Which Broadband Modem is Better- Ethernet or USB?

Most of the broadband modems support two kinds of network connections- Ethernet and USB. Both of them serve the same purpose and can work in most of the situations. Users can reconfigure their modem with Ethernet and USB whenever required, but both the interfaces cannot be used simultaneously. So the question arises which type of interface is better

Ethernet is the most preferred option for connecting a broadband modem for various reasons.

First, Ethernet is technically more reliable than USB for networking purpose. You will experience less dropped connections or sluggish response time when using Ethernet over USB.

Next reason is Ethernet cables are able to reach a longer distance than USB cables.
Ethernet cables can run anywhere within a home whereas USB cables are restricted to approx 5m.

Ethernet does not require installation of device drivers, whereas USB require. Modern operating systems are capable of installing drivers for many broadband modems. The procedure varies for different operating system and all the system are not compatible with a given brand of modem. USB drivers can slow down the performance of older computers. Generally, a device driver is an additional installation step and can cause various problems that you don’t have to worry in Ethernet.
Ethernet supports higher performance networking than USB. Both the Ethernet and USB 2.0 interfaces have support for sufficient bandwidth for broadband modem.
Modem speed is restricted by the speed of modem’s connection to your service provider.

Notable advantage of USB interface over Ethernet is the hardware cost. IF the computer that is connected to a broadband modem does not have an Ethernet network adapter, that one should have to purchase it and then installed.
The other advantages of Ethernet that are described above outweigh this up front effort.

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Remote Access in Computer Networking

Question: What Is Remote Access in Computer Networks?

Answer: In computer networking, remote access technology allows operating a system as an authorized user without any physical presence on the system. It is commonly used in computer networks but can find its applications on home networks.

Remote Desktop

The most complicated form of remote access allows user on one computer to see and operate the desktop user interface of another computer. Configuring remote desktop support can be done by configuring software on both the host and target. After installation of the software we can get a view of the target computer on the host.

Presently we have current versions of Microsoft Windows as Remote Desktop connection software. However, this software only support target computers that run Professional, Enterprise or advanced versions of the O/S which make it unsuitable for  use with home networks. For Mac OS X computer, Apple Remote Desktop software package is available and that too for business networks. For Linux operating system we can see various remote desktop software available as of now.

Many of the remote desktop solutions work on Virtual Network Computing technology. Softwares based on VNC works in multiple operating systems. The speed of VNC and other remote desktop software can differ, where it performs effectively same as the local computer, but at other times it exhibit sluggish responsiveness due to network latency.

Remote Access to Files

Basic remote network access enables files to be read from and written to the target, without any support of desktop capability. With the help of Virtual Private Network (VPN) technology one can have remote login and files access functionality over wider area networks (WANs).

VPN need client software to be present on host system and VPN server technology installed on the target computer. In absence of VPN, client/server software can also be used for remote file access. SSH help to provide a command line interface to the target system.

File sharing in home or other local area network is not considered for a remote access environment.

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Operating systems in computer networks

Computers use operating system to build and run programs. Operating system software not only runs on laptop computers but also on network routers, cell phones and other embedded devices.

Types of operating system

The operating systems used on computers are

·     Microsoft Windows

·     Linux

·     Mac OS X

Some other types of operating system used for various types of equipment are

·     Google Android and Symbian- for cell phones

·     DEC VMS (Virtual Memory System)- for mainframe computers

·     Solaris, DG-UX, HP-UX and other types of Unix- for server computers

Network Operating system

A modern operating system has built in software to simplify networking of a computer. In Operating system software, there is an implementation of TCP/IP protocol stack and utility programs like traceroute and ping. This consists of necessary device drivers and other software to automatically enable a device Ethernet interface. Mobile devices provide the programs to enable Wi-Fi, Bluetooth and other wireless connectivity.

Early versions of Microsoft Windows don’t offer any computer networking support. Microsoft has added basic networking properties into its operating system like Windows 95 and Windows for Workgroups. Microsoft also comes with internet connection sharing feature in Windows98 Second edition.

In comparison to UNIX, which was designed with more emphasis on networking. Any consumer operating system today can be categorized as a network operating system due to the growing popularity of internet.

Embedded Operating systems

Embedded system supports no or limited configuration of its software. For e.g. embedded systems like routers typically consist of a pre-configured Web server, DHCP server and some of the utilities but do not allow the installation of new programs. Some of the examples of embedded operating system for routers include

·        Cisco IOS (Internetwork operating system)

·        Juniper Junos

·        DD-WRT

You can find embedded operating system inside the consumer gadgets like phones (iPhone OS), digital media players and PDAs. 

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How computer networking works

During the past 25 years, every sphere of industry has been covered by computer network of various types. Learning the basic of how these computer network works help us to better use them and also increases our knowledge of changing world around us.

What is network device?

A network device consists of special communication hardware so as to make the physical connections to other device. Most of the modern network devices have communication electronic built onto their circuit boards.

Some of the PCs, older Xbox consoles, and older devices don’t have the communications hardware but it can be set up by plugging in separate network adapters in the form of USB peripheral.

Some old desktop PCs need physically inserting large add-in cards on the system motherboard which gives origin to the term Network Interface Card.

New generation of consumer appliances and gadgets are being built as network devices whereas older devices were not.

Roles of devices on computer networks

Devices on computer networks function in different ways. The two common roles are clients and servers. PCs, phone, tablets and network printers are common examples of clients. Clients make request and use data stored in network servers. Servers include devices with large amount of memory and high performance processor to support clients. Examples of network servers are Web servers and game servers. Network generally supports many clients than servers. Clients and servers are also called network nodes.

Network devices are capable of working as both clients and servers. For e.g. in a peer to peer networking a pair of devices share data with each other, in this process one acts as a server hosting data while simultaneously working as a client to request data from peer devices.

Special purpose network devices

Server and client nodes can be added or removed from the network without blocking communication between other devices. However other types of network hardware still exist for allowing a network to run

·        A network hub allows any node connected to it directly send data to other

·        Network switches function as same as hubs but they include additional hardware logic that opens up multiple communication paths that enables multiple connected nodes to send data to each other

·        Network routers further increase the capabilities of network switches by allowing connections outward from itself to other networks and joining them together without disturbing the functionality of each of them individually.

·        A network repeater accepts the physical signals sent across a network connection and increase their strength so that the signal can travel longer distance.

·        Network bridge connects two different types of physical networks links together 

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