【导读】
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1. [单选题]路由器当前的模式为“端口模式”，要退回到“特权模式”，应该使用的快捷键为（）
A. ctrl+b
B. ctrl+z
C. ctrl+c
D. ctrl+p
2. [单选题]基本IP访问权限表的表号范围是：()
A. 1—100
B. 1-99
C. 100-199
D. 800-899
3. [多选题]Regarding DHCP (dynamic host configuration protocol), which two of the following choices below are true? (Select two answer choices)
A. The DHCP Discover message uses FF-FF-FF-FF-FF as the Layer 2 destination address.
B. The DHCP Discover message uses UDP as the transport layer protocol.
C. The DHCP Discover message uses a special Layer 2 multicast address as the destination address.
D. The DHCP Discover message uses TCP as the transport layer protocol.
E. The DHCP Discover message does not use a Layer 2 destination address.
F. F. The DHCP Discover message does not require a transport layer protocol.
4. [单选题]把指定端口添加到VLAN的命令是：()
A. vlan
B. vlan-member ship
C. vtp
D. switch port
5. [单选题]哪个ACL可允许主机10.220.158.10访问web服务器192.168.3.244()
A. access-list 101 permit tcp host 10.220.158.10 eq 80 host 192.168.3.224
B. access-list 101 permit tcp 10.220.158.10 0.0.0.0 host 192.168.3.224 0.0.0.0 eq 80
C. access-list 101 permit host 10.220.158.10 0.0.0.0 host 192.168.3.224 0.0.0.0 eq 80
D. access-list 101 permit tcp 10.220.158.10 0.0.0.0 host 192.168.3.224 eq 80
