TELECOMMUNICATION & NETWORKING: 2012

Tuesday 1 May 2012

What is HTML?

HTML is a language for describing web pages.

HTML stands for Hyper Text Markup Language
HTML is not a programming language, it is a markup language
A markup language is a set of markup tags
HTML uses markup tags to describe web pages

Example Explained

The text between <html> and </html> describes the web page
The text between <body> and </body> is the visible page content
The text between <h1> and </h1> is displayed as a heading
The text between <p> and </p> is displayed as a paragraph

Tuesday 24 April 2012

Web conferencing refers to a service that allows conferencing events to be shared with remote locations. In general the service is made possible by Internet technologies, particularly on TCP/IP connections. The service allows real-time point-to-point communications as well as multicast communications from one sender to many receivers. It offers information of text-based messages, voice and video chat to be shared simultaneously, across geographically dispersed locations. Applications for web conferencing include meetings, training events, lectures, or short presentations from any computer.

Tuesday 17 April 2012

FTP

File Transfer Protocol (FTP) is a standard network protocol used to transfer files from one host to another host over a TCP-based network, such as the Internet. It is often used to upload web pages and other documents from a private development machine to a public web-hosting server. FTP is built on a client-server architecture and uses separate control and data connections between the client and the server.^[1] FTP users may authenticate themselves using a clear-text sign-in protocol, normally in the form of a username and password, but can connect anonymously if the server is configured to allow it. For secure transmission that hides (encrypts) your username and password, as well as encrypts the content, you can try using a client that uses SSH File Transfer Protocol.

Description:

Protocol suite:	TCP/IP.
Protocol type:	Transport layer connection oriented byte stream protocol.
IP Protocol:	6.
Ports:
MIME subtype:
SNMP MIBs:	iso.org.dod.internet.experimental.ipv6TcpMIB (1.3.6.1.3.86). iso.org.dod.internet.mgmt.mib-2.tcp (1.3.6.1.2.1.6). iso.org.dod.internet.mgmt.mib-2.tcpMIB (1.3.6.1.2.1.49).
Working groups:	pilc, Performance Implications of Link Characteristics. tcpimpl, TCP Implementation. tcpm, TCP Maintenance and Minor Extensions. tsvwg, Transport Area Working Group.
Links:	IANA: TCP option numbers.

TCP is a transport layer protocol used by applications that require guaranteed delivery. It is a sliding window protocol that provides handling for both timeouts and retransmissions.
TCP establishes a full duplex virtual connection between two endpoints. Each endpoint is defined by an IP address and a TCP port number. The operation of TCP is implemented as a finite state machine.
The byte stream is transfered in segments. The window size determines the number of bytes of data that can be sent before an acknowledgement from the receiver is necessary.