From the course: Cisco CCNA (200-301) Cert Prep: 1 Network Fundamentals and Access

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IPv4 addressing and subnetting

IPv4 addressing and subnetting

From the course: Cisco CCNA (200-301) Cert Prep: 1 Network Fundamentals and Access

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IPv4 addressing and subnetting

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- [Instructor] A lot of information flows through networks via IPv4 addressing, but before I can demonstrate how to configure it on equipment, I first must explain how it operates. And this is easily one of the most difficult parts of a fledgling engineer's studies. An IPv4 address which I'll just refer to as an IP address for the remainder of this chapter, is a 32-bit number that's broken down into four octets. So 32 divided by four tells me that each octet is comprised of eight bits. In an IP address each octet is separated by a period, which is why it's called dotted decimal format. Each octet can range from zero to 255 in decimal notation, of from eight zeros to eight ones in binary. IP addresses are converted to binary one octet at a time. So only eight binary digits need to be managed at once. With binary each position can be thought of as on-off switch. If it's set to zero then it's off, while a one denotes on. Each binary position equals the numbers shown here. Starting for…

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