Networking, Addressing, and Communication Lesson 002: IPv4
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20 Terms
Internet Protocol Version 4
A 32-bit number written in a format known as dotted-decimal notation.
What does IPv4 stand for?
Internet Protocol Version 4.
What is the most widely used protocol for assigning IP addresses to devices on a network?
IPv4.
When was IPv4 introduced?
The early 1980s.
What does IPv4 do in function?
Logically identifies devices on a network, assigning each a unique address for data exchange.
Dotted-Decimal Notation
The practice of breaking up the 32-bit IPv4 address into four 8-bit segments, known as octets.
Why is there a shift from IPv4 to IPv6?
Because there are essentially no new IPv4 addresses left to distribute.
Why is IPv4 the most used IP address version?
Because of simplicity, familiarity, and widespread adoption.
What two portions are IPv4 addresses made up of?
The network portion and the host portion. This effectively creates what is known as a subnet mask.
Subnet Mask
Specifies which part of the IPv4 address identifies the network and which part identifies individual hosts.
How is a subnet mask represented?
With a series of 1s and 0s.
What do the 0s and 1s represent in a subnet mask?
1s represent the network portion, and 0s represent the host portion of the mask.
What is the host portion of an IPv4 address?
The IP addresses that can be used by users operating on that network address.
What does networking equipment use to determine whether two devices are on the same network and whether or not data needs to be routed to a different network?
The subnet mask.
What is the biggest limitation when it comes to IPv4?
It's a 32-bit addressing scheme.
How many unique IPv4 addresses are there?
4.3 billion addresses.
Network Address Translation
Allows multiple devices to share a single public IP address.
What does NAT stand for?
Network Address Translation.
What is private addressing?
Addresses reserved for use inside private networks that are not routable to the Internet.
What does private IP addressing make possible?
For IP addresses to be reused across all networks.