Protocols Flashcards
What are protcols
Protocol is a set of rules or standards
What is FTP?
File transfer protocol (FTP) – a TCP network protocol used for file transfer between one host and another.
What is HTTP?
Hypertext transfer protocol (HTTP) – a protocol to outline how files such as text, images, sound and video are transmitted on the World Wide Web.
What is HTTPS?
Hypertext transfer protocol secure (HTTPS) – similar functionality to the HTTP protocol, but data that is transmitted is encrypted.
What is POP3?
Post office protocol v3 (POP3) – protocol used to receive email data via Port 110; converts incoming email messages into text for display in a user email application.
What is SMTP?
Simple mail transfer protocol (SMTP) – protocol used to send email data via Port 25; an error message is provided where a connection cannot be achieved between the sender and receiver of the email.
What is SSH?
Secure shell (SSH) – protocol used to gain access to remote computers; typically used by website administrators to control web servers remotely.
What does FTP do?
File transfer protocol (FTP) is the set of rules that are generally used to download or upload files over TCP/IP networks, such as the Internet.
Typical use of FTP is where a website developer uploads newly created web pages of their site to the host server for their website.
What is FTP based on?
FTP is based on the client–server approach where users need to sign in to the server to provide authentication. A widely used example is online shopping sites, so the user needs to sign in with a username and password before they can purchase goods by exchanging information with the server. In some cases, the FTP server can be configured so that the user is anonymous and doesn’t need to log in to access the server’s files
What does SSSH do?
Secure shell is a computer application that allows the user to log on to another networked computer to gain remote access to it. SSH provides secure connections and robust authentication where commands can be executed in the remote computer and files can be transferred between the machines.
What is SSH based on?
This technique is based on the client–server approach, where the user is the client and the computer that is controlled is the server or host.
How is SSH different to FTP?
SSH can be used to transfer files in a similar way to FTP, but with SSH the data that is transmitted is secured by public key encryption. Typically, it is used as follows:
- Secure command shell can be used by the system administrator to log in to the server remotely to execute commands such as to change document permissions or to manage user accounts without compromising system security.
- Secure file transfer can be used, for example, to set up an extranet for sharing files with customers.
- To transmit or modify data at the server.
Secure command shell typically makes use of a simple command line interface; this requires a knowledge of the specific commands and the syntax which accompanies them.
What is an email server?
Email server is a network computer whose function is to transmit, store and receive emails.
What is SMTP protocol?
SMTP protocol is the set of rules used for the transmission of emails.
What is POP3 protocol?
POP3 protocol is the set of rules used for the receipt of emails.
What is a web server?
Web server is a network computer whose function is deliver web content to clients over the Internet.
How does a web - server work?
The web server is a physical server that uses a server operating system and contains the application software necessary to establish communication using HTTP (hypertext transfer protocol). It can host one or more websites and is used to control the traffic from clients to the website.
How is data stored on a web server?
The website data that is stored on the web server consists of the web pages for that site. Web pages are created by using standards to ensure that web pages are displayed correctly on all browsers and hardware.
What is a HTML?
HTML is a mark-up language and has become a standard for web page creation because it contains all the tags used to create a web page, and it can be written in a wide variety of software applications from Notepad to Dreamweaver.
What is a web browser?
- Web browser is a software application that is used to navigate and view Internet sources of information.
- Web browsers are a user-friendly method of finding and displaying websites and information from the World Wide Web
How do we select a website to display?
We can select a website to display using the following alternative methods:
- By typing a domain name (URL) into a web browser
- By choosing a website from the result of a search
- By selecting the domain name from a list of bookmarks
