问题
单项选择题
In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet.
To a router, a flow is a (71) of packets that share the same characterstics, such as traveling the same (72) , using the same (73) , having the same kind of security, and so on. A router that supports the handling of flow labels has a (74) table. The table has an entry for each Active flow label; each entry defines the (75) required by the corresponding flow label.
（73）是（）
A.source
B.resources
C.route
D.Entry
答案
参考答案：B
解析：
根据上下文意思，使用同样的资源，选择B