A multiplexer allows multiple users or applications to share a common physical medium by allocating bandwidth appropriately. Expand V-SAT, ATM, FTP, EDI. 14A. V-SAT: Very Small Aperture Terminal ATM: Asynchronous Transfer Mode FTP: File Transfer Protocol EDI: Electronic Data Interchange. LONG ANSWER QUESTIONS Explain briefly any three LAN Components? A. Server: A network server is a computer designed to process requests and deliver data to other (client) computers over a local network or the Internet. Client: A client is a that accesses a service made available by a . Hubs: A network hub acts as a centralized point for data transmission to computers in a LAN. When data from one computer reaches the hub it is broadcast to every computer in the network regardless of where the data is intended to go. Explain the function of a Modem with a neat diagram? 2A. MODEM(MOdulator–DEModulator ): A modem is a that enables a to transmit over telephone or cable lines . Computer information is , whereas information transmitted over telephone lines is in the form of waves. A modem the Digital signals into analog signals (Modulate) and converts the Analog signal into Digital signal(Demodulate). Modem is only device to connect our computer with internet. The following diagram explains how the connections are made. Modems are mainly two internal modems and external modems Internal Modems: Internal modems are basically integrated on a chip. These are put up into the PCI slots of the computer. There is no need of any external power supply for internal modems. These modems use the power supply of the PC. Their installation in PC is quite very simple External Modems: A serial cable connection is needed to connect an external modem to a PC. These modems use their own power supplies. These modems have their independent controls. External modems are many types as like Cable modem and DSL modem, etc.,
•type - When using an external stylesheet on a webpage, this attribute takes the value "text/css" •href - Denotes the name and location of the external stylesheet to be used. Note: In external style sheet, you have to create two files one is for specifying styles to the tags and other is the file where you want to apply the above styles. First program will be typed in a notepad and give an extension .html and the second program will be typed in notepad and give and extension .css and then run the html program you will get the output. First Program named ess.html <html> <head> <link rel="stylesheet" type="text/css" href="style1.css" /> </head> <body> <p> The text in this paragraph will be blue. </p> </body> </html> Second program style1.css p When we run the ess.html , the output will be as follows about Internal Style Sheet. Internal or Embedded Style Sheet: Internal stylesheet is used when you want an HTML document to have a unique style. An internal stylesheet is defined using the <style> tag and goes in the head section of an HTML document. The <style> tag specifies the content type of a stylesheet with its type attribute which should be set to "text/css". In internal style sheet once if you specify the style property to any tag then it will apply to all the tags defined with in the body section. Syntax: <style type="text/css"> styles go here </style>
individual segments. • Supported by several hardware and software vendors. • All the computers have access to the larger and immediate networks. Disadvantages: • Overall length of each segment is limited by the type of cabling used. • If the backbone line breaks, the entire segment goes down. • More difficult to configure and wire than other topologies. Mesh Description: Each host is connected to all the other hosts. Advantages: Increased reliability since there are