99色精品-9色在线-99色在线-99色视频 国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

單項選擇題

While using a packet analyzer, you notice four additional bytes being added to the packets in the  Company network. 
Which protocol inserts a four byte tag into the Ethernet frame and recalculates  CRC value?  ()

A. DTP
B. VTP
C. 802.1Q
D. ISL
E. None of the other alternatives apply

微信掃碼免費搜題