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- 单项选择题	Refer to the graphic.Computer 1 is consoles into switch A.Telnet connections and pings run from thecommand prompt on switch A fail.Which of the following could cause this problem?()	 
- A、switch A dose not have a cdp entry for switch 
- B、or router JAXB.switch A dose not have an IP address 
- C、port 1 on switch A should be an access port rather than a trunk port 
- D、switch A is not directly connected to router JAX 
- E、switch A does not have a default gateway assigned 
- E
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