SNMP协议实体发送请求和应答报文的默认端口号是（ ），采用UDP提供数据报服务，原因不包括（ ）。
问题1选项
A.160
B.161
C.162
D.163
问题2选项
A.UDP数据传输效率高
B.UDP面向连接，没有数据丢失
C.UDP无需确认,不增加主机重传负担
D.UDP开销小,不增加网络负载
正确答案及解析
正确答案
解析
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