(single) Which layer of the OSI model does the router mainly work on?
Answer(s): C
(single) A part of the field in the IP packet is used to describe the lifetime of the packet, that is, the TTL value. What is the maximum value?
Answer(s): A
(single) Is the following description correct? The transmission form of the LAN is generally based on the bus type. The most commonly used corresponding protocol is the carrier sense and collision detection CSMA/CD protocol.
(single) Is the following description correct? Ethernet technology is a widely used technology. It is divided into 10M, 100M, and 1000M according to different transmission rates. The common transmission medium for 10M and 100M Ethernet is twisted pair, but 1000M Ethernet is too fast. The transmission medium must be optical fiber.
Answer(s): B
(Single) Is the following description correct? The method of determining whether the received broadcast frame is received by the computer in the local area network is to determine whether the source MAC address of the frame is the same as the hardware address of the local machine.
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