单项选择题

Determining when to retransmit frames is an example of which of the following Ethernet properties?（）

A. Carrier sense
B. Collision detection
C. Multiple access points
D. Collision avoidance

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单项选择题

Which of the following address formats uses 32-bit addressing?（）

A.IPv4
B.MAC address
C.IPv6
D.Host address

单项选择题

A user reports that their laptop does not have network connectivity, but was working fine last week. The technician executes IPCONFIG to see what the IP address is but it comes up with a 169.254.254.1 address. This address is not part of the company's subnet.
Which of the following MOST likely identifies this address type?（）

A.Multicast
B.DHCP
C.APIPA
D.Broadcast

单项选择题

In which of the following topologies could the failure of one machine cause the entire network tostop functioning?（）

A. Mesh
B. Token ring
C. Star
D. Spanning tree