Which of the following is the correct next step in physically installing a router after the LAN cables are connected to LAN ports when using an external CSU/DSU?
A) Connect the router's serial interface to the CSU/DSU and the CSU/DSU line from the telco.
B) Connect the router's serial interface to the line from telco.
C) Connect the router's console port to a PC to configure the router.
D) Connect a power cable from a power outlet to the power port on the router.
A
Explanation: A) When an external CSU/DSU is used, the router's serial interface should be connected to the CSU/DSU and the CSU/DSU line from the telco in sequence after the LAN cables are connected.
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