IP (Internet Protocol) FAQ
What is a subnet?
A subnet is a portion of a larger network address. A subnet address and a subnet mask define subnets. These allow the administrator to physically separate related machines and differentiate between local and remote IP traffic. Hosts on subnets are able to communicate across a routed network, which is ideal for separating workgroups within a company or smaller companies when attached to one ISP.
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What is an IP allocation?
An IP allocation is a range of IP addresses that are allocated to you by your Internet Service Provider (ISP) for the duration of your contract with that ISP. The amount of IP address space (or IP addresses) that is allocated to you is based on a subjective analysis of your future needs. This is done based on information provided by you on a form provided by the European IP Allocation Authority (RIPE).
Please visit http://www.ripe.net for more information.
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Can I reserve IP allocations for future use?
No. IPs are allocated as and when they are needed. RIPE (the European IP Allocation Authority) does not allow reservation of IPs. A subjective analysis is made as to your future needs and a decision is made.
Please visit http://www.ripe.net for more information.
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What is ’private’ IP address space?
Private address space is an IP range that has been set aside for internal networks. It can be used behind firewalls and on networks not connected to the Internet. Full details are available in RFC1918 which is available from http://www.ietf.org/rfc/rfc1918.txt?number=1918
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