1.1 Ports And Protocols Flashcards
Port 22
SSH (Secure Shell) & SFTP (Secure File Transfer Protocol)
SSH- cryptographic network protocol for operating network services securely over an insecure network. Via terminal
SFTP- file transfer via SSH
Port 53
DNS (Domain Name Server)
Converts domain names to IP addresses
Port 25
SMTP (Simple Mail Transfer Protocol)
Internet standard for sending electronic mail
Port 20 & 21
FTP (File Transfer Protocol)
Transfer computer files between client and Server.
Listens on port 21 and sends data on port 20
Port 69
TFTP (Trivial file transfer protocol)
A stripped down version of ftp used for booting an OS from a LAN file server
Port 23
Telnet
Insecure text oriented communication in a terminal
Ports 67,68
DHCP (dynamic Host control protocol)
DHCP server dynamically assigns IP addresses to clients on the network.
Port 80
HTTP (hypertext transfer protocol)
Protocol for insecure web pages .
Port 443
HTTPS (hypertext transfer protocol secure)
Protocol for secure web pages
Port 161
SNMP (simple network management protocol)
Provides collection and organization of Information about managed devices on IP Networks
Port 139
NetBios
Allows applications on seperate computers to communicate over a LAN .
Port 3389
RDP (remote desktop protocol)
Provides user with graphical interface to connect to another computer over a network connection.
Port 123
NTP ( network time protocol)
Provide clock synchronization between computer systems
Ports 5060,5061
SIP (session initiation protocol)
Provides signaling and controlling multimedia communication sessions in apps . Used mainly for VOIP and Instant messages.
Port 445
SMB (server message block)
Provides shared access to files and printers
Port 110
POP (post office protocol)
Used by local email clients bro retrieve mail from a remote server
Port 443
IMAP (internet mail application protocol)
Provides email clients to retrieve emails from a mail server and allows end users to view and manipulate messages as if stored locally.
Port 389
LDAP (lightweight directory access protocol)
Is used for directory services authentication. This is the same port active directory uses
Port 636
LDAPS (lightweight directory access secure)
Is used for directory service authentication over SSL
Port 1720
H.323 is a protocol or audio and visual communication
What is ICMP
Internet control message protocol. It is an error reporting protocol .
What is UDP
User datagram protocol
It is a connectionless protocol that has unreliable transports . This is good for audio and video streaming because it has a lower overhead for increased performance.
TCP
Transmission Control protocol
Is a connection oriented protocol with reliable transport. If Segments are dropped , it detects I and resends it.
