your use of Cisco devices ...

Value of Cisco Certifications: Making Money Vs. Study Would you take the job, setting aside your certification plans for a year? How much money would you need to make in that job before it would entice you to abandon your learning and certification plans for a year?

By default, EIGRP calculates metrics based on:

The cumulative interface delay…
The minimum interface bandwidth…
Of all outgoing links in the end-to-end route.

IPv4 :
what's about IPv4 ?
An Internet Protocol address (IP address) is a numerical label assigned to each device (e.g., computer, printer) participating in a computer network that uses the Internet Protocol for communication. An IP address serves two principal functions: host or network interface identification and location addressing. Its role has been characterized as follows: "A name indicates what we seek. An address indicates where it is. A route indicates how to get there.
In IPv4 an address consists of 32 bits which limits the address space to 4294967296 (232) possible unique addresses. IPv4 reserves some addresses for special purposes such as private networks (~18 million addresses) or multicast addresses (~270 million addresses).
IPv4 addresses are canonically represented in dot-decimal notation, which consists of four decimal numbers, each ranging from 0 to 255, separated by dots, e.g., 172.16.254.1. Each part represents a group of 8 bits (octet) of the address. In some cases of technical writing, IPv4 addresses may be presented in various hexadecimal, octal, or binary representations.