$5.\_\_\_\_\_\_\_\_$is an Application$-$layer protocol used to monitor and manage network devices, and operates on $\_\_\_\_\_\_\_\_$ ports, $\_\_\_\_\_\_\_\_$and $\_\_\_\_\_\_\_\_.$

a$.$

DHCP $($Dynamic Host Configuration Protocol$),$ TCP $($Transmission Control Protocol$),67$ and $68$

b$.$

SNMP $($Simple Network Management Protocol$),$ UDP $($User Datagram Protocol$),161$ and $162$

c$.$

SMTP $($Simple Mail Transfer Protocol$),$ TCP$,25$ and $26$

d$.$

FTP $($File Transfer Protocol$),$ UDP, $20$ and $21$