Matching Pairs Network ProtocolsOnline version CompTIA A+ Common Network Protocols by Joe King 1 LDAP 2 SSH 3 DHCP 4 AFP 5 SNMP 6 SLP 7 SMB 8 DNS UDP/67-68 TCP/445 TCP/548 UDP/53 TCP/427 UDP/427 TCP/22 TCP/389 UDP/389 UDP/161