Virtual terminal protocol vtp, Computer Network Security

Write down the short notes on VTR. Communication between different types of the equipment and software is made possible by making use of the networks. Full-screen text editor is software using which the communication is made possible among the screen and the user. Using editor, text is displayed on screen, cursor can be moved by the user and changes can be done in the text. But, the various rows and columns on the screen are dependent on the terminal which is being used that is the commands to change the cursor  position,  perform  delete  and  insert  operations  on  text  which  varies  as per  the  type  of the terminal. This problem can be ignored by the use of Virtual Terminal Protocol (VTP).

A VTP is the data structure whose information is maintained by the local terminal or application software. This protocol is used to define state of the terminal such as its shape, current position of cursor, number of rows and columns, reverse video indicator and colour. By referencing to this protocol, user and application do their operations irrespective of the terminal-specific issues. For example, the data is displayed on the screen independent of terminal type. VTP protocol does a reverse process when data is entered by the user. This process includes the three steps given below,

(i) The format of data structure is defined by the VTP.

(ii) The user input is converted into the standard form by using the software. 

(iii) The standard screen is read by application.

In case of scrolling, the virtual terminals save more data than the data which can be the displayed on screen, as shown figure below.

 Information stored in the VTI specifies first and last lines of the data displayed window. The displayed data is then defined within the window delimiters. Each time the user scrolls, delimiters are changed by virtual terminal software, thereby retrieving different text lines on the window.

An instance of VTP is Telnet, which is the network protocol used above LANs or Internet. This protocol generates the bidirectional interactive communication among a remote user and application.

Posted Date: 7/20/2012 5:58:25 AM | Location : United States

Related Discussions:- Virtual terminal protocol vtp, Assignment Help, Ask Question on Virtual terminal protocol vtp, Get Answer, Expert's Help, Virtual terminal protocol vtp Discussions

Write discussion on Virtual terminal protocol vtp
Your posts are moderated
Related Questions
Question: (a) Distinguish between Steganograhy and Cryptography. (b) "Playfair cipher is more secure than Monoalphabetic cipher." Justify this statement. (c) Various ap


Network security has become much more complex than ever before. New types and sources of network security threats, always-on high-speed Internet connections, wireless networking, a


QUESTION (a) Define and distinguish between Electronic Commerce and Electronic Business (b) According to you what are the benefits that Electronic Commerce can brings to org

For this assessment, students must research and analyse two different scenarios. The two scenarios must be chosen from those described below and submitted as one Microsoft PowerPoi

what are the participant of marketing channal?

QUESTION (a) Describe the role of DNS root servers in the Internet network. (b) What do you understand by the handover concept in a mobile network? (c) List five meth