Port Numbers

Question 1

FTP-TCP

Answer 1

20-21//transfer computer files from one host to another over TCP, client-server architecture

Question 2

SSH -TCP

Answer 2

22//Secure Socket Shell, UNIX-based command for securely getting access to a remote computer

Question 3

Telnet- TCP

Answer 3

23//allows user on one computer to log onto another computer on the same NW

Question 4

SMTP

Answer 4

25//simple mail transfer protocol, internet standard for email transmission

Question 5

WINS

Answer 5

42//used to identify & locate computers to resolve names for use on NW

Question 6

DNS (TCP/UDP)

Answer 6

53//internet domain names are located & translated into IP addresses

Question 7

DHCP UDP

Answer 7

67

Question 8

TFTP- UDP

Answer 8

69

Question 9

HTTP

Answer 9

80,8080//Hypertext Transfer Protocol, standard for transferring hypertext documents on the WWW (world wide web)

Question 10

Kerberos TCP/UDP

Answer 10

88 secure method for authenticating a request for a service in a computer NW

Question 11

POP3 TCP

Answer 11

110//protocol for receiving email by DL’ing it to your cmoputer from a mailbox on the server of an ISP (internet service provider)

Question 12

NTP

Answer 12

123//used to synchronize computer clock times in a NW of computers

Question 13

RPC TCP

Answer 13

135

Question 14

NETBIOS TCP/UDP

Answer 14

137-139//used by DOS & Windows to share files

SMB over TCP/IP uses -

Port 445

Question 15

IMAP TCP

Answer 15

143 //Internet Message Access Protocol (app layer) allows email client to access emails on remote email server

Question 16

SNMP-UDP

Answer 16

161,162//Simple NW MGMT protocol, Monitor NW devices & trap messages

Question 17

BGP

Answer 17

179

Question 18

LDAP

Answer 18

389//Lightweight Directory Access Protocol, standard used to query & organize DBs

Question 19

HTTPS TCP

Answer 19

443//standard for users to share files across corporate intranets & internets

Question 20

SMB TCP

Answer 20

445

Question 21

Syslog

Answer 21

514//standard for message logging

Question 22

Secure LDAP

Answer 22

636

Question 23

WINS

Answer 23

1512; Windows Internet Naming Service that maps NetBIOS names to IP addresses; solves problem of NetBIOS name resolution in routed environments