UDP Ports

Question 1

Domain Name System uses UDP for DNS queries

Answer 1

53 (DNS)

Question 2

Server port for the Dynamic Host Configuration Protocol (DHCP)

Answer 2

67 (DHCPS)

Question 3

Client port for the Dynamic Host Configuration Protocol (DHCP)

Answer 3

68 (DHCPC)

Question 4

Trivial File Transfer Protocol

Answer 4

69 (TFTP)

Question 5

Network Time Protocol

Answer 5

123 (NTP)

Question 6

Advertises what RPC services are available in a Windows environment

Answer 6

135 (MSRPC)

Question 7

NetBIOS Name Service supports Windows File Sharing with pre-Windows 2000
version hosts

Answer 7

137 (NETBIOS-NS)

Question 8

NetBIOS Datagram Service supports Windows File Sharing with pre-Windows
2000 version hosts

Answer 8

138 (NETBIOS-DGM)

Question 9

NetBIOS Session Service supports Windows File Sharing with pre-Windows 2000
version hosts

Answer 9

139 (NETBIOS-SSN)

Question 10

Agent port for Simple Network Management Protocol

Answer 10

161 (SNMP)

Question 11

Management station port for receiving SNMP trap messages

Answer 11

162 (SNMP)

Question 12

Supports Windows File Sharing (Server Message Block over TCP/IP) on current
Windows networks

Answer 12

445 (MICROSOFT-DS)

Question 13

Supports Windows File Sharing (Server Message Block over TCP/IP) on current
Windows networks

Answer 13

445 (MICROSOFT-DS)

Question 14

Internet Security Association and Key Management Protocol that is used to set up
IPSec tunnels

Answer 14

500 (ISAKMP)

Question 15

Server port for a syslog daemon

Answer 15

514 (SYSLOG)

Question 16

Routing Information Protocol

Answer 16

520 (RIP)

Question 17

Internet Printing Protocol

Answer 17

631 (IPP)

Question 18

Microsoft SQL Server

Answer 18

1434 (MS-SQL)

Question 19

Universal Plug and Play is used for autoconfiguration of port forwarding by games
consoles and other smart appliances

Answer 19

1900 (UPNP)

Question 20

Used to set up IPsec traversal through a Network Address Translation (NAT)
gateway

Answer 20

4500 (NAT-T-IKE)