A ping fails when performed from router R$1$ to directly connected router R$2.$ The network administrator then proceeds to issue the show cdp neighbors command. Why would the network administrator issue this command if the ping failed between the two routers?a$)$tThe network administrator suspects a virus because the ping command did not work.b$)$tThe network administrator wants to verify Layer $2$ connectivity.c$)$tThe network administrator wants to verify the IP address configured on router R$2.$d$)$tThe network administrator wants to determine if connectivity can be established from a non$-$directly connected network.