Computer Engineering Articles - Page 6 of 35

WiFi and LiFi used to send and receive data wirelessly. WiFi uses Routers and Radio Frequency whereas LiFi uses LED bulbs and Light signals to transfer and receive data.Following are the important differences between WiFi and LiFi.Sr. No.KeyWiFiLiFi1DefinitionWiFi stands for Wireless Fidelity.LiFi stands for Light Fidelity.2InventedWiFi was invented by NCR corporation on 1991.LiFi was coined by Prof. Harald Haas in 2011.3OperationWiFi transmits data using radio waves using WiFi router.LiFi transmits data using light signals using LED bulbs.4Device ComplianceWLAN 802.11/b/g/n/ac/d standard compliant devices.IrDA compliant devices.5Data Transfer SpeedWiFi transfer speed ranges from 150 Mbps to 2 Gbps.LiFi transfer speed is about 1 ... Read More

Local Area Network (LAN) is used to connect a group of networked devices to allow communication between them, whereas Virtual LAN is used to enhance the performance of multiple LANs.Read through this article to find out more about LAN and VLAN and how they are different from each other.What is LAN?A local area network (LAN) is a network limited to a particular geographic area. A switch, or stack of switches, connects a group of computers and devices using the TCP/IP protocol's private addressing mechanism.Private addresses are distinct from those of other machines on a local network. Routers are used to ... Read More

OOPOOP, refers to Object Oriented Programming and its deals with objects and their properties. Major concepts of OOPs are −Class/objectsAbstractionEncapsulationPolymorphismInheritancePOPPOP, refers to Procedural Oriented Programming and its deals with programs and functions. Programs are divided into functions and data is global.Following are the important differences between OOP and POP.Sr. No.KeyOOPPOP1DefinitionOOP stands for Object Oriented Programing.POP stands for Procedural Oriented Programming.2ApproachOOP follows bottom up approach.POP follows top down approach.3DivisionA program is divided to objects and their interactions.A program is divided into funtions and they interacts.4Inheritance supportedInheritance is supported.Inheritance is not supported.5Access controlAccess control is supported via access modifiers.No access modifiers are ... Read More

A LAN is a computer network that is limited to a particular geographic area. Ethernet, the other hand, is a LAN network standard used in wired LAN. Go through this article to find out more about the features of Ethernet and LAN and how they are different from each other.What is Ethernet?Ethernet is a widely used LAN standard. Ethernet refers to networking technologies and systems used in local area networks (LANs) to connect computers inside a single physical space. It is defined under IEEE 802.3 standards. It is very easy to understand, implement, maintain and is a low-cost implementation. It ... Read More

SDRAM and DDR are two different types of RAM. SDRAM was released in 1993 and the latest variant of SDRAM are DDR1, DDR2 and DDR3. SDRAM stands for Synchronous Dynamic Random Access Memory. SDRAM was very common before the release of DDR. SDRAM is a single data rate memory. On the other hand, DDR stands for Double Data Rate. As the name indicates, DDR provides double data transmission in each clock cycle as compared to SDRAM. Read through this article to find out more about SDRAM and DDR and how they are different from each other. What is SDRAM? SDRAM ... Read More

BOOTP, Bootstrap Protocol, is used to configure the host and get the host address along with bootstrap info. DHCP, Dynamic Host Configuration Protocol Server is an extended version of BOOTP and is used to configure the hosts dynamically.Read through this article to find out more about these two protocols and how they differ from each other.What is BOOTP?The Bootstrap Protocol is a networking protocol that allows a configuration server to provide an IP address to network devices automatically in Internet Protocol networks. RFC 951 was the first to define the BOOTP.When a network-connected machine wakes up, its IP stack sends ... Read More

A Domain Name System (DNS) server is used to translate domain names to IP Addresses and vice versa. DHCP is a client/server protocol that automatically assigns an IP address and other configuration information to an Internet Protocol (IP) host.Read through this article to find out more about DNS and DHCP and how they are different from each other.What is DNS?DNS is a hierarchical and decentralized naming system for computers, and other resources that are connected to a private network or the Internet. It connects a variety of bits of data to domain names assigned to each of the participants.DNS transforms ... Read More

UMA and NUMA are shared memory models. Multiprocessors are divided among these type of categories. In UMA, Uniform Memory Access, a single memory controller is used and it is applicable for general purpose applications and time sharing applications. In NUMA, Non-Uniform Memory Access, multi memory controllers are used. NUMA is suitable for real-time applications and time critical applications.Following are the important differences between UMA and NUMA.Sr. No.KeyUMANUMA1DefinitionUMA stands for Uniform Memory Access.NUMA stands for Non Uniform Memory Access.2Memory ControllerUMA has single memory controller.NUMA has multiple memory controllers.3Memory AccessUMA memory access is slow.NUMA memory accsss is faster than UMA memory.4BandwidthUMA has ... Read More

Hubs are basic network devices that operate at the Physical Layer and they do not perform packet filtering or addressing function; they send the data packets to all the connected devices. Switches, on the other hand, function at the Data Link Layer to connect several devices in a network. Switches are mostly utilized to transmit data packets between various network devices such as routers and servers.Read through this article to find out more about hubs and switches and how they are different from each other.What is a Switch?A switch is essentially a piece of hardware or a device responsible for ... Read More

Both Routers and Modems are network connecting devices. Routers work at the network layer and are responsible to find the shortest path for a packet, whereas Modems connect a device like desktop, laptop to the Internet. Routers connect devices across multiple networks. Read through this article to find out more about Routers and Modems and how they are different from each other. What is a Modem? A modulator-demodulator, or a modem, is a piece of hardware that transforms data from a digital format designed for direct communication between devices using specific cabling into a format suitable for transmission via ... Read More