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A network address is an identifier for a node or network interface of a telecommunications network. In addition, non terminal nodes are often assigned network addresses. Network addresses are designed to be unique across the network, although some networks allow for local, private addresses or locally administered addresses that may not be unique.
In some cases, terminal nodes may have more than one network address, for example, each link interface may be uniquely identified. Further, because protocols are frequently layered, more than one protocol's network address can occur in any particular network interface or node and more than one type of network address may be used in any one network.
Examples of network addresses include: