Ports And Protocols Flashcards
Memorize ports and what they do.
TCP
Transmission Control Protocol
Establishes connection from source and destination devices and sends packages sequentially. If a package is missed then it will resend it.
UDP
User Datagram Protocol
Sends packets faster since it does not care if package arrives it or not.
Ex. Phone calls.
ICMP
Internet control Message protocol
Network layer internet protocol that reports errors and provides other information that is revelant to IP packet
IP
Connectionless service.
3 groups
0 - 65535 ports
Well known groups 0-1023
Register ports- 1024- 49151
Dynamic or privates ports 49151 - 65535
DNS
What port?
Domain name system
FQDN (fully qualify domain name to IP)
Port : 53
Usually UDP
TCP is used DNS server to DNS server synchronization.
SMTP
What is is use for ?
What Port
Simple Mail Transfer Protocol
Send and Foward Emails.
Port: 25
TCP
Popv3
What is the port?
What is the Con?
Retrieve/receing emails
(Post Office Protocol Version 3)
Port: 110
Emails will get erase from server
IMAP
Port ?
What is the benefit?
Internet Message Access Protocol
Port 143
Manage emails on server: Gmail, Outlook. It is cloud base.
Telnet
Port?
What is the problem?
Allows to do a remote logon
Port: 23
TCP
Clear text protocol - people can do packet capturing
SSH
Port?
What is the benefit
Secure Shell
Port: 22
TCP
Creates Tunnell and will encrypt data.
FTP
Ports?
Benefit
File Transfer Protocol
Commands from source to Server - Port 21
Data transfer - Port 22
TCP
Clear text port also.
SFTP
Port
Secure Shell File Transfer Protocol
Port: 22
TFTP
Port
Trivial file transfer protocol
Port: 69
UDP
DHCP
Ports
Dynamic Host Config protocol
How Host get their IP
Ports: 67 and 68
