You’re a network administer and you issue the command (show port 3/1) on an Ethernet port.
To your surprise you notice a non-zero entry in the ‘Giants’ column. What could be the cause
of this?
A. IEEE 802.1Q
B. IEEE 802.10
C. Misconfigured NIC
D. User configuration
E. All of the above
Answer: A
求助有识之士次题目什么意思,关键是无法理解non-zero entry in the ‘Giants’ column是什么意思. 随便能否点明一下次题的考点? 感谢..
题目的意思是你作为一名网络管理员,通过命令show port 3/1查看以太网端口的状态,发现有无法识别的“巨型帧”。"Giants" 巨型帧,"column ".所以"non-zero entry in the ‘Giants’ column"整句可直接理解为此端口发现了无法识别的巨型帧。只有起trunk的接口或者单臂路由的以太网端口能够识别巨帧,所以交换机上的以太网接口是无法识别的。添加了802.1q或者ISL的封装都会使得原本的帧长度变长,成为巨帧。故选A.