The electrical transmission medium can consist of .
A: a pair of wires
B: a coaxial cable
C: a radio link through free space down
D: all of above
A: a pair of wires
B: a coaxial cable
C: a radio link through free space down
D: all of above
D
举一反三
- The transmission media used by 10BASE-T Ethernet is ( ) A: Twisted pair B: Fiber C: Coaxial cable D: Radio waves
- The transmission media used by 10BASE-F Ethernet is ( ) A: Fiber B: Twisted pair C: Coaxial cable D: Radio waves
- Among the following transmission media, the lowest bit error rate is ( ) . A: Optical fiber B: Coaxial cable C: Twisted pair D: Microwave
- Among the following four transmission media, which has the widest bandwidth, the smallest signal transmission attenuation and the strongest anti-interference capability? A: Twisted pair B: Coaxial cable C: Optical fiber D: Microwave
- Which physical connection is the fastest? A: Twisted pair B: Coaxial cable C: Fiber-optic cable D: Microwave
内容
- 0
______________ are a type of cable that is used by cable TV. A: Fiber cables B: Twisted pair cables C: Coaxial cables
- 1
In a data communication system, the transport media with the widest frequency band and best reliability is the( ). A: radio channel B: coaxial cable C: twisted--pair cable D: fiber optic cable
- 2
X-rays _____. A: always travel in a straight line B: can be influenced by an electrical field C: are absorbed equally by the materials they pass through D: None of the above
- 3
Coaxial Cable：____________
- 4
The medium through which communication travels is called a ________. （ ） A: message B: channel C: media D: transmission E: vessel