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Which layer of OSI model will have problem if you get message "Serial1 is down, line protocol is down" after typing "show interface serial 1"

  • Physical Layer
  • Datalink Layer
  • Network layer
  • It is router problem

Answer: Option A

Similar Questions :

1. How to display configurable parameters and statistics of all interfaces on router

  • show running-config
  • show startup-config
  • show versions
  • show interfaces

Answer: Option D

2. How many simultaneous sessions a Cisco router support by default

  • 3
  • 4
  • 5
  • 6

Answer: Option C

3. Which command will show all commands available from that particular mode

  • config
  • enable
  • interface
  • ?

Answer: Option D

Explanation:

? is called help command. It shows all commands available from mode in which you are login

4. Command to delete NVRAM on a router

  • delete NVRAM
  • delete running-config
  • erase NVRAM
  • erase start

Answer: Option D

5. If you delete contents of NVRAM and reboot router, in which mode you will enter

  • Privileged mode
  • Global mode
  • Setup mode
  • There will be error

Answer: Option C

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