Computer Networking 面试题与答案
问题 16. How Gateway is different from Routers?
A gateway operates at the upper levels of the OSI model and translates information between two completely different network architectures or data formats.
问题 17. What is attenuation?
The degeneration of a signal over distance on a network cable is called attenuation.
问题 18. What is MAC address?
The address for a device as it is identified at the Media Access Control (MAC) layer in the network architecture. MAC address is usually stored in ROM on the network adapter card and is unique.
问题 19. Difference between bit rate and baud rate.
Bit rate is the number of bits transmitted during one second whereas baud rate
refers to the number of signal units per second that are required to represent those
bits.
baud rate = bit rate / N where N is no-of-bits represented by each signal shift.
问题 20. What is Bandwidth?
Every line has an upper limit and a lower limit on the frequency of signals it can carry. This limited range is called the bandwidth.
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