255.255.255.255
255.255.255.255 is the limited broadcast address — a packet sent to it reaches every host on the local network segment.
What it is used for
Used by protocols like DHCP discovery before a device has an IP. Routers do not forward it.
Where you will see it
Understanding reserved addresses like this is core CCNA knowledge — they appear constantly in routing tables, DHCP and troubleshooting.
Frequently asked questions
What is 255.255.255.255?
255.255.255.255 is the limited broadcast address — a packet sent to it reaches every host on the local network segment.
Is 255.255.255.255 routable on the internet?
No — it is a reserved special-purpose address and is not routed on the public internet.
Where is it used?
Used by protocols like DHCP discovery before a device has an IP. Routers do not forward it.
Related
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