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Q&A: What is a /24 or Class C Address Space?

Question

  • What is a /24 or Class C Address Space?

Environment

  • Silverline DDoS
  • Network

Answer

1 A /24 refers to a subnet of 256 IP addresses assigned to the customers company by ARIN
2 A /24 encompasses the entire last octet, and sometime shown as as 192.168.10.x or 192.168.10.0/24.  Remember that addresses starting in 192.168 or 10. or 172 are RFC1918 addresses and do not actually appear on the internet (they're used for local addressing on your LAN)
3 A /24 is the smallest network that Internet Carriers will exchange.
4 Silverline can announces any number of /24s as necessary for the customer.
5 A /24 address is also known as Class C Internet address space.
6 If you are a DDoS customer in Always Available mode, and are "Routed", then the smallest address space that can be advertised through BGP to our peers to route traffic through us is Class C or /24 address space.

 

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