符号定址,符号编码

symbolic addressing的用法和样例：

例句

WAN standards typically describe both physical layer delivery methods and data link layer requirements, including physical addressing, flow control, and encapsulation.广域网路标准典型地描述实体层的传送方法和资料链结层的需求，包括实体层定址，流量控制和封装。
When this feature is disabled any packets received that are destined for a subnet that falls within the subnetwork addressing scheme of the router will be discarded.如果此功能被停用，当路由器收到目的地为特定子网路的封包，而这些子网路正好在路由器的子网定址机制内，则这些封包将被丢弃。

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