| Class XII |
Computer Science |
Computer Science |
10 |
DNS Server Instead of remembering IP addresses, we assign a domain name to each IP. But, to access a web resource, a browser needs to find out the ... |
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| Class XII |
Computer Science |
Computer Science |
10 |
domain entry can be searched. s ummary • A computer network is an interconnection among two or more computers or computing devices. • A computer ne... |
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| Class XII |
Computer Science |
Computer Science |
10 |
a wired network. • Each NIC has a MAC address, which helps in uniquelyidentifyingthecomputeronthenetwork. • A repeater is an analog device that reg... |
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| Class XII |
Computer Science |
Computer Science |
10 |
IP address can change if a node is removed from one network and connected to another network. • The Internet is the global network of computing dev... |
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| Class XII |
Computer Science |
Computer Science |
10 |
network topologies? 8. How is tree topology different from bus topology? 9. Identify the type of topology from the following: a) Each node is conne... |
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| Class XII |
Computer Science |
Computer Science |
11 |
ha p t er C 11 Data Communication “Peoplealreadyhavebionicarmsandlegsthat workbythepowerofthought.Andweincreasingly outsourcementalandcommunicative... |
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| Class XII |
Computer Science |
Computer Science |
11 |
walkietalkie, video recording device, etc. Receiver: A receiver is a computer or any such device which is capable of receiving data from the networ... |
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| Class XII |
Computer Science |
Computer Science |
11 |
in the form of signals over a channel. One signal carries one or more bits over the channel. Data transfer rate is the number of bits transmitted b... |
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| Class XII |
Computer Science |
Computer Science |
11 |
communication 11.4.2 Half-duplex Communication Itistwowayorbidirectionalcommunicationbetweentwo devices in which both the devices can send and rece... |
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| Class XII |
Computer Science |
Computer Science |
11 |
designed to to make a dedicated connection between each pair of deliver both voice and multimedia devices (mesh topology) or between a central devi... |
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| Class XII |
Computer Science |
Computer Science |
11 |
completion of the transmission, the channel is available for transfer of packets from other communicating parties. 208 ComputerSCienCe- laSSXii Rep... |
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| Class XII |
Computer Science |
Computer Science |
11 |
media for data transmission are, twisted pair, coaxial cable, and fiber optic cable. Twisted-pair and coaxial cable carry the electric signals wher... |
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| Class XII |
Computer Science |
Computer Science |
11 |
Figure 11.10: A coaxial cable Data CommuniCation 211 Reprint 2026-27 (C) Optical Fibre The optical fiber cable carries data as light, which travels... |
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| Class XII |
Computer Science |
Computer Science |
11 |
Infrared waves and Visible or service providers. Light waves, according to their frequency ranges. Some C omputerSCienCe- ClaSXii Reprint 2026-27 o... |
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| Class XII |
Computer Science |
Computer Science |
11 |
receive data. These devices can send data within a range of 10 meters with a speed of 1 - 2 Mbps. In Bluetooth technology, the communicating device... |
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| Class XII |
Computer Science |
Computer Science |
11 |
public places Interoperability for Microwave 11.7 m obile teleCommuniCation t eChnologies Access. Like Wi-Fi, it is also used for Today the mobile ... |
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| Class XII |
Computer Science |
Computer Science |
11 |
facilitated greater voice and data capacity. Therefore, more simultaneous calls could happen in the same frequency range and also a significantly f... |
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| Class XII |
Computer Science |
Computer Science |
13 |
monitoring the project. (5) Outcome of a project: One needs to understand thoroughly the outcome of a project. The outcome can be single, or it can... |
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| Class XII |
Computer Science |
Computer Science |
11 |
of 512 Mbps. In this case, Computer B must be able to inform computer A about the speed mismatch so that computer A can adjust its data transmissio... |
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| Class XII |
Computer Science |
Computer Science |
11 |
a web browser (client) and a web server (server). HTTP facilitates access of hypertext from the World Wide Web by defining how information are form... |
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| Class XII |
Computer Science |
Computer Science |
11 |
protocol which establishes a dedicated and direct connection between two communicating devices. This protocol defines how two devices will authenti... |
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| Class XII |
Computer Science |
Computer Science |
11 |
each computer or node connected to the Internet is assigned an IP address, which is used to identify each node independently. It can be considered ... |
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| Class XII |
Computer Science |
Computer Science |
2 |
series of bytes stored one after the other. There are the author's name, mainly two types of data files — text file and binary page settings, font ... |
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| Class XII |
Computer Science |
Computer Science |
11 |
media. • The capacity of channels is measured in bandwidth. The unit of bandwidth is Hertz. • Communication can be done in three different modes — ... |
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| Class XII |
Computer Science |
Computer Science |
11 |
a client-server model of communication in which a user or machine (a client) requests a service by a server in the network. e xerCise 1. What is da... |
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