IP (internet protocol Flashcards
Two common protocols
TCP (transmission control protocol)
UDP (User datagram protocol)
protocol characteristics
inside IP packet
common ways of moving data
Operate at transport layer of OSI
provides multiplexing (different apps using server at the same time)
characteristics of TCP
connection required
reliable delivery (data verification)
manages out of order messages
manage amount of data sent
characteristics of UDP
no connection required
unreliable delivery (no data verification)
cannot manage sent data
Why UDP
useful for real time communication
used to assign IP addresses DHCP
used for TFTP- trivial file transfer protocol
Why TCP
confirm data transfer
no need to worry about missing data
https- send information to web browser
SSH- provides encrypted comms to our systems
what requirements for delivery ?
IP address/ client IP
protocol/ protocol
port number for application/port number for the client to send data
tcp 80, tcp 443
port numbers commonly used for web servers
FTP
File Transfer Protocol,
tcp 20/21
transfer of files between systems
SSH
Secure Shell,
tcp/22,
sends comms as encrypted data
provides a secure connection to remote device console
Telnet
Telecommunication Network,
tcp/23
remote access to devices via terminal or command line, not secure communication
SMTP
simple mail transfer protocol
tcp/25
transfer of mail between servers
DNS
domain name system,
udp/53
makes the connection to the ip address of a website name
DHCP
dynamic host configuration protocol
udp 67/68
leases a custom IP address to a device on a dhcp server
HTTPS/HTTP
hyper text transfer protocol
tcp 80/ tcp 443
encrypted communication with web server for web browsers
