Why the sudo donot need password in the rc.local?

Why the sudo donot need password in the rc.local?

I have added
sh /home/victor/startupAP.sh
into /etc/rc.local
and the startupAP.sh contains statement which need sudo,
$ cat startupAP.sh
#!/bin/bash
sudo hostapd -B /etc/hostapd/hostapd.conf 2>&1 >/home/victor/startupap.log
#sudo ifconfig wlan1 192.168.0.1 netmask 255.255.255.0; sudo dhcpd wlan1
-pf /var/run/dhcp-server/dhcpd.pid; sudo bash -c "echo 1
>/proc/sys/net/ipv4/ip_forward"; sudo iptables -t nat -A POSTROUTING -o
eth0 -j MASQUERADE
sudo ifconfig wlan1 192.168.0.1 netmask 255.255.255.0 2>&1
>>/home/victor/startupap.log
sudo dhcpd wlan1 -pf /var/run/dhcp-server/dhcpd.pid 2>&1
>>/home/victor/startupap.log
sudo bash -c "echo 1 >/proc/sys/net/ipv4/ip_forward" 2>&1
>>/home/victor/startupap.log
sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE 2>&1
>>/home/victor/startupap.log
If I run this script in the terminal, it needs password,
$ sudo ./startupAP.sh
[sudo] password for victor:
but if I reboot ubuntu, this script ran and worked as expected without
password, why?