An engineer first confirms that a router's interface Fa$0/0$ is up and working. He then configures that interface with the ip address $10\mathrm{.}101\mathrm{.}101\mathrm{.}101255\mathrm{.}255\mathrm{.}255\mathrm{.}128$ command. The engineer leaves configuration mode, and issues the show ip route command. Which of the following masks will be listed in the output that describes the connected route that exists as a result of this new ip address command?

$/25$

$/22$

$/26$

$/23$

None of the other answers are correct, because the ip address command will be rejected.