题目内容

A company implements video conferencing over IP on their Ethernet LAN. The users notice that the network slows down, and the video either stutters or fails completely. What is the most likely reason for this?（）

A. minimum cell rate (MCR)
B. quality of service (QoS)
C. modulation
D. packet switching exchange (PSE)
E. reliable transport protocol (RTP)

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更多问题

Where is the rsh log located?（）

A. /var/spool
B. /var/perf
C. /var
D. /var/adm

利润表的格式主要有多步式和单步式两种，我国采用多步式。

A. 正确
B. 错误

圆形垫圈的内孔属于（）外形属于（）。

预算松弛问题从本质上说就是代理问题。

A. 正确
B. 错误