Ccna - Tcp Ip Protocols

Front 1

TCP

Back 1

Transmission Control Protocol

Front 2

UDP

Back 2

User Datagram Protocol

Front 3

IP protocol

Back 3

Internet protocol

It operates at the Network Layer of the OSI model. It is connectionless and is responsible for transporting data over the network.

Front 4

FTP

Back 4

File Transfer Protocol

FTP operates at the Application Layer and is responsible for reliably transporting data across aremote link. Because it has to be reliable, FTP uses TCP for data transfer.

FTP uses ports 20 and 21.

Front 5

TFTP

Back 5

Trivial File Transfer Protocol

Trivial File Transfer Protocol

Front 6

SMTP

Back 6

Simple Mail Transfer Protocol

SMTP defines how e-mails are sent to the e-mail server from the client. It uses TCP to ensure areliable connection. SMTP e-mails are pulled off the SMTP server in different ways, and SMTP isused as an e-mail delivery service by most networks. SMTP uses port 25.

Front 7

HTTP

Back 7

Hyper Text Transfer Protocol

HTTP uses TCP (port 80) to send text, graphics, and other multimedia files from a web server toclients. This protocol allows you to view web pages, and it sits at the Application Layer of theOSI model. HTTPS is a secure version of HTTP that uses Secure Sockets Layer (SSL) or TransportLayer Security (TLS) to encrypt the data before it is sent.

Front 8

Telnet

Back 8

Telnet uses TCP (port 23) to allow a remote connection to network devices. You will learn moreabout Telnet in the labs. Telnet is not secure so many administrators are now using SecureShell (SSH), which uses TCP port 22, as an alternative to ensure a secure connection.

Front 9

ICMP

Back 9

Internet Control Message Protocol

ICMP is a protocol used to report problems or issues with IP packets (or datagrams) on anetwork. ICMP is a requirement for any vendor who wishes to use IP on their network. When aproblem is experienced with an IP packet, the IP packet is destroyed and an ICMP message isgenerated and sent to the host that originated the packet.