Which size of frames are treated as invalid frames? ( )
A. frames smaller than 64
B. frames smaller than 128
C. frames smaller than 100
D. frames smaller than 512
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Which of the following MAC addresses is correct?（ ）
A. 00-45-6B-3A-34-2H
B. 192.168.1.55
C. 65-10-96-58-16D
D. 00-06-5B-4F-45-BA
The mask of a subnet is 255.255.255.248. So the subnet at most can connect ( ) hosts.
A. 8
B. 6
C. 248
D. 246
Network core does not include () .
A. routers
B. packet switches
C. links
D. smart phones
Which tool can capture network packets and display that packet data? ( )
A. Internet Explorer
B. Wireshark
C. FileZilla
D. Firefox
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