switchport trunk allowed vlan remove/except vlan 100的区别问题

plays2

QUESTION 305
EXHIBIT - switchport trunk allowed vlan 1,80,99-250
Which two commands will remove VLAN 100 from the allowed VLAN list? (Choose two.)
A. switchport trunk allowed vlan remove vlan 100
B. switchport trunk allowed vlan 1-80,99,101-250
C. switchport trunk allowed vlan except vlan 100
D. NA
Correct Answer: AB
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QUESTION 290Which two commands is used to remove VLAN 55 from the trunk port?(Choose two.)A. switchport trunk allowed vlan add 3, remove 55B. switchport trunk allowed vlan remove 55C. switchport trunk allowed vlan except 55D. NACorrect Answer: BC
在学习时发现题库里两道题都不完整，有点接近，但不完全一样，有点晕了。问题集中在这两条switchport trunk allowed vlan remove vlan 100和switchport trunk allowed vlan except vlan 100的区别。资料没翻到，有哪位老师和同学帮忙解释下吗？谢谢。我理解是不是remove是将vlan从vlan list中直接除掉，不再传；而except是不对vlan list操作，只是丢弃而已。不知道对不对？

gcclove

remove vlan100是在trunk中移除vlan 100，而后者是不允许vlan100通过trunk口

plays2

非常感谢回复