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Nework I
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Nework I
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*
* una VLAN forma un unico dominio de broadcast donde todos los hosts conectados a ella pueden conectarse entre sí.
* In computer security, a DMZ (sometimes referred to as a perimeter network) is a physical or logical subnetwork that contains and exposes an organization's external-facing services to a larger untrusted network, usually the Internet.
* Subredes : A subnetwork, or subnet, is a logically visible subdivision of an IP network.[1] The practice of dividing a network into two or more networks is called subnetting.
* An IPv4 address consists of 32 bits, for human readability written in a form consisting of four decimal octets separated by full stops (dots), called dot-decimal notation.
* An IP address is divided into two logical parts, the network prefix and the host identifier or rest field. All hosts on a subnetwork have the same network prefix.
Binary Form Dot-decimal notation
IP address 11000000.10101000.00000101.10000010 192.168.5.130
------------------------------------------------------------------------------
Subnet mask 11111111.11111111.11111111.00000000 255.255.255.0 (Class C)
------------------------------------------------------------------------------
Network prefix 11000000.10101000.00000101.00000000 192.168.5.0
------------------------------------------------------------------------------
Host part 00000000.00000000.00000000.10000010 0.0.0.130
-------------------------------------------------------------------------------
Broadcast 192.168.5.255
Subnetting
Subnetting is the process of designating some high-order bits from the host part and grouping them with the network mask to form the subnet mask. This divides a network into smaller subnets.
Netmask Bits
--------------
255.0.0.0 / 8
255.255.0.0 / 16
255.255.255.0 / 24 → For example, 255.255.255.0 is the network mask for the 192.168.1.0/24 prefix.
255.255.255.128 / 25
255.255.255.192 / 26
255.255.255.224 / 27
255.255.255.240 / 28
255.255.255.248 / 29
255.255.255.252 / 30