Network+ Objective 1.1 Explain purposes & uses of ports & protocols

H.323, TCP, 1720

A VoIP standard that handles the initiation, setup, and delivery of VoIP sessions.

LDAP (Lightweight Directory Access Protocol)-389 TCP

A communications protocol that defines how a client can access information, perform operations, and share directory data on a server.

SMTP (Simple Mail Transfer Protocol)-Port TCP 25

A communications protocol that enables sending email from a client to a server or between servers. Port 25

ICMP (Internet Control Message Protocol)

A core protocol in the TCP/IP suite that notifies the sender that something has gone wrong in the transmission process and that packets were not delivered.

DHCP (Dynamic Host Configuration Protocol)-Port UDP 67 & 68

A network service that provides automatic assignment of IP addresses and other TCP /IP configuration information.

SFTP (Secure File Transfer Protocol)-Port TCP 22

A protocol available with the proprietary version of SSH that copies files between hosts securely. Like FTP, SFTP first establishes a connection with a host and then allows a remote user to browse directories, list files, and copy files. Unlike FTP, SFTP encrypts data before transmitting it.

SMB (Server Message Block)- Port 445 TCP

A protocol that works on the Application layer and is used to share files, serial ports, printers, and communications devices, including mail slots and named pipes, between computers.

FTP- (File Transfer Protocol)-Port TCP20 & 21

A protocol used to move files and folders over a network or the Internet.

TFTP (Trivial File Transfer Protocol)-Port UDP 69

A simple version of FTP that uses UDP as the transport protocol, and does not require a logon to the remote host.

SNMP (Simple Network Management Protocol)- Port UDP 161

An Application-layer protocol used to exchange information between network devices.

NTP (Network Time Protocol)- Port UDP 123

An Internet protocol that enables synchronization of computer clock times in a network of computers by exchanging time signals.

Connectionless

No connection with the destination is established before sending data packets.

SSH (Secure Shell)-Port 22

TCP 22 UDP 22 is a cryptographic network protocol for operating network services securely over an unsecured network. ... SSH was designed as a replacement for Telnet and for unsecured remote shell protocols such as the Berkeley rlogin, rsh, and rexec protocols

DNS (Domain Name System)-Port 53

The naming service used on the Internet and many TCP/IP-based networks. Port 53

LDAPS (Lightweight Directory Access Protocol Secure)- 636

a client/server protocol used to access and manage directory information. It reads and edits directories over IP networks and runs directly over TCP/IP using simple string formats for data transfer.

IMAP (Internet Message Access Protocol)- 143 TCP or UDP

a common protocol for retrieving email messages via the Internet

TElNET-Port TCP 23

a network protocol that allows a user on one computer to log onto another computer that is part of the same network.

RDP (Remote Desktop Protocol)- Port TCP 3389

a proprietary protocol developed by Microsoft, which provides a user with a graphical interface to connect to another computer over a network connection. The user employs RDP client software for this purpose, while the other computer must run RDP server softwa

POP(Post Office Protocol)- Port 110 TCP

a protocol for receiving email by downloading it to your computer from a mailbox on the server of an Internet service provider... SSL/TLS port, also known as POP3S 995

SIP(Session Initiation Protocol)- Port TCP or UDP 5060 & 5061

a signaling protocol used for initiating, maintaining, and terminating real-time sessions that include voice, video and messaging applications

HTTPS-Port TCP 443

is the use of Secure Socket Layer (SSL) or Transport Layer Security (TLS) as a sublayer under regular HTTP application layering. HTTPS encrypts and decrypts user page requests as well as the pages that are returned by the Web server

HTTP (Hypertext Transfer Protocol)-Port TCP 80

the protocol used for transmitting web pages over the Internet

connection-oriented

used to describe the reliable nature of TCP. The connection refers to the 3-way handshake required in TCP before data transmission.

IP(Internet Protocol)

~An agreed upon set of requirements for delivering packets across a network ~The address for every computer of device on that network

UDP (User Datagram Protocol)

~connectionless protocol that does not require a connection to send a packet and does not guarantee that the packet arrives at its destination. ~A connectionless Transport-layer protocol that is one of the protocols in the Internet protocol suite, and is used with IP. It is also known as the Universal Datagram Protocol.