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Computer Networking
Computer networks are collections of computers which are connected together in order to communicate and transfer information. Questions about computer networks, networking protocols, and how to set them up belong here.
18,810 Questions
Which two Ethernet fiber-optic modes support distances of greater than 550 meters?
C. 1000base-lx
1000base-zx
How do you repair an operating system whenthe screen is not showing anything?
Turn the computer off then turn the computer back on
What is an open-source operating system?
Open-source means that you can get the source code of the software for free (source code is the code of the program written in a certain programing language). Operating system is the software that you use to operate your PC (like Windows or Linux)
Operating system can be any Linux or UNIX flavour, but important thing is File system. ZFS is best suite for storage, so snapshot, writable clone and replication is free. Most of the storage company used to charge too much money as snapshop/clone and replication license.
ZFS is very simple and convenient. You can use any operating system under vmware or Virtual box that support ZFS so you can manage your logical devices on top of physical devices. You don't need to purchase any hardware or software to manage your storage.
OS means operating system, which is the computer programming that 'operates' a computer. Open source refers to any application for which you can see and change the underlying code. A big advantage of an open source program is that it is a collaborative between many people. If there is a problem, many people will see the problem and work on a solution. Linux is an example of an open source operating system. Windows and Macintosh both are closed (proprietary) systems.
How the dhcp lease time renewed when the server and client in different time zone?
Leases are retained in the DHCP server database four hours after expiration. This grace period protects a client lease in case the client and server are in different time zones, the individual computer clocks are not synchronized, or the client computer is off the network when the lease expires. Expired leases are included in the list of active leases and are distinguished by a different icon.
What is the 1991 Madrid Protocol?
The Madrid Protocol went into effect in 1991. The protocol was put into place as a way to preserve and protect Antarctica.
What is the difference between a shielded and an unshielded speaker cable?
The difference between a Microphone (shielded) cable and a normal speaker cable is that, When we use a microphone we use a balanced or shielded cable (with the three pins, XLR or cannon), not a normal two wire speaker cable. We use this because the single coming from the microphone is at mic level, below LINE level (less than 1 volt). The shield on the mic cable is connected into the mixer or amp. The shield wire (RF, Radio frequency interference) single its 'waves' are then flipped (reverse phase) to cancel the interference out, any excess interference is then taken to the earth wire. With out a shielded cable you would hear annoying interference eg. The typical phone beep (please turn phone off). Speaker cable does not need a shield because the signal coming into the speaker is above MIC level and RF interference can't get in (it isn't loud enough) so there is no RF interference and no need for a shield. Hope that has been a help!
** The router modifies the TTL field, decrementing it by one.
** The router maintains the same source and destination IP.
** The router changes the source physical address to the physical address of the exit interface
What steps would you take if the internet was not working and you were starting work in 3 minutes?
try checking my connection.
Is it possible to use your Netgear WGT624v3 router as a wireless ethernet bridge?
http://kbserver.netgear.com/inquira/default.asp?ui_mode=answer&prior_transaction_id=320184&action_code=5&highlight_info=16777288,73,87&turl=http%3A%2F%2Fkbserver.netgear.com%2Fkb_web_files%2FN101496.asp&answer_id=220766469#__highlight Link to Netgear's website.
What is the function of a data pump?
if you wanna look what it inside a variable you can use data_dump function, to ilustrate clarity.
What function does Address Resolution Protocol ARP perform?
Converts IP address to Media Access Control (MAC) Address.
How digital data is sent through RF between two devices?
Basically
Each device (PDCU Portable Data Capture Unit) like they type used in supermarkets and warehouses collects the data from either a manual or automated capture. The information is the broken in to code (normally binary) and transmitted using a radio frequency specific to that device to a receiver/modem - here it is identified and the data collected and stored. In most buildings a wire loop is placed around the main work area. This acts as an Ariel making the transmission and recipt of data easier. A laptop to laptop connection in a house works very much the same only here each PC will have to be told to recognise another in its wireless catchment area. The data is transmitted by one laptop to the wirless modem, This sends it to the airwaves the other machine will then capture this information by its moden (wireless card)
What are the contributions of Philip Emeagwali to the development of the computer?
by juliana oluwole
What is the Differences between an embedded Operating system and a personal PC Operating system?
Embedded operating systems cannot be replaced with other operating systems.
embedded system are designed for dedicated applicationembedded system are tailored to specific application.
There are literally hundreds or thousands of open source operating systems.
Some of the more popular one's are Linux based, but there is also BSD or QNX or Haiku.
Look at http://distrowatch.com for Linux based open source OS, such as Ubuntu, SuSE, Red Hat, Fedora, etc.
Name three benefits from joining the information super highway?
Connectivity. You can contact people for free, and exchange thoughts with many people of different nationalities, religions, ethnicities etc.
It is easy to find information, that would otherwise take much more effort and time.
It is possible to enjoy art and entertainment produced by anybody, and to publish your own music, images, videos, blogs/opinions, games etc.
Tolerance among people can increase when coming in contact with different kinds of people, which would help decrease racism and intolerance towards e.g. homosexuals.
Of course there are down sides, but that's not what you asked about
What is TCPIP and what does it mean?
Transmission Control Protocol Internet Protocol ...
See the website link below
What is the website where i can get any program or software for free?
There is a bunch of websites offering free programs. The two most recognized are sourceforge.net and freshmeat.net
Information gathered by geographically spaced seismometers positioned to enable a three dimensional extrapolation of the position of the earthquake epicentre and the nature of the movement which caused it.
**R1(config-router)# network 172.16.0.0 0.0.31.255 area 0
There are two data flows CSD and GPRS data flow integrating with TCP/IP , we get a IP address dynamically, we can do dial/up connection by sending PPP packet or we can do gprs connection by IP packets
Important factors that can be used to comparing the various digital-to digital encoding schemes?
A lack of high-frequency components means that less bandwidth is required for transmission. In addition, lack of a direct-current (dc) component means that ac coupling via transformer is possible. The magnitude of the effects of signal distortion and interference depend on the spectral properties of the transmitted signal. Clocking: Encoding can be used to synchronize the transmitter and receiver. Error detection: It is useful to have some error detection capability built into the physical signaling encoding scheme. Signal interference and noise immunity: Certain codes exhibit superior performance in the presence of noise. Cost and complexity: The higher the signaling rate to achieve a given data rate, the greater the cost. Some codes require a signaling rate that is in fact greater than the actual data rate
