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IP address arrangement.

By nky008 ·
Dear Sir,

Usually one IP address corresponds to one host name. However, there are casese where a number of Ip addresses correspond to one host name. There are also cases where one IP address corresponds to a number of host names. Could anybody tell me what are the purposes of these two arrangements ?

Thx!!!
Ed.

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IP address arrangement.

by clmccord In reply to IP address arrangement.

In the case where multiple IP addresses correspond to one host name; One common scenario is to have multiple NIC's in a server/host so that several services i.e. DNS, DHCP, WINS and/or network segments can be serviced from one server/host. This scenario also allows for server load balancing.

In the case where one IP address is assigned to multiple hosts; In a SAN (Server Area Network) you can have several servers/hosts that use individual IP adresses but the SAN sees all these devices as one IP address for management purposes. Another reason for this setup is NAT (Network Adress Translation) this is used to protect internal networks/hosts from the outside world.

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IP address arrangement.

by nky008 In reply to IP address arrangement.

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IP address arrangement.

by Gigelul In reply to IP address arrangement.

Need more detail.
How/where you see the same IP assigned to many hosts in the same LAN (only by a misstake maybe and don't worked). In different LANs is possible.

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IP address arrangement.

by nky008 In reply to IP address arrangement.

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IP address arrangement.

by kevin In reply to IP address arrangement.

Toassign or to see what addresses are assigned to a host, you can look in the properties of the NIC or if using windows type "IPCONFIG".
You cannot assign the same IP to multiple hosts.

One reason for having multiple IP's for one host is if youare running a webserver with more than one site. Host headers can be used instead of multple IP's as long as you do not require SSL.

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IP address arrangement.

by nky008 In reply to IP address arrangement.

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IP address arrangement.

by nky008 In reply to IP address arrangement.

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