单项选择题
Which command can be a router to verify the layer 3 path to a host？（）
A.traceroute address
B.tracert address
C.ssh address
D.telnet address
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相关考题
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单项选择题
出于安全考虑，网络管理员需要去防止外网主机PING内网，下面哪个协议应该用access control lists限制掉？（）
A.IP
B.ICMP
C.TCP
D.UDP -
单项选择题
A company has a small network，consisting of a single switch and a single router. The switch has been configured with two vlans，and route-on-a-stick is being configured on the router for inter-vlan routing. A trunk is configured to connect the switch to the router.What is the minimum number of router subinterfaces that are required for all the vlans to communicate？（）
A.one
B.three
C.two
D.zero -
多项选择题
What can a network administrator utilize by using PPP Layer 2 encapsulation (Choose three.) （）。
A.VLAN support
B.compression
C.authentication
D.sliding windows
E.multilink support
F.quality of service
